3 ms·
Anybody that wants one of these: this looks like it would be /trivially/ easy to build. An attiny85 and a vibration motor would do it. The only "hard" part wo
by blhack 13y ago
Anybody that wants one of these: this looks like it would be /trivially/ easy to build. An attiny85 and a vibration motor would do it.
The only "hard" part would be fitting a battery in this form factor.
Go to your local hackerspace during some open hours, and tell the hackers you want to build one of these. I bet they'll do it with you!
(Hell: I'LL do it with you if you come down to heatsync labs [in Phoenix])
- mcantelon 13y agoProbably a lipoly battery this size would work.
- warmwaffles 13y agoThat sounds super dangerous. I would not put a lipoly battery on my arm. No thank you, I'll take my chances with another battery type.
- mcantelon 13y agoPeople put lipoly batteries to their faces each day (in phones), so probably not that big a danger.
- ilyanep 13y agoI'm not a hardware person; could you explain to me why a watch battery wouldn't work in this case. Is it just too low power?
- blhack 13y agoIt would work! A cr2032 is a super common "coin cell" battery that we use for all kinds of stuff. The "problem" with this is how long it will run for. A watch battery, or a coin cell doesn't have much current capacity.
- GusClark 13y agoI was thinking that it would be easy to add this functionality to my pebble watch.
- DanitaBaires 13y agoI was exactly what I thought. Is there any "watchapp" that does this?
- metalcring 13y agoThere is an interval trainer app for running but I think it will work for this. Set it up for 5 minute intervals and you should get a similar functionality. The only thing is it won't run in the background so you have to keep the app open.
- stevewillows 13y agoWould it be possible to make a fully analog version of this by tearing apart an old kinetic watch?
- whatshisface 13y agoI'd imagine the vibration would quickly drain the energy stored in an analog watch's spring.