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[Music]

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hey christopher

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thanks for coming along today um so our

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next presentation is christopher biggs

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who's going to be talking about

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assistive

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ar on a budget

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and uh this is a topic which is

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particularly interesting to me given my

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activities over the last couple of years

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with assistive technology projects

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and i'm fascinated to see what chris has

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achieved so

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thank you very much chris and take it

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away

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all right uh greetings earthlings meat

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and metal and also to anyone else

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receiving this out there in the wider

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universe

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today i want to confirm that planet

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earth is ripe for takeover by exploring

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the hilariously poor

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state of our cognitive technology

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and confirming that the inhabitants of

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this planet are still in the ludicrously

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early stages of uplifting themselves to

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higher sentience

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but before i go on some more shameless

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self-promotion

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my background is in computer science

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my sideline as an evil roboticist is

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pretty much self-taught

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i've always since i was a teenager been

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fascinated by the possibility of bodily

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and cognitive enhancements

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and that fascination has led me to

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create accelerando innovation space

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which you see behind me

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we're a technology consultancy in

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brisbane that also provides a co-working

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and maker space

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and the work we do with our members

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ranges from full service implementation

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to just providing a roof and some tools

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and letting people go for it

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so if you're in brisbane and that's

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interesting we're also the monthly venue

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for the brisbane into the internet of

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things meetup event which we call sunday

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mad science which is an open lab

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afternoon where you can bring your

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problems and projects and broken tech

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and explore solutions with your peers

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and the project i'm going to talk about

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today is one of those things that just

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arose from sitting around at the mad

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science meetup and shooting the breeze

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so naturally an environment like

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accelerando involves a fair bit of

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multitasking and multitasking is

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something that which i am quite well

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known to be 100

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absolutely and undeniably [ __ ] awful

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look i've occasionally been known to go

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looking for a screwdriver find the exact

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one i need and then spend the next hour

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wondering where did i put the screw that

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was in my hand a minute ago

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actually i'm bullshitting a bit there

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it's not occasional it's constant that

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happens all the time and

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the current unpleasantness here in

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season 3 of 2020 seems to only make it

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worse

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now cognitive challenges can be

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addressed in a number of ways there's

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psychiatric therapy and learning coping

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techniques which i like to think of

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debugging

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for your meat wear

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pharmacological treatments are quite

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popular and i reckon this is basically

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overclocking but today i want to tell

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you about prosthetics technology for

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improved multitasking

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my friend here in brisbane monica

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bradley often says that she wishes she

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could have an operating system for her

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life and that's something that i can

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really get behind

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so i chose to look at this problem sort

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of systematically well not really what i

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actually did was read a lot of science

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fiction and watched a heap of movies

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on the left here is what comics and

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movies and novels daniel before us 3d

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holograms that obey our tactile and

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spoken commands

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on the right is the absolute cutting

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edge

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of wearable technology

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as of 1990.

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i so envied these guys back in the day i

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wanted to be them

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so

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firstly i want to look at what parts of

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the sci-fi future we've already got

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what tech is just around the corner and

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what currently imaginary tech might be

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in the pipeline

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then i'm going to go piece by piece

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through what someone on the modest

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budget that is not tony stark might be

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able to assemble today

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we'll start with a computer

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which is somewhere where we were

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actually swamped for choice

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screens not so much there's good and

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there's cheap and there's very little

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intersection and there's very little

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compromise

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cameras have been a real surprise

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there's a

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incredibly visceral do not want reaction

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from almost everyone to the idea of

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heading out of cameras and finally the

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bits that motivated me are cognitive

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aids and wearable instrumentation that

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is the apology the possibility to

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augment our data acquisition

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and multitasking ability or the lack of

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it with technology

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some people use the word pre-disabled

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with varying degrees of seriousness to

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describe those lucky people who have no

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physical or cognitive challenges yet

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the intent of that term is to highlight

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that assistive technology is not a niche

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market we are all going to need

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something

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sooner or later spectacles are

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mainstream

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hearing aids are more common than you

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think

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wheelchairs and mobility scooters are

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not uncommon but we suck at

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accommodating them so here's what i want

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for assistive technology

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what the market delivers and what i

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think is the next level

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when i first got my gsm phone in the

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1990s i read that it had something known

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as short messaging service where you

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could send a brief textual message to

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another phone but back then it didn't

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even work in australia because the

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telephone companies hadn't bothered to

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bring such an obscure and useless

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feature to market

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only text messages turned out to be a

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killer app

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pages and phone booths and voice

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messages went extinct pretty much

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immediately once people worked out how

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much more convenient a quick text

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message was

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and you might have forgotten that

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twitter started as a mobile phone

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service for messaging a group of your

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friends about what you're up to and

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where you are

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and then the tail abandoned the dog and

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we got a whole new social paradigm

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now these text messages are coming to

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our smartphone screens or to our smart

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watches and to be honest that's pretty

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freaking cool that was everything i

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wanted in the 1990s

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from

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always connected network technology a

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smartphone gives me probably two-thirds

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of my assistive tech utopia and i do

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think that in five years or so smart

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phones might get us nearly all the way

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there

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right now we all use our phones as

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torches or magnifying glasses and as

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barcode scanners to get into every damn

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shop that we go to etc and this is

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really handy but it's also a handy cap

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in that one of your hands is always

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consumed in holding the phone

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now i'm getting older

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and i've been warned that my arthritic

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hips and knees are going to give out on

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me someday soon so i'm also thinking

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about how to save on movement i want to

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have my appliances and machines stop

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demanding my physical presence so much

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and be able to interact with them from a

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distance and since we're all

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embracing remote working

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right now i think this is something that

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is only going to

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require wider attention

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now

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if you've met me in real life there's a

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good chance i forgot your name within 10

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seconds

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and please don't think it's because i

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don't care but

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for an introvert like me meeting someone

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new is a heck of a cognitive load

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memorizing a face

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doing the right bow or elbow bump or

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having a bit of handshake smiling and

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thinking of something to say pausing

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what that person said it's a huge cpu

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spike and it seems that in my case the

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background process

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that moves important information from

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short-term memory

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to long-term just glitches out for a

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moment if i hear the name again i'm good

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because after that initial processing

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spike everything works okay

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so sometimes i wish i could just reround

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the last 20 seconds of audio

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even

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subtitles would be a bonus too

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in order to catch something that i

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missed or that i failed to record during

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a moment of uh cognitive embarrassment

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now recording data is another place

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where our phones

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are both great and awful i bet you've

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got a photo roll full of cat pictures

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and shopping receipts and white boards

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and phone cameras are a fabulous way

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to record little snippets of information

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but they're a terrible way to then

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process that information to return to it

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to find it again

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a task switching is another area where

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i'd love to have mechanical help if i'm

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working on three things at once and i

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jump from one task to another how can i

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use technology to help me get back to

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the previous task or even remember what

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it was

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and the last thing i'm wishing for is

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extra sensors the ability

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as as the previous pension speaker

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mentioned to see in radar to

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perhaps see temperature to see

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electricity

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how can i

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uh replace a bunch of

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uh

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sensor devices that i might normally

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carry around

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uh throughout the course of a day with

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something that is always in my body

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so i mentioned

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that

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i drew inspiration from science fiction

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and futurism and i want to call out some

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of the milestones in that process

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uh early 1980s robocop

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apparently he runs ms-dos

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not something i'd recommend

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but that idea of information overlaid on

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a visual field is something that

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we've all found compelling

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and i think

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the market has had a few terribly

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unfortunate stabs at

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robocop 2 apparently ran rakos which i

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can get behind

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this is from terminator 2 again the

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concept

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of uh visual overlay

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and

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nearly 30 years later we're all still

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talking about minority report the idea

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of interacting tactilely

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with um

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00:10:58,320 --> 00:11:02,399
with virtual information now there's one

289
00:11:01,120 --> 00:11:04,160
series of books that i've been reading

290
00:11:02,399 --> 00:11:06,800
recently that i want to particularly

291
00:11:04,160 --> 00:11:09,120
call out and this is the uh the series

292
00:11:06,800 --> 00:11:11,839
known as the murderbot diaries and this

293
00:11:09,120 --> 00:11:11,839
is about uh

294
00:11:11,920 --> 00:11:18,720
a uh an enslaved cyborg who uh who

295
00:11:15,519 --> 00:11:20,320
breaks themselves free from their

296
00:11:18,720 --> 00:11:22,720
from their masters

297
00:11:20,320 --> 00:11:24,399
and

298
00:11:22,720 --> 00:11:27,120
one of the um one of the interesting

299
00:11:24,399 --> 00:11:29,600
concepts is of autonomous sensor drones

300
00:11:27,120 --> 00:11:31,360
which go away and look at things and

301
00:11:29,600 --> 00:11:34,399
allow you to

302
00:11:31,360 --> 00:11:37,040
to visualize

303
00:11:34,399 --> 00:11:39,120
the physical orientation of stuff when

304
00:11:37,040 --> 00:11:40,240
you're not physically there

305
00:11:39,120 --> 00:11:42,959
and that's something that i'm going to

306
00:11:40,240 --> 00:11:45,600
come back to when i get a little bit

307
00:11:42,959 --> 00:11:47,920
more into the detail

308
00:11:45,600 --> 00:11:49,120
so that's the setup that's what i want

309
00:11:47,920 --> 00:11:51,760
to do

310
00:11:49,120 --> 00:11:55,279
and why i want to do it and some of the

311
00:11:51,760 --> 00:11:57,600
people who inspired me to try

312
00:11:55,279 --> 00:11:59,279
so let's talk about how do you do that

313
00:11:57,600 --> 00:12:01,839
if you're not

314
00:11:59,279 --> 00:12:03,519
uh mark zuckerberg or

315
00:12:01,839 --> 00:12:06,560
tony stark

316
00:12:03,519 --> 00:12:10,079
now i mentioned that computing is an

317
00:12:06,560 --> 00:12:12,639
area in which we are pretty well served

318
00:12:10,079 --> 00:12:15,040
everybody used to point to the raspberry

319
00:12:12,639 --> 00:12:17,839
pi zero as

320
00:12:15,040 --> 00:12:17,839
the great cheap

321
00:12:20,079 --> 00:12:23,519
unit of compute

322
00:12:21,839 --> 00:12:26,000
and until a few months ago i would have

323
00:12:23,519 --> 00:12:27,760
screamed no no do not not powerful

324
00:12:26,000 --> 00:12:30,959
enough

325
00:12:27,760 --> 00:12:32,079
um the the thing i've been using is

326
00:12:30,959 --> 00:12:35,519
um

327
00:12:32,079 --> 00:12:39,279
a gadget called the banana pi zero which

328
00:12:35,519 --> 00:12:39,279
has a quad-core processor

329
00:12:40,160 --> 00:12:43,519
bluetooth

330
00:12:42,000 --> 00:12:46,240
usb

331
00:12:43,519 --> 00:12:47,360
but just recently it was leapfrogged by

332
00:12:46,240 --> 00:12:50,079
the

333
00:12:47,360 --> 00:12:53,440
new raspberry pi zero two so i withdraw

334
00:12:50,079 --> 00:12:55,120
my objection to raspberry pi and i i can

335
00:12:53,440 --> 00:12:57,440
tell you that if you were going to start

336
00:12:55,120 --> 00:12:59,760
with a project like this today

337
00:12:57,440 --> 00:13:01,760
um something like that that raspberry pi

338
00:12:59,760 --> 00:13:03,839
zero model two

339
00:13:01,760 --> 00:13:07,600
is a great choice

340
00:13:03,839 --> 00:13:10,240
but the one thing that all of those

341
00:13:07,600 --> 00:13:13,040
what i call zero glass boards

342
00:13:10,240 --> 00:13:17,120
uh suffer from is they've only got

343
00:13:13,040 --> 00:13:18,480
512 megabytes of memory only

344
00:13:17,120 --> 00:13:21,440
and that's

345
00:13:18,480 --> 00:13:24,399
pushing it to run a web browser or

346
00:13:21,440 --> 00:13:27,440
even a graphical environment

347
00:13:24,399 --> 00:13:30,240
so i'm going to um

348
00:13:27,440 --> 00:13:32,880
drop some hints later about how to

349
00:13:30,240 --> 00:13:35,279
do things without the the baggage of

350
00:13:32,880 --> 00:13:38,079
browsers and

351
00:13:35,279 --> 00:13:40,160
and even display managers

352
00:13:38,079 --> 00:13:43,279
um the raspberry pi 4 has got eight giga

353
00:13:40,160 --> 00:13:45,040
ram and it's good but it's a bit too big

354
00:13:43,279 --> 00:13:46,160
to go in planting in your body i would

355
00:13:45,040 --> 00:13:47,519
think

356
00:13:46,160 --> 00:13:48,800
um

357
00:13:47,519 --> 00:13:49,920
and

358
00:13:48,800 --> 00:13:51,120
there's

359
00:13:49,920 --> 00:13:53,040
there's also a thing called the

360
00:13:51,120 --> 00:13:54,800
raspberry pi compute module which is

361
00:13:53,040 --> 00:13:56,240
essentially the raspberry pi without all

362
00:13:54,800 --> 00:13:58,320
the ports

363
00:13:56,240 --> 00:14:01,199
um and in our case we don't want too

364
00:13:58,320 --> 00:14:04,240
many of the ports but hdmi is the one

365
00:14:01,199 --> 00:14:06,160
that i can't escape at the moment

366
00:14:04,240 --> 00:14:08,560
and so

367
00:14:06,160 --> 00:14:09,519
i wish i wish i wish there was some way

368
00:14:08,560 --> 00:14:12,160
to

369
00:14:09,519 --> 00:14:14,079
either have a magsafe hdmi or do i have

370
00:14:12,160 --> 00:14:17,279
a wireless hdmi

371
00:14:14,079 --> 00:14:19,199
but we're not quite there um

372
00:14:17,279 --> 00:14:20,079
you know there's continuing rumors about

373
00:14:19,199 --> 00:14:21,760
apple

374
00:14:20,079 --> 00:14:23,680
coming up with some kind of wireless

375
00:14:21,760 --> 00:14:25,920
head mounted display and i'm super

376
00:14:23,680 --> 00:14:30,160
excited to see that come to market

377
00:14:25,920 --> 00:14:31,839
uh but right now unfortunately the um

378
00:14:30,160 --> 00:14:34,800
the video choices which i'll go into a

379
00:14:31,839 --> 00:14:37,519
bit later are just

380
00:14:34,800 --> 00:14:39,199
not great at the low end

381
00:14:37,519 --> 00:14:42,959
operating system-wise if you're running

382
00:14:39,199 --> 00:14:44,480
a raspberry pi use the raspberry pi os

383
00:14:42,959 --> 00:14:46,480
if you're running anything

384
00:14:44,480 --> 00:14:48,320
that is a single board computer that's

385
00:14:46,480 --> 00:14:50,560
not a raspberry pi you're probably going

386
00:14:48,320 --> 00:14:52,880
to want ambien which is

387
00:14:50,560 --> 00:14:54,560
a fabulous community supported

388
00:14:52,880 --> 00:14:57,120
distribution for

389
00:14:54,560 --> 00:14:58,560
all the

390
00:14:57,120 --> 00:15:01,120
all the um

391
00:14:58,560 --> 00:15:03,040
uh single boards out there that aren't

392
00:15:01,120 --> 00:15:04,079
um raspberry pi

393
00:15:03,040 --> 00:15:05,360
um

394
00:15:04,079 --> 00:15:06,160
ambien

395
00:15:05,360 --> 00:15:08,240
uh

396
00:15:06,160 --> 00:15:09,360
comes in either debian or a bunch of

397
00:15:08,240 --> 00:15:13,199
flavors

398
00:15:09,360 --> 00:15:15,760
uh you can now get um vanilla ubuntu

399
00:15:13,199 --> 00:15:18,720
straight on your raspberry pi 4. i'd

400
00:15:15,760 --> 00:15:21,199
really advise not doing that unless

401
00:15:18,720 --> 00:15:23,360
there's something you can't live without

402
00:15:21,199 --> 00:15:25,519
because there's just too much stuff

403
00:15:23,360 --> 00:15:27,920
running

404
00:15:25,519 --> 00:15:29,519
on our standard ubuntu system

405
00:15:27,920 --> 00:15:31,759
for you to

406
00:15:29,519 --> 00:15:33,920
uh get the battery life

407
00:15:31,759 --> 00:15:36,079
and the uh the thermal behavior that

408
00:15:33,920 --> 00:15:40,959
you're gonna need

409
00:15:36,079 --> 00:15:41,759
um so powering powering a

410
00:15:40,959 --> 00:15:44,000
a

411
00:15:41,759 --> 00:15:45,680
a wrist or an arm mounted computer

412
00:15:44,000 --> 00:15:47,279
um

413
00:15:45,680 --> 00:15:49,759
the

414
00:15:47,279 --> 00:15:50,560
the power bank industry has done a solid

415
00:15:49,759 --> 00:15:51,839
there

416
00:15:50,560 --> 00:15:54,079
in that

417
00:15:51,839 --> 00:15:56,639
you can buy a little circuit board

418
00:15:54,079 --> 00:15:59,120
that's that's no wider than your battery

419
00:15:56,639 --> 00:16:00,000
uh that takes care of all your charging

420
00:15:59,120 --> 00:16:01,279
um

421
00:16:00,000 --> 00:16:03,040
should tells you

422
00:16:01,279 --> 00:16:04,320
your charge level gives you a nice solid

423
00:16:03,040 --> 00:16:06,480
five volts

424
00:16:04,320 --> 00:16:09,199
um and you can just plug a usb cable in

425
00:16:06,480 --> 00:16:12,000
to charge it so this is what i'm using

426
00:16:09,199 --> 00:16:14,240
at the moment for my systems uh

427
00:16:12,000 --> 00:16:15,199
a battery that is essentially a phone

428
00:16:14,240 --> 00:16:17,040
battery

429
00:16:15,199 --> 00:16:18,399
uh that has its own short circuit

430
00:16:17,040 --> 00:16:20,240
protection

431
00:16:18,399 --> 00:16:24,720
and a little power bank board which

432
00:16:20,240 --> 00:16:24,720
gives me five volts now screen wise

433
00:16:26,560 --> 00:16:31,680
screen wise uh

434
00:16:29,040 --> 00:16:33,839
in the there's

435
00:16:31,680 --> 00:16:35,680
google glass was all the thing a couple

436
00:16:33,839 --> 00:16:37,199
of years ago

437
00:16:35,680 --> 00:16:38,959
you know it cost three thousand dollars

438
00:16:37,199 --> 00:16:40,959
it had this camera attached to it that

439
00:16:38,959 --> 00:16:43,600
everybody freaked out about

440
00:16:40,959 --> 00:16:45,440
um and then it kind of fell off the

441
00:16:43,600 --> 00:16:48,720
public consciousness now it's still for

442
00:16:45,440 --> 00:16:50,320
sale um with some

443
00:16:48,720 --> 00:16:52,399
restrictions in what's called an

444
00:16:50,320 --> 00:16:54,480
enterprise version

445
00:16:52,399 --> 00:16:57,199
and microsoft has this fabulous piece of

446
00:16:54,480 --> 00:16:58,560
technology called hololens which

447
00:16:57,199 --> 00:17:01,040
um

448
00:16:58,560 --> 00:17:02,880
is bigger than i like it's gorgeous to

449
00:17:01,040 --> 00:17:05,039
wear it looks absolutely incredible from

450
00:17:02,880 --> 00:17:07,039
the inside

451
00:17:05,039 --> 00:17:08,799
but

452
00:17:07,039 --> 00:17:10,559
i don't want to carry

453
00:17:08,799 --> 00:17:12,319
something that big

454
00:17:10,559 --> 00:17:15,120
i need to be able to wear

455
00:17:12,319 --> 00:17:17,280
safety glasses or welding goggles

456
00:17:15,120 --> 00:17:19,120
or what have you from time to time and

457
00:17:17,280 --> 00:17:20,640
not necessarily want to take something

458
00:17:19,120 --> 00:17:21,600
else off

459
00:17:20,640 --> 00:17:24,079
um

460
00:17:21,600 --> 00:17:25,360
and so the least awful solution that

461
00:17:24,079 --> 00:17:26,559
i've found

462
00:17:25,360 --> 00:17:28,960
so far

463
00:17:26,559 --> 00:17:31,760
is this little gadget from a company

464
00:17:28,960 --> 00:17:35,120
called viewfind which costs about 200

465
00:17:31,760 --> 00:17:37,039
u.s around about 300 australian

466
00:17:35,120 --> 00:17:38,880
and what it will do is

467
00:17:37,039 --> 00:17:40,640
it comes with a pair of

468
00:17:38,880 --> 00:17:43,120
fake spectacles if you're not already

469
00:17:40,640 --> 00:17:45,120
encumbered with them and if you are

470
00:17:43,120 --> 00:17:46,880
then it can strap to the to the arm of

471
00:17:45,120 --> 00:17:48,480
your spectacles

472
00:17:46,880 --> 00:17:49,919
and it essentially

473
00:17:48,480 --> 00:17:52,799
gives you

474
00:17:49,919 --> 00:17:54,080
something that looks not unlike a

475
00:17:52,799 --> 00:17:56,559
kind of poor

476
00:17:54,080 --> 00:17:58,960
2014 inch crt monitor

477
00:17:56,559 --> 00:18:01,440
floating in your visual field

478
00:17:58,960 --> 00:18:03,200
and it's intended just to to go right in

479
00:18:01,440 --> 00:18:06,559
the middle of one of your eyes

480
00:18:03,200 --> 00:18:07,600
but i've found that

481
00:18:06,559 --> 00:18:09,200
it also

482
00:18:07,600 --> 00:18:11,440
works quite well

483
00:18:09,200 --> 00:18:12,400
uh just sitting above

484
00:18:11,440 --> 00:18:14,799
your

485
00:18:12,400 --> 00:18:16,400
view line so you can still see forwards

486
00:18:14,799 --> 00:18:18,640
with

487
00:18:16,400 --> 00:18:20,720
with both eyes but if you glance up you

488
00:18:18,640 --> 00:18:22,960
can see your screen

489
00:18:20,720 --> 00:18:25,120
and that's that's a real winner for me

490
00:18:22,960 --> 00:18:28,840
is is to have

491
00:18:25,120 --> 00:18:28,840
something that is

492
00:18:29,280 --> 00:18:35,440
all there all the time but it's not

493
00:18:33,039 --> 00:18:36,400
obscuring your face too badly

494
00:18:35,440 --> 00:18:39,280
and

495
00:18:36,400 --> 00:18:42,320
um you can access it without having to

496
00:18:39,280 --> 00:18:46,559
do anything with your hands

497
00:18:42,320 --> 00:18:46,559
now cameras i've mentioned are a

498
00:18:46,799 --> 00:18:49,679
real turn off for a lot of people i used

499
00:18:48,720 --> 00:18:52,480
to have

500
00:18:49,679 --> 00:18:54,240
a little bluetooth locator that just

501
00:18:52,480 --> 00:18:56,480
stuck to the side of my glasses and all

502
00:18:54,240 --> 00:18:57,760
it did was it beat if i lost my

503
00:18:56,480 --> 00:18:59,520
spectacles because i have a couple of

504
00:18:57,760 --> 00:19:00,559
pairs i switch between them and i always

505
00:18:59,520 --> 00:19:02,400
lose them

506
00:19:00,559 --> 00:19:04,400
and

507
00:19:02,400 --> 00:19:05,919
anytime anybody noticed that they would

508
00:19:04,400 --> 00:19:08,960
always say the same thing they'd say

509
00:19:05,919 --> 00:19:11,039
that's not a camera is it

510
00:19:08,960 --> 00:19:13,280
it's a real

511
00:19:11,039 --> 00:19:14,640
point of terror for people

512
00:19:13,280 --> 00:19:15,440
for someone to have a camera on their

513
00:19:14,640 --> 00:19:17,760
head

514
00:19:15,440 --> 00:19:19,360
and i don't think there's any way around

515
00:19:17,760 --> 00:19:22,400
that but

516
00:19:19,360 --> 00:19:22,400
what i'm gonna do

517
00:19:22,840 --> 00:19:28,160
is put the camera on your hand

518
00:19:26,080 --> 00:19:29,919
because what i want it for is those

519
00:19:28,160 --> 00:19:31,840
instances where i've got some tiny

520
00:19:29,919 --> 00:19:34,160
little circuit board and i need to read

521
00:19:31,840 --> 00:19:36,000
the serial number off of the chip

522
00:19:34,160 --> 00:19:38,640
or i want a

523
00:19:36,000 --> 00:19:41,200
bit of light down a dark hole

524
00:19:38,640 --> 00:19:42,960
um so my approaches here are to use

525
00:19:41,200 --> 00:19:45,440
either the camera module out of a laptop

526
00:19:42,960 --> 00:19:46,720
computer so a little circuit board talks

527
00:19:45,440 --> 00:19:47,760
over usb

528
00:19:46,720 --> 00:19:49,440
or an

529
00:19:47,760 --> 00:19:51,840
endoscope camera

530
00:19:49,440 --> 00:19:53,600
and these endoscope cameras uh they have

531
00:19:51,840 --> 00:19:55,760
terrible resolution

532
00:19:53,600 --> 00:19:56,880
uh they're only about four frames a

533
00:19:55,760 --> 00:19:58,400
second

534
00:19:56,880 --> 00:20:00,080
um

535
00:19:58,400 --> 00:20:02,480
but they're essentially focus free which

536
00:20:00,080 --> 00:20:04,559
means yeah they'll they'll

537
00:20:02,480 --> 00:20:06,880
they'll register a room

538
00:20:04,559 --> 00:20:09,039
they'll register um

539
00:20:06,880 --> 00:20:10,000
the writing on a on an integrated

540
00:20:09,039 --> 00:20:11,600
circuit

541
00:20:10,000 --> 00:20:12,880
just as happily and they've got built-in

542
00:20:11,600 --> 00:20:16,080
lights

543
00:20:12,880 --> 00:20:18,080
so uh this is my current go-to for

544
00:20:16,080 --> 00:20:20,480
um i need

545
00:20:18,080 --> 00:20:22,559
some augmented vision

546
00:20:20,480 --> 00:20:24,640
uh the other thing which is really handy

547
00:20:22,559 --> 00:20:26,559
is is wi-fi cameras

548
00:20:24,640 --> 00:20:27,919
um there's a number of mod models in the

549
00:20:26,559 --> 00:20:30,960
market

550
00:20:27,919 --> 00:20:33,280
and i use these around my home

551
00:20:30,960 --> 00:20:34,799
where they're either permanently

552
00:20:33,280 --> 00:20:36,400
installed there's one on the laundry

553
00:20:34,799 --> 00:20:38,880
which has a view

554
00:20:36,400 --> 00:20:40,480
of the washing machine so we can tell

555
00:20:38,880 --> 00:20:43,440
is it finished

556
00:20:40,480 --> 00:20:46,320
is it loaded is it unloaded

557
00:20:43,440 --> 00:20:48,320
and i have some others which um there's

558
00:20:46,320 --> 00:20:49,840
one here in the office which looks into

559
00:20:48,320 --> 00:20:51,760
reception to tell me if there's anybody

560
00:20:49,840 --> 00:20:53,679
there and i have some that are battery

561
00:20:51,760 --> 00:20:55,440
powered that i can just magnet on so if

562
00:20:53,679 --> 00:20:58,080
i'm working with um

563
00:20:55,440 --> 00:20:59,520
with a machine that's doing a job and i

564
00:20:58,080 --> 00:21:00,720
i want to know it's finished i might

565
00:20:59,520 --> 00:21:03,039
have a

566
00:21:00,720 --> 00:21:04,799
bandsaw that's going to take uh 20

567
00:21:03,039 --> 00:21:07,600
minutes to soar a

568
00:21:04,799 --> 00:21:09,360
10 centimeter wide steel bar in half

569
00:21:07,600 --> 00:21:13,840
i can set up a camera overlooking the

570
00:21:09,360 --> 00:21:15,440
saw and be able to just switch tasks and

571
00:21:13,840 --> 00:21:17,280
occasionally

572
00:21:15,440 --> 00:21:19,440
check in on

573
00:21:17,280 --> 00:21:22,000
on a camera

574
00:21:19,440 --> 00:21:24,320
to see how that task is going

575
00:21:22,000 --> 00:21:24,320
now

576
00:21:24,559 --> 00:21:28,000
the way that i

577
00:21:25,919 --> 00:21:30,640
do this

578
00:21:28,000 --> 00:21:33,440
on a on a limited uh

579
00:21:30,640 --> 00:21:35,430
compute device like a

580
00:21:33,440 --> 00:21:38,080
one of the zero boards

581
00:21:35,430 --> 00:21:40,400
[Applause]

582
00:21:38,080 --> 00:21:45,360
um so use

583
00:21:40,400 --> 00:21:46,270
uh g streamer um and the

584
00:21:45,360 --> 00:21:49,280
the um

585
00:21:46,270 --> 00:21:52,000
[Music]

586
00:21:49,280 --> 00:21:54,240
the frame buffer output so i can

587
00:21:52,000 --> 00:21:57,039
essentially pop up as

588
00:21:54,240 --> 00:21:59,120
one two three or four

589
00:21:57,039 --> 00:22:01,120
video windows on my little virtual

590
00:21:59,120 --> 00:22:03,200
monitor

591
00:22:01,120 --> 00:22:05,360
that

592
00:22:03,200 --> 00:22:08,480
that overlay whatever other information

593
00:22:05,360 --> 00:22:08,480
is being shown

594
00:22:08,640 --> 00:22:12,640
and the other

595
00:22:10,559 --> 00:22:14,159
the other thing that i use all the time

596
00:22:12,640 --> 00:22:15,679
is is a

597
00:22:14,159 --> 00:22:17,600
frame buffer

598
00:22:15,679 --> 00:22:19,919
um

599
00:22:17,600 --> 00:22:21,840
pdf viewer because

600
00:22:19,919 --> 00:22:23,120
my other killer app for head mounted

601
00:22:21,840 --> 00:22:25,200
displays

602
00:22:23,120 --> 00:22:29,120
is being able to read documentation so

603
00:22:25,200 --> 00:22:30,480
if i'm working on a circuit board or i'm

604
00:22:29,120 --> 00:22:32,240
working on a car

605
00:22:30,480 --> 00:22:34,159
i might have or an appliance i might

606
00:22:32,240 --> 00:22:36,159
have the service manual

607
00:22:34,159 --> 00:22:37,520
in digital form or the data sheet in

608
00:22:36,159 --> 00:22:42,880
digital form

609
00:22:37,520 --> 00:22:42,880
and i can throw that up on on screen

610
00:22:45,120 --> 00:22:51,360
again it's a it's a much more

611
00:22:48,720 --> 00:22:52,400
resource appropriate way of viewing a

612
00:22:51,360 --> 00:22:56,320
pdf

613
00:22:52,400 --> 00:22:56,320
than doing it in a um

614
00:22:56,559 --> 00:22:59,360
in a web browser

615
00:23:02,240 --> 00:23:08,799
keyboard-wise um i love various little

616
00:23:06,840 --> 00:23:10,640
um

617
00:23:08,799 --> 00:23:11,760
miniature keyboards which are intended

618
00:23:10,640 --> 00:23:13,679
for use

619
00:23:11,760 --> 00:23:14,720
with smart tvs

620
00:23:13,679 --> 00:23:17,440
um

621
00:23:14,720 --> 00:23:19,360
i i use one which has a keyboard on one

622
00:23:17,440 --> 00:23:20,400
side and

623
00:23:19,360 --> 00:23:22,640
a

624
00:23:20,400 --> 00:23:25,600
gravity mouse on the other side so i can

625
00:23:22,640 --> 00:23:28,240
flip it over and just entire my arm

626
00:23:25,600 --> 00:23:30,960
and that provides me with um

627
00:23:28,240 --> 00:23:34,679
with spatial input or i can

628
00:23:30,960 --> 00:23:34,679
i can type some commands

629
00:23:36,799 --> 00:23:40,880
on the little keyboard gadget and the

630
00:23:38,960 --> 00:23:43,679
way i'm currently operating this is i i

631
00:23:40,880 --> 00:23:47,120
have it attached to my uh attached to my

632
00:23:43,679 --> 00:23:50,480
armband computer with uh

633
00:23:47,120 --> 00:23:52,240
with magnets as we say um

634
00:23:50,480 --> 00:23:55,039
now one of the things i bought while i

635
00:23:52,240 --> 00:23:56,720
was exploring this whole process is it

636
00:23:55,039 --> 00:23:58,880
is a uh

637
00:23:56,720 --> 00:24:01,200
an offshoot of the google cardboard vr

638
00:23:58,880 --> 00:24:02,400
where you plug your uh your mobile phone

639
00:24:01,200 --> 00:24:03,840
into a box

640
00:24:02,400 --> 00:24:06,720
um and it gives you a head up display

641
00:24:03,840 --> 00:24:07,760
these work quite well but

642
00:24:06,720 --> 00:24:08,880
um

643
00:24:07,760 --> 00:24:10,880
you know they're not some they don't

644
00:24:08,880 --> 00:24:13,440
give you through vision so

645
00:24:10,880 --> 00:24:14,799
um if you if you're a virtual space

646
00:24:13,440 --> 00:24:16,720
that's great if you're in a physical

647
00:24:14,799 --> 00:24:18,080
space where you need overlay not so good

648
00:24:16,720 --> 00:24:20,559
but they come with this nifty little

649
00:24:18,080 --> 00:24:23,760
joystick um which is just a bluetooth

650
00:24:20,559 --> 00:24:25,919
device and uh for the 20 bucks of this

651
00:24:23,760 --> 00:24:29,200
gadget cost uh that little joystick

652
00:24:25,919 --> 00:24:32,880
itself is uh is worth the money

653
00:24:29,200 --> 00:24:35,600
now let's talk about cognitive aids

654
00:24:32,880 --> 00:24:39,200
so i like to have

655
00:24:35,600 --> 00:24:39,200
a stack of tasks that i'm doing

656
00:24:40,159 --> 00:24:42,480
and

657
00:24:44,000 --> 00:24:47,440
the mobile phone equivalent is you take

658
00:24:45,840 --> 00:24:48,640
a photo of whatever you were last

659
00:24:47,440 --> 00:24:51,279
working on

660
00:24:48,640 --> 00:24:53,279
um when you switch tasks so you know

661
00:24:51,279 --> 00:24:55,679
where you're up to when you go back

662
00:24:53,279 --> 00:24:57,440
um and so what i

663
00:24:55,679 --> 00:24:59,679
have worked on is

664
00:24:57,440 --> 00:25:01,520
coming up with a with a macro button on

665
00:24:59,679 --> 00:25:04,080
my keyboard which does the same thing so

666
00:25:01,520 --> 00:25:05,840
i can go okay i was here

667
00:25:04,080 --> 00:25:06,960
give me a photo give me a five second

668
00:25:05,840 --> 00:25:09,200
voice note

669
00:25:06,960 --> 00:25:11,039
um and now i'm gonna switch tasks

670
00:25:09,200 --> 00:25:12,640
um and the other thing that i'm i'm

671
00:25:11,039 --> 00:25:15,120
working with

672
00:25:12,640 --> 00:25:18,000
which is kind of unrelated to this

673
00:25:15,120 --> 00:25:19,760
project but it's it's part of my idea

674
00:25:18,000 --> 00:25:22,320
which is just a little

675
00:25:19,760 --> 00:25:24,080
uh flashing led and in this case

676
00:25:22,320 --> 00:25:25,760
you can now buy leds that have all the

677
00:25:24,080 --> 00:25:28,720
flashing circuits being built in so this

678
00:25:25,760 --> 00:25:30,320
is literally just a

679
00:25:28,720 --> 00:25:33,919
lithium battery

680
00:25:30,320 --> 00:25:36,159
and an led and maybe a switch

681
00:25:33,919 --> 00:25:38,240
and i have

682
00:25:36,159 --> 00:25:41,200
about six colors of these

683
00:25:38,240 --> 00:25:43,360
and if i'm interrupted from a task i

684
00:25:41,200 --> 00:25:44,559
turn one on or drop it where i was i go

685
00:25:43,360 --> 00:25:46,880
away

686
00:25:44,559 --> 00:25:48,240
and when i am uninterrupted i turn

687
00:25:46,880 --> 00:25:50,320
around and i look for the flashing light

688
00:25:48,240 --> 00:25:51,520
okay that's what i was doing last

689
00:25:50,320 --> 00:25:53,760
um

690
00:25:51,520 --> 00:25:57,279
as uh as someone who is professionally

691
00:25:53,760 --> 00:25:59,039
frazzled um this is something that is

692
00:25:57,279 --> 00:26:00,720
really helping me to

693
00:25:59,039 --> 00:26:02,480
get that under control

694
00:26:00,720 --> 00:26:07,760
now instrumentation

695
00:26:02,480 --> 00:26:07,760
um as a as an evil robot engineer

696
00:26:07,840 --> 00:26:14,000
i'm often

697
00:26:10,159 --> 00:26:16,880
carrying a multimeter around or a

698
00:26:14,000 --> 00:26:18,159
or a digital storage oscilloscope

699
00:26:16,880 --> 00:26:19,760
or

700
00:26:18,159 --> 00:26:21,679
even

701
00:26:19,760 --> 00:26:23,679
working with blowtorches or other nasty

702
00:26:21,679 --> 00:26:26,559
tools

703
00:26:23,679 --> 00:26:28,640
um what i'd love to be able to measure

704
00:26:26,559 --> 00:26:29,360
uh with my fingertips

705
00:26:28,640 --> 00:26:31,039
is

706
00:26:29,360 --> 00:26:33,919
for one voltages

707
00:26:31,039 --> 00:26:36,320
you know is this thing powered up

708
00:26:33,919 --> 00:26:39,520
for two temperature is that thing still

709
00:26:36,320 --> 00:26:40,640
200 degrees or can i pick it up yet

710
00:26:39,520 --> 00:26:42,559
um

711
00:26:40,640 --> 00:26:45,120
so

712
00:26:42,559 --> 00:26:46,640
how do we do this um

713
00:26:45,120 --> 00:26:48,960
without uh

714
00:26:46,640 --> 00:26:52,000
ending up carrying too much stuff

715
00:26:48,960 --> 00:26:53,919
or without ending up

716
00:26:52,000 --> 00:26:56,000
breaking wires

717
00:26:53,919 --> 00:26:58,240
and just in the last six months or so it

718
00:26:56,000 --> 00:26:59,520
seems that magnetic connections have

719
00:26:58,240 --> 00:27:01,600
gone from

720
00:26:59,520 --> 00:27:04,240
really hard to find to

721
00:27:01,600 --> 00:27:07,360
absolutely dirt cheap and available in

722
00:27:04,240 --> 00:27:10,080
whatever you want so when you've got

723
00:27:07,360 --> 00:27:12,000
um when you've got i squared c sensors

724
00:27:10,080 --> 00:27:13,919
um

725
00:27:12,000 --> 00:27:15,200
that need four wires

726
00:27:13,919 --> 00:27:18,080
um

727
00:27:15,200 --> 00:27:20,720
you know 50 cents will get you a pair of

728
00:27:18,080 --> 00:27:22,960
four pin magnetic connectors which allow

729
00:27:20,720 --> 00:27:23,919
you to swap sensors in or out off of

730
00:27:22,960 --> 00:27:25,600
your

731
00:27:23,919 --> 00:27:28,480
your wearable computing

732
00:27:25,600 --> 00:27:30,960
um and another possibility is bluetooth

733
00:27:28,480 --> 00:27:33,360
i've designed a couple of really small

734
00:27:30,960 --> 00:27:35,360
low-cost bluetooth boards

735
00:27:33,360 --> 00:27:36,960
into which you can plug

736
00:27:35,360 --> 00:27:38,960
whichever sensor you want and you've

737
00:27:36,960 --> 00:27:40,799
basically got a little

738
00:27:38,960 --> 00:27:42,640
matchbox size puck

739
00:27:40,799 --> 00:27:45,120
that can be a temperature sensor or a

740
00:27:42,640 --> 00:27:46,840
voltage sensor or whatever

741
00:27:45,120 --> 00:27:50,480
and they broadcast

742
00:27:46,840 --> 00:27:52,480
their their identity and values via

743
00:27:50,480 --> 00:27:54,640
bluetooth low energy so i have an app on

744
00:27:52,480 --> 00:27:56,159
my gadget which just says hey what

745
00:27:54,640 --> 00:27:57,600
sensors are around me what are they

746
00:27:56,159 --> 00:28:00,159
currently saying

747
00:27:57,600 --> 00:28:01,760
and so i can turn turn a gadget on

748
00:28:00,159 --> 00:28:03,679
uh drop it

749
00:28:01,760 --> 00:28:04,720
in the position near a job

750
00:28:03,679 --> 00:28:06,960
um

751
00:28:04,720 --> 00:28:06,960
and

752
00:28:07,120 --> 00:28:13,360
have that input streaming to my device

753
00:28:10,320 --> 00:28:15,919
so let's look now at what this all

754
00:28:13,360 --> 00:28:18,720
actually looks like in its current uh

755
00:28:15,919 --> 00:28:20,720
prototype state

756
00:28:18,720 --> 00:28:22,960
so here we have

757
00:28:20,720 --> 00:28:26,640
um

758
00:28:22,960 --> 00:28:28,240
a chunk of the eva foam the um

759
00:28:26,640 --> 00:28:29,279
the cosplayers

760
00:28:28,240 --> 00:28:31,200
go to

761
00:28:29,279 --> 00:28:33,279
material

762
00:28:31,200 --> 00:28:34,480
into which we have sewn

763
00:28:33,279 --> 00:28:36,960
a battery

764
00:28:34,480 --> 00:28:36,960
and a

765
00:28:37,440 --> 00:28:43,200
power supply board

766
00:28:39,120 --> 00:28:44,640
and a in this case banana pi zero

767
00:28:43,200 --> 00:28:46,159
and we've got our

768
00:28:44,640 --> 00:28:49,840
keyboard

769
00:28:46,159 --> 00:28:51,039
um slash mouse uh magnetically affixed

770
00:28:49,840 --> 00:28:52,799
to that

771
00:28:51,039 --> 00:28:54,080
um and we've got our head mounted

772
00:28:52,799 --> 00:28:56,080
display

773
00:28:54,080 --> 00:28:58,799
and

774
00:28:56,080 --> 00:29:00,399
here it is in its uh

775
00:28:58,799 --> 00:29:02,320
hilarious

776
00:29:00,399 --> 00:29:03,679
um

777
00:29:02,320 --> 00:29:05,919
physicality

778
00:29:03,679 --> 00:29:06,720
and i think i would probably fit right

779
00:29:05,919 --> 00:29:09,120
in

780
00:29:06,720 --> 00:29:11,039
with uh with those heroes of mine from

781
00:29:09,120 --> 00:29:14,559
the

782
00:29:11,039 --> 00:29:14,559
come back there 1990s perhaps uh

783
00:29:14,640 --> 00:29:18,559
spotted me a little jacket

784
00:29:17,120 --> 00:29:21,520
now

785
00:29:18,559 --> 00:29:23,279
i'm not sure that i would say to you go

786
00:29:21,520 --> 00:29:25,200
out and build one of these right now

787
00:29:23,279 --> 00:29:27,840
because i'm starting to think that maybe

788
00:29:25,200 --> 00:29:30,480
the arm isn't the right place

789
00:29:27,840 --> 00:29:33,360
um there's a youtuber who is uh

790
00:29:30,480 --> 00:29:34,720
who's doing great stuff named or jay

791
00:29:33,360 --> 00:29:37,120
and he's built himself a little

792
00:29:34,720 --> 00:29:38,799
shoulder-mounted uh

793
00:29:37,120 --> 00:29:41,120
companion pet

794
00:29:38,799 --> 00:29:42,559
which which does tricks for him

795
00:29:41,120 --> 00:29:43,520
um

796
00:29:42,559 --> 00:29:45,360
and

797
00:29:43,520 --> 00:29:48,000
i'm really starting to think that either

798
00:29:45,360 --> 00:29:50,320
say the back of the head or on your

799
00:29:48,000 --> 00:29:53,679
shoulder or

800
00:29:50,320 --> 00:29:55,120
the upper arm is a place to put

801
00:29:53,679 --> 00:29:57,520
something perhaps a little bit bigger in

802
00:29:55,120 --> 00:30:00,720
a raspberry pi size computer

803
00:29:57,520 --> 00:30:03,039
that can can use those magnetic fixtures

804
00:30:00,720 --> 00:30:06,480
to um to connect to sensors that are

805
00:30:03,039 --> 00:30:08,320
down at this level

806
00:30:06,480 --> 00:30:10,880
so

807
00:30:08,320 --> 00:30:13,039
that's a a whirlwind tour of where i'm

808
00:30:10,880 --> 00:30:15,120
at in

809
00:30:13,039 --> 00:30:18,320
in um

810
00:30:15,120 --> 00:30:19,520
in wearable sensing and uh data

811
00:30:18,320 --> 00:30:23,200
acquisition

812
00:30:19,520 --> 00:30:24,640
um head mounted cameras um unfortunately

813
00:30:23,200 --> 00:30:26,880
they're just poison

814
00:30:24,640 --> 00:30:29,440
um finger mounted cameras however i

815
00:30:26,880 --> 00:30:32,720
think are a huge win

816
00:30:29,440 --> 00:30:34,799
um gravity and accelerometers is a is a

817
00:30:32,720 --> 00:30:37,520
fascinating input device

818
00:30:34,799 --> 00:30:39,360
head mounted displays right now

819
00:30:37,520 --> 00:30:41,760
you know that viewfinder device is four

820
00:30:39,360 --> 00:30:43,600
years old and there's still nothing that

821
00:30:41,760 --> 00:30:45,760
touches it on the market

822
00:30:43,600 --> 00:30:47,440
um i'm really interested to see what

823
00:30:45,760 --> 00:30:49,200
apple and

824
00:30:47,440 --> 00:30:51,039
samsung come up with with their roommate

825
00:30:49,200 --> 00:30:52,240
products

826
00:30:51,039 --> 00:30:54,960
and there's an old saying that a

827
00:30:52,240 --> 00:30:57,200
computer is a machine to help you think

828
00:30:54,960 --> 00:30:59,360
and that can be whatever it means for

829
00:30:57,200 --> 00:30:59,360
you

830
00:30:59,919 --> 00:31:03,919
whatever

831
00:31:01,440 --> 00:31:05,919
you struggle to stay on top of is what

832
00:31:03,919 --> 00:31:08,000
your computer ought to be doing we have

833
00:31:05,919 --> 00:31:10,399
the same here at salarando

834
00:31:08,000 --> 00:31:12,720
we get computers to worry about things

835
00:31:10,399 --> 00:31:15,519
so that you don't have to

836
00:31:12,720 --> 00:31:17,519
and i hope that

837
00:31:15,519 --> 00:31:18,559
you can find computers to worry about

838
00:31:17,519 --> 00:31:20,159
your

839
00:31:18,559 --> 00:31:22,799
anxieties also

840
00:31:20,159 --> 00:31:26,399
and uh with us being here in in season

841
00:31:22,799 --> 00:31:29,519
three at 2020 um i think remote sensing

842
00:31:26,399 --> 00:31:31,679
and remote monitoring is something that

843
00:31:29,519 --> 00:31:34,320
we all

844
00:31:31,679 --> 00:31:36,799
would like to be doing more of

845
00:31:34,320 --> 00:31:38,240
so that's what i have for you uh thank

846
00:31:36,799 --> 00:31:41,200
you for your attention

847
00:31:38,240 --> 00:31:43,519
um and i think we're probably

848
00:31:41,200 --> 00:31:47,120
running a bit short on time but uh happy

849
00:31:43,519 --> 00:31:48,720
to take questions etc oh great thank you

850
00:31:47,120 --> 00:31:50,320
very much christopher

851
00:31:48,720 --> 00:31:52,480
um yeah there are a couple of questions

852
00:31:50,320 --> 00:31:53,760
we are slightly over time but

853
00:31:52,480 --> 00:31:55,919
questions are good

854
00:31:53,760 --> 00:31:57,360
and the audience always have good things

855
00:31:55,919 --> 00:31:59,679
to ask about

856
00:31:57,360 --> 00:32:01,919
one of the questions is which ar glasses

857
00:31:59,679 --> 00:32:03,679
should i keep an eye on as a wheelchair

858
00:32:01,919 --> 00:32:06,880
user who has been waiting for these for

859
00:32:03,679 --> 00:32:06,880
10 plus years

860
00:32:07,120 --> 00:32:10,120
um

861
00:32:17,840 --> 00:32:21,440
there is another reason there is another

862
00:32:19,440 --> 00:32:22,640
product which i'm struggling to remember

863
00:32:21,440 --> 00:32:24,799
the name of

864
00:32:22,640 --> 00:32:27,679
that's um that's a little bit higher up

865
00:32:24,799 --> 00:32:29,120
the budget tree um my friend pat

866
00:32:27,679 --> 00:32:30,480
catanzariti

867
00:32:29,120 --> 00:32:33,279
um

868
00:32:30,480 --> 00:32:36,159
who you'll find us at patcat on twitter

869
00:32:33,279 --> 00:32:39,519
uh wrote an article last year which is

870
00:32:36,159 --> 00:32:40,320
uh the top 10 ar displays on the market

871
00:32:39,519 --> 00:32:43,600
so

872
00:32:40,320 --> 00:32:45,679
if you go and search uh

873
00:32:43,600 --> 00:32:47,840
for his article that's

874
00:32:45,679 --> 00:32:49,360
probably the uh the best answer i can

875
00:32:47,840 --> 00:32:51,279
give at the moment

876
00:32:49,360 --> 00:32:53,840
okay all of those products unfortunately

877
00:32:51,279 --> 00:32:56,080
were in the thousand price range uh this

878
00:32:53,840 --> 00:32:57,519
viewfinder one is the only uh anyone i

879
00:32:56,080 --> 00:32:59,120
found that's

880
00:32:57,519 --> 00:33:00,480
um

881
00:32:59,120 --> 00:33:01,600
under 500.

882
00:33:00,480 --> 00:33:02,559
yep

883
00:33:01,600 --> 00:33:04,720
another

884
00:33:02,559 --> 00:33:05,919
suggestion was this is going back to the

885
00:33:04,720 --> 00:33:08,480
start of the presentation you were

886
00:33:05,919 --> 00:33:10,480
talking about little sbc single board

887
00:33:08,480 --> 00:33:12,159
computers someone said have you seen the

888
00:33:10,480 --> 00:33:14,320
red shirt right i'm not sure how to

889
00:33:12,159 --> 00:33:17,760
pronounce it redshirt zero which is a

890
00:33:14,320 --> 00:33:20,159
quad a53 four gigabytes of memory and uh

891
00:33:17,760 --> 00:33:22,559
pi zero form factor

892
00:33:20,159 --> 00:33:24,960
no but that sounds fabulous

893
00:33:22,559 --> 00:33:27,120
memory oh my goodness

894
00:33:24,960 --> 00:33:29,120
so that's something to check out and the

895
00:33:27,120 --> 00:33:30,880
final question is are you worried about

896
00:33:29,120 --> 00:33:33,760
the resistance and signal integrity with

897
00:33:30,880 --> 00:33:34,640
those magnetic connectors

898
00:33:33,760 --> 00:33:37,360
um

899
00:33:34,640 --> 00:33:39,519
not so much

900
00:33:37,360 --> 00:33:40,720
particularly using i squared c

901
00:33:39,519 --> 00:33:42,640
um

902
00:33:40,720 --> 00:33:44,000
there is there are some booster chips

903
00:33:42,640 --> 00:33:45,519
that are things that are called active

904
00:33:44,000 --> 00:33:47,440
terminators

905
00:33:45,519 --> 00:33:49,360
i don't know uh how familiar the

906
00:33:47,440 --> 00:33:51,760
audience is with i squared c but it's

907
00:33:49,360 --> 00:33:53,600
it's what's called an open collector

908
00:33:51,760 --> 00:33:56,080
mechanism so

909
00:33:53,600 --> 00:33:57,279
rather than driving a high signal on a

910
00:33:56,080 --> 00:33:59,120
low signal

911
00:33:57,279 --> 00:34:00,480
you've got a resistor which gives you a

912
00:33:59,120 --> 00:34:01,760
sort of weak pull up to your high

913
00:34:00,480 --> 00:34:04,080
voltage

914
00:34:01,760 --> 00:34:05,440
and you drive a zero for the low voltage

915
00:34:04,080 --> 00:34:06,880
and that means that you can have

916
00:34:05,440 --> 00:34:09,359
multiple things connected on a bus

917
00:34:06,880 --> 00:34:12,879
really easily but it also does mean that

918
00:34:09,359 --> 00:34:15,040
it is pretty poor over long distances

919
00:34:12,879 --> 00:34:16,800
but just recently there's some chips

920
00:34:15,040 --> 00:34:18,480
that you can get which

921
00:34:16,800 --> 00:34:20,639
intelligently

922
00:34:18,480 --> 00:34:23,760
slam the bus up and down for you

923
00:34:20,639 --> 00:34:25,119
uh to give you more range and more speed

924
00:34:23,760 --> 00:34:26,639
so

925
00:34:25,119 --> 00:34:30,800
yeah we're actually finding that we can

926
00:34:26,639 --> 00:34:30,800
uh we can go further with those tables

927
00:34:31,200 --> 00:34:34,800
very good

928
00:34:32,240 --> 00:34:36,320
okay um well we had better stop now

929
00:34:34,800 --> 00:34:38,079
because we've got only a few minutes

930
00:34:36,320 --> 00:34:40,720
until our next presentation so thank you

931
00:34:38,079 --> 00:34:42,159
christopher that was fascinating um

932
00:34:40,720 --> 00:34:43,599
everybody else we've got about a five

933
00:34:42,159 --> 00:34:46,919
minute break and then we'll be back with

934
00:34:43,599 --> 00:34:46,919
the next presentation