This series of projects explore concepts of radio communications. We use LEDs to generate (very high frequency) radio waves and photo-resistors to take the place of radio antennas. These ideas are ...

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.

Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have, for the first time, used a semiconductor laser to send and receive radio signals. The hybrid ...

AM radios are relatively simple devices, and building one is a good way to start exploring the world of radio communications. [GreatScott] does exactly this in the video after the break, building b… ...

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.

The chances are that many of you will have made an FM “bug” style transmitter, a simple one-transistor oscillator usually driven by a small electret microphone. It’s also relative… ...

When problems did occur, it was usually with excessive second or third order harmonics, which often boiled down to misaligned or lightning-damaged harmonic traps in the transmitter. For FM stations, a ...

The industrial, scientific, and medical (ISM) radio frequency bands find common use in electronics systems, by virtue of their comparatively lightly regulated nature versus (for example) spectrum ...

The sound of the transmitter picked up by the radio was a little indistinct a sort of rasping buzzing sound and very feeble. In addition, because the radio was not tuned, it picked up other radio ...