Square wave oscillator as wire tracer

The tracer works by placing a square-wave signal on the line to be traced, The square wave is full of harmonics. small radio placed close ...

UHF Video Transmitter

This UHF Video Transmitter will radiate a UHF signal between 420 and 500MHz with aproximately 150mW Output. The range using a 35cm telesco...

Mini video transmitter

  This circuit transmits video signal to TV / VCR with a range up to 100 meters . R1 : 1K R2 : 680 R3 : 1K C1 : 10nF ...

Sensitive Field Strength Meter

Description: This Field Strength Meter is simple and also quite sensitive. It uses an ordinary digital voltmeter to measure RF signal stre...

FM Transmitter with Opamp

Circuit Of FM Transmitter with Opamp   Parts List: R1 4K7        R4 150K     R7 3K9 (2K7) R2 4K7        R5 220R     R8 120R (82R) R...

FM Radio jammer

Description. Circuit shown here can be used to jam FM radios in its vicinity. The circuit is nothing but a classic single transistor oscil...

USB FM Transmitter

Here's a simple VHF FM transmitter that could be used to play audio files from an MP3 player or computer on a standard VHF FM radio ....