I’m harking back to my earlier days and looking for ways to reduce the load on human memory.  Smart watches help with a lot of tasks, but a relatively small number are tasks that matter.  Indeed many of those tasks seem to have been created by other applications that want to grab the remaining 2-3% of our attention that isn’t consumed by Facebook et al. during waking hours.  Have I charged my phone, and where the hell is my phone seem to be common new memory challenges we didn’t used to have.

Wearable devices are increasingly intended to be worn 24 hours a day.  Indeed many watches have programs to measure sleep.  With the Apple watch, it’s a challenge to monitor sleep patterns regularly because the watch needs to be on charge for several hours – presumably overnight.  So the need for either fast charging, or infinite battery life is clear.

One challenge for the designer is making something that users actually find crucial for the daily activities of life.  I contend that telling the time is no longer that important because we all have our phones to hand when we are out – and anyway we are all over-scheduled.  Social media, and email already provide distractions of dubious benefit most of the time.  After a while they become an irritation.

Even if you have an exercise tracker like FitBit, there clearly comes a point for many people when it is no longer necessary to know how far our how fast you walked, or ran.  After a few months you just know.  FirBit gets left behind if it no longer serves a valuable purpose.

Objective 1:  do something new that is new and clearly valuable – not a new, made-up task to sell more advertising.  Then there is some chance it will get used for a long time.
I’d just mention here some work I did on “agenda-benders” and “the frequency and severity of memory failures”.

There’s another challenge for the designer.  When a wearable device is taken off, there is a finite chance that it won’t be put back on.  You’ are probably distracted and forget.  The longer you have it off, the more likely you are to be distracted, and forget.  I speak, at the very least, for myself here.

Even if I took off my watch intending to immediately replace it , there is still some finite chance I would be distracted and forget to replace it (It’s a bastard getting old).   The longer it is off the more likely I am to be distracted. 

My anecdotal studies suggest that for a FitBit with a recharge time of 3 hours, and a battery life of about a week, 50% are discarded after about 6 months.   It would be interesting to know how many Apple watches languish in drawers after 6 months.

Objective 2: minimize time off wrist.

I won’t dwell on the killer app right now, but instead focus on the recharge challenge.

It is probably the case that I can’t make a device that will run forever from whatever energy can be scavenged from the human body’s heat of activity.  But perhaps…

So can I make a device that you don’t have to take off?  What about a device that only has to be taken off for a very short time – before you can be distracted and forget to put it back on.

And then of course there is the infrastructure.  People find it very hard to understand that devices lean on each other for support – especially if some of them don’t seem to do much that’s useful.   Who on earth remembers to replace the battery in a thermostat until the house freezes, or fries? 

In this case the infrastructure are anchors, and they need to be located in places that are not near a source of power.  Alternatively the power cord won’t stretch or is ugly.  Can we make anchors that don’t need power cords.

So I’d like to try out some power strategies by exploring the options for super-short charging, and or no-charging at all – i.e. scavenging.   There is nothing new about this, but I have not seen solutions in this space yet.

Virus-free. www.avast.com

Make it even less tight.

Results

I still seem to have the parameters wrong, it seems to be the same size as v7.  What the hell is this geriatric fool doing?

I had a lot of issues getting the damned tophat to stick to the plate.  I discovered there were platen issues.  Someone had gouges indentations in both plates.

The filament was not sticking, and looked like it would end up with an indentation in the side like v7.  I rotated the plate and changed filament and got a decent print.

It actually fits well enough that I have been able to wear it for almost 24 hours continuously.  It is perhaps still a tad tight, but it isn’t worrying me unduly.

The bad

• The finished object had a lot of minor scarf on it that need picking off because it irritated my wrist, especially at the opening round the circular end.  I scratched it off and it was much better.
• White shows the dirt!

Improvements

Rounding the end and putting fillets on the both endges of the opening would probably help.

The schematic has a network called “HV booster” that has some scary wiggly components on it.
http://www.plasticlogic.com/wp-content/uploads/Hummingbird_9.5.pdf

I’m wondering if it means I have to make a board, and find some sort of connector?
It appears that this can be interfaced directly to a uC with not extra stuff because it has an embedded “Ultrachip” processor 

There’s a git library of code too. https://github.com/plasticlogic

Complete misfire on this version.  Somehow I managed to shrink the wrist width parameter and made it way too small.   Pretty much impossible to get on, and uncomfortably tight.

Adjusted the parameters and re-printed.

• It came out almost as intended this time
• It flexes well
• It fits snugly

The Bad

• It’s quite a lot harder to get on with the reduced gap
• It’s still perhaps a bit too tight.
• Top flexing
  If a display is to be mounted in the top surface then it has to be able to flex, or I have to find a design that doesn’t flex when you put it on.

The Ugly

• There was a minor printing issue.  The top-hat didn’t stick properly and it curled up.  This led to a small imperfection in the cuff itself.