CircuitDigest breaks down everything you’ll need to complete this build, which includes electric motors, batteries, infrared and ultrasonic sensors to avoid obstacles, as well as an Arduino Uno ...

Morse code can be sent using low power, equipment built from simple materials or even using mirrors or flashlights. Finally, Morse code is a very simple way to do covert communications.

This cool system uses an Arduino board and home wiring to turn your local home telephone network into an intercom. When you take the phone off the hook it disconnects from the phone line and rings ...