LED Matrix Sand Toy
thingiverse
Simulated LED Sand Physics! Watch this! These LEDs respond to movement, mimicking an effect of gravity. An Adafruit LED matrix brings these LEDs to life as tiny grains of sand, powered by sampling an accelerometer with Raspberry Pi Zero. The 3D-printed handles make it easy to grasp the 64x64 LED Matrix, while two buttons enable you to switch modes or reset simulations easily! Get the full guide here: https://learn.adafruit.com/matrix-led-sand/
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