Make: Easy 1+2+3 Projects

Sensor SenseAbility

By Cy Tymony ■ Illustrations by Mark Frauenfelder

You will need

RC car

Watch batteries

Buzzer

Wire

LEDs

Seltzer tablet

Universal AC adapter

Wireless remote alarm sensor Make different types of alarms and sensors with a cheap remote control car.

Inexpensive radio-controlled cars have many sneaky adaptation possibilities. We’ll use the cheap single-function type of radio-controlled toy car—the type that continuously travels forward once it’s turned on until you actuate its remote control, causing it to back up and turn. You can modify the transmitter to a more compact size, and for use as an alarm trigger. You’ll also ...