Uploaded September 2017 | Updated September 2026, 1 week ago

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Fidget spinner tachometer update - now using big LED Matrix display and reflective optical sensor TCRT5000.
Parts:
- Arduino Pro Mini
- MAX7219 LED Matrix
- TCRT5000 sensor
- tactile switch for changing display modes

More information in my previous videos:
youtube.com/watch?v=hTvJCCtt__8
youtu.be/42qNfPOYlR8

Source code:
github.com/cbm80amiga/LEDMatrix_tacho_TCRT5000