Initially we build a transmitter and receiver to communicate between Arduinos using Morse code sent by pulses of light waves. Next, we consider digital music, which we create by switching a voltage on ...

The code for the Arduino transmitter and receiver sides is available at their github. Though there is no built-in error correction in the code, they have not had any issues.

This was simply an Arduino and a transmitter in the right frequency, loaded up with bit of carefully crafted code.

We may not to able to make a mobile phone system but our very own radio station with a transmitter and receiver might just be possible. What is a transmitter? Radio can be incredibly simple.

Renesas has announced a 60W wireless induction power receiver IC, compliant with WPC 1.2.4 and compatible with WPC 1.3+. Called P9418, it can also deliver up to 5W as a wireless power transmitter.