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Tracked tank mobile robot RC platform with Arduino + parafoil kite 102 inches (2.5 m) of wing span - great fun

This product is courtesy of It was super easy to make this mobile tracked platform and radio-controlled useful for building ...
Hackaday

The 200 LED Ring Clock

There are LED clocks, and then there are LED clocks that can blind you from 30 paces. [Stiggalicious’s] LED ring clock is of the latter variety. 200 WS2812B/Neopixel RGB LEDs drive the ring clock to ...