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Synthead

@ Synthead @lemmy.world

Posts
3
Comments
24
Joined
3 yr. ago

  • I reverse-engineered all Timex Datalink watches and devices, the Notebook Adapter, and the CRT graphics in Ruby!

    Jump

  • Hey thanks! That's my favorite one! Congratulations!

    Your 150 supports WristApps, which are little 6805 binaries that get uploaded into ~780 KiB storage over the Datalink connection! It's tiiiiiny, but enough to have programs for useful things like countdown timers, small games, etc. I'm kinda thinking of making a collection of links to WristApps somewhere to keep these things from getting lost to time.

    Here's a fun example!

    https://www.pouet.net/prod.php?which=87121

    And here's a video of it :D

    https://www.youtube.com/watch?v=T9GiiOL-B8U

    For the Notebook Adapter emulator, the RPi Picos should work great, too! Adjust the GPIO pin to the onboard LED, and it should just work! The whole thing is mostly just passing serial data around, making an LED light up, and sleep statements :)

  • I reverse-engineered all Timex Datalink watches and devices, the Notebook Adapter, and the CRT graphics in Ruby!

    Jump

  • Congratulations! Which one did you go with?

  • I reverse-engineered all Timex Datalink watches and devices, the Notebook Adapter, and the CRT graphics in Ruby!

    Jump

  • I noticed that the Datalink 50 and 70 watches (along with other protocol 1 devices) are very finicky, yeah. The Datalink 150 and 150s is much better, although not perfect. The success of the transfer needs a bright CRT monitor, and your room should ideally be free of flashing devices, like florescent bulbs and some LED bulbs.

    My Notebook Adapter emulator, with a bright white LED attached, is a significant improvement. It can sync a Datalink 150 watch several feet away! In fact, the light is so bright, that if you hold it too close to the watch, it'll saturate the optical sensor and cause transfer errors simply due to its brightness. If you point the LED sideways, this fixes this issue and makes transfers work just about every time. Check it out:

    This picture is from my timex-datalink-arduino GitHub repo at https://github.com/synthead/timex-datalink-arduino! Feel free to make your own!