I’ve finally managed to make more Heart Spark V2.0s! It’s been a lot more trouble than I anticipated – basically, I had some beginners luck with soldering the 0.4mm pitch pins on the ATTINY24, and once that luck ended, it took me a long time to get it working again. New paste, some layout changes, […]

The new version of Heart Spark is finally available! The new Heart Spark has a whole series of design changes: New rectangular shape, since so many people complained about the Heart shape 16 HUGE LEDs in a line New microcontroller (attiny24) saves a lot of power, increasing battery life to at least 50 hours! Three […]