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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So I had a second timer firing interrupts every quarter second and using it to control two bulbs - one every 1/4 second toggling on/off and and one every second. To be more festive I took advantage of the extra inverters and had one alternate bulb. The logic in the main() loop is ...
a software-based digital countdown timer implemented on Internet-ready Arduino Mega 2560 embedded system development board with an intelligent liquid crystal display unit as well as an overlapping mattress with an automatic backup uninterrupted power supply system such that the durations of the pressure...
And 20 seconds is way longer than you think it is without a prompt. Continue reading “Handwashing Timer Makes Sure The Suds Stay On Long Enough” → Posted in Medical HacksTagged animated, arduino, countdown, handwash, hygiene, led, matric, neopixel, proximity, timer ...