When the blade passes in between then, the receiver shuts off a transistor connected to one of the Arduino’s external interrupt pins.

Using an Arduino Pro Mini, a handful of buttons, and a standard TFT display, [Ricardo] has put together a serviceable little receiver with a fairly impressive user interface.

All the info you need right here ✦ In this occasion I'll make a lighting system to be controlled remotely from my rc using ...

Tolik777's Instructables walkthrough provides the details, but basically you're strapping an Arduino controller with a motor driver and Bluetooth receiver to an old RC car chassis, and controlling ...