More images: https://imgur.com/a/ZBQolYz Inspired by Mechlabs’ MechWatch: https://www.instructables.com/MechWatch-a-Custom-Digital-Watch/ which in turn seems to be heavily inspired by the Makerbot Watch: http://makerbot.wikidot.com/makerbot-watch I really liked the idea of having a portable project that I could show off to people I meet, and also have been dying to get a neat watch (was going to get a casio calculator watch.) Had the idea for a PCB watch, looked it up, stumbled upon the mechwatch, and opened my EDA. Runs on ATTINY85 which controls 24 + 4 LEDs- the outer ring displays the hour, the inner ring displays the nearest 5 minutes, and the four central LEDs display the minutes past the nearest 5. I’ve just gotten it assembled and still need to program it (which is the hard part for me). But I have a prototype on breadboard as a proof of concept so I’m about 75% sure it’ll work eventually. While all other PCB watches I’ve seen are blank until you press a button to momentarily display the time, I much prefer the idea of an always-on watch so I don’t have to interact with a button to tell the time. So I’m trading a battery life of months for a battery life of approx 16 hours. But so be it. “5700 Joules” is a reference to vintage watches printing “21/etc Jewels” which indicated higher end watches (until jewels became trivially inexpensive, but anyway.) 5700 is somehow related to the 430mAh battery but I’ve forgotten how I reached that number, so it could be totally random for all I know… Case is 3D printed on my Voron 2.4 but eventually I want to resin print in translucent black resin for smoothness and so you can see the circuits inside. Takes standard 22mm quick-release watchbands. White LEDs for hour, blue LEDs for minutes. Integrates battery charging circuit on the backside, charges on 5V/USB from magnetic contacts in the bottom of the case.
where comments?
More images: https://imgur.com/a/ZBQolYz
Inspired by Mechlabs’ MechWatch: https://www.instructables.com/MechWatch-a-Custom-Digital-Watch/ which in turn seems to be heavily inspired by the Makerbot Watch: http://makerbot.wikidot.com/makerbot-watch
I really liked the idea of having a portable project that I could show off to people I meet, and also have been dying to get a neat watch (was going to get a casio calculator watch.) Had the idea for a PCB watch, looked it up, stumbled upon the mechwatch, and opened my EDA.
Runs on ATTINY85 which controls 24 + 4 LEDs- the outer ring displays the hour, the inner ring displays the nearest 5 minutes, and the four central LEDs display the minutes past the nearest 5.
I’ve just gotten it assembled and still need to program it (which is the hard part for me). But I have a prototype on breadboard as a proof of concept so I’m about 75% sure it’ll work eventually.
While all other PCB watches I’ve seen are blank until you press a button to momentarily display the time, I much prefer the idea of an always-on watch so I don’t have to interact with a button to tell the time. So I’m trading a battery life of months for a battery life of approx 16 hours. But so be it.
“5700 Joules” is a reference to vintage watches printing “21/etc Jewels” which indicated higher end watches (until jewels became trivially inexpensive, but anyway.) 5700 is somehow related to the 430mAh battery but I’ve forgotten how I reached that number, so it could be totally random for all I know…
Case is 3D printed on my Voron 2.4 but eventually I want to resin print in translucent black resin for smoothness and so you can see the circuits inside. Takes standard 22mm quick-release watchbands. White LEDs for hour, blue LEDs for minutes. Integrates battery charging circuit on the backside, charges on 5V/USB from magnetic contacts in the bottom of the case.
God job Op that’s impressive
What are those two chips on the rear of the board?
The socket head cap screws are a nice touch.
That’s fantastic! Great work!