Casio’s first smart ring has innovative features like a stopwatch and flashing alarm
The ring watch’s screen even has a light, and an alarm function that will flash the display instead of playing an audible ...
Hackaday13y
ATtiny Hacks: Stopwatch Turned Race Clock
While commercial models cost a pile of money, the team was able to source a dual clock / stopwatch with a nice big display, and hack it up with an Attiny13. The stopwatch is deactivated when the ...