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  • Actually what I did successfully (with an Espruino pico - not a puck) was this:

    • have two LED strips with about 20 LEDs each on two separate pins
    • have a hall effect sensor to a third pin
    • Pico + Strips powered by 4 x AAA rechargable batteries (so about 4,8V)
    • built into a bicycle wheel

    The software:

    • the time between two passings of the magnet are measured.
    • the whole time is divided into about 30-40 slices
    • for each slice a different color pattern is pushed to the two LED stripes

    -> POV effect with JS interpreted Espruino!
    Call that too slow... ;-)

    (just uploaded a picture and video; the flickering is mainly from the phones camera. Looks quite steady with your eyes)


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