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Time Machine Mk. V

Update of my previous project, the Time Machine Mk. IV. A BLE-enabled watch built from scratch. Cyberpunk and motorsport inspired design!

Eric MinEric Min
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The Time Machine Mk. V is an upgraded version of last year's Time Machine Mk. IV. It uses the same processor, but adds in a bigger battery, a serial port, and a debug port. The battery is a CR2032 which is four times larger than the Mark IV's CR1225 battery. A utility port allows for easy firmware upgrades and debugging. The Mk. V is better than the Mk. IV in almost every way, and I'm super happy with how it turned out. I also made a special blue and gold version, inspired by one of my dream cars, the Subaru WRX STI.

Please check out the links below the photos, especially my website! I put a full write-up there and I have some more projects you might like. Also, check out the short youtube vid, it shows some of the cool animations I've programmed into the watch!

clock_mk5.js

JS code for the watch. The watch needs to be flashed with Espruino before you upload this.

x-javascript - 17.37 kB - 08/15/2020 at 00:16

Download

tm5.sch

Eagle schematic. Absolutely horrendous, but works

sch - 495.62 kB - 08/15/2020 at 00:16

See BOM
Download

tm5_schematic.pdf

PDF of schematic

Adobe Portable Document Format - 19.77 kB - 08/15/2020 at 00:16

Preview
Download

tm5.brd

Eagle board file.

brd - 134.56 kB - 08/15/2020 at 00:16

Download

tm5_board.pdf

PDF of PCB

Adobe Portable Document Format - 49.41 kB - 08/15/2020 at 00:16

Preview
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View all 6 files

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Jon wrote 09/05/2020 at 16:46 • point

Have you been watching the market for any possible rechargeable replacement for your coin cell? Also, is there a possibility of underdriving those LEDs to conserve power a little while still retaining visibility? The revision I'd like to imagine would ditch BLE but add USB for charging and/or syncing with a PC. Given that there are a lot of platforms to choose that run Espruino this might be relatively trivial to code (leaving the hard/fun part of the physical design). Please keep revising!

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