A simple fm radio transmitter circuit which covers frequencies from 88 to 108 MHz. It is built with 3 transistors: BC109, BFR91A and BFR96S. It is quite stable and the output power is around 200 mW.

When focusing on batteries, designers should use both highly efficient transmitter and receiver circuits, along with a well-disciplined protocol.

In 1896, Marconi successfully covered a distance of about 3 km using electromagnetic waves. A little later, he established radio contact across water between Lavernock Point, South Wales and Flat Holm ...

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.

For the first time, researchers have used a laser as a radio transmitter and receiver, paving the way for towards ultra-high-speed Wi-Fi and new types of hybrid electronic-photonic devices.

The transmitter was actually a pretty simple circuit, just a crystal-controlled oscillator and an RF amplifier really, but still managed about 1.5 Watts output on the 80-meter ham band.

There’s a big reason those enormous AM radio transmitter towers are surrounded in fences: touching them can be incredibly dangerous on account of the enormous amounts of power pushed through ...