I made my own stackmat timer display at a fraction of the cost of the original (Demo + Tutorial)

[Jayanth]

Depending on what you already have, this should cost around $15-20 to make.

I wrote up a long article describing how to put everything together, and it includes a 16-minute video tutorial. It also contains some interesting technical background. Check it out here: https://jayanth-rajakumar.github.io/ledmat/

The Arduino code is open source, and you can contribute to it here.

 

[cubizh]

Thanks for sharing.
I am surprised you have so good results on the V4 timer.
Did you test it in earlier V2 and V3 stackmat models?
I made my own a while ago too but for some reason the signals I was receiving from the V4 were very inconsistent when comparing to V2 and some V3 that made it not worth it.

 

[Jayanth]

Not yet, but I'll try to test it on as many timers as possible when I go to a comp in a couple of weeks.

I've tried it on a QJ and Gen4 so far, and it was actually quite a pain to get it to work on both. I think if it has to come to that, I'll add some kind of hardware switch to select the brand of the timer, and have the code act accordingly.

I did experience a weird distortion in the signal on the Gen4 that was causing junk to be displayed on the screen whenever I placed both hands on the timer. Took me quite a while to find a workaround for that.

Also, I'd be glad to see more of what you've done

 

[I_<3_SCS]

This looks like a fun weekend project. Thanks Jayanth

Sent from my iPhone 8C