Inside resides an Arduino that does the counting and turns off the row of lights, one every 2 seconds, as the countdown continues. A speaker not only ticks and tocks its way down with the lights, it also buzzes when time is up. Starting and resetting the timer is as easy as pushing...
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I'd hate to go the dumbed-down Arduino C++ route if I didn't have to. I'd prefer C on these small machines. Ed December 09, 2015 by Rick_S Most of the code you compile for the nerdkit can be easily ported to the ATMEGA32u4 on the the teensy using AVR-GCC just like with ...
Wash Timer This is an easy-to-build timer to use while washing your hands which doesn't involve trying to sing a song in your head. Just wave your hand in front of it and wait for the LEDs to go off. Here are the modules I used to build it, but honestly, you could replace any...
Time on target and plenty of friction are the keys to that, and [Denis Hennessy]’s “WashTimer” aims to at least help you out with the former. His build is as simple as can be: an Arduino driving an LED matrix when a proximity sensor fires. Wave your dirty paws in front of the...