I built my platform to show at school, it runs an engine and lights a led RGB randomly. The display shows the RPM speed and the temperature of the 2N2222 trasistor with a Dallas temperature sensor.
To detect rounds i use an encoder with a laserbeam and a photoresistor. When i connect to the NODEMCU, i control the engine speed, the RGB led and i read the tempereature and the spin rate too.
Video:
www.youtube.com/watch?v=u4YARVlT0Y4& … e=youtu.be
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