This time, [Afroman] explains how frequency modulation works while building up a short-range FM transmitter on a board he has available at OSH Park. The design is based on a MAX2606 voltage ...

After flying and crashing a cheap FPV drone for a bit, [GreatScott] decided to try his hand at building his own video transmitter ... 2.4 GHz VCOs and built a short range (20 cm) WiFi jammer.

In many cases the short range can limit the effectiveness of this technology, even in spaces as small as a vehicle interior. Most phones with an FM transmitter allow you to choose the frequency ...