Simple Miniature FM radio transmitter

555

08:44:42

Minimal components FM transmitter. The AC source should be an electret microphone. Fit the antenna on the rightmost node between the coil, collecter and cap. I used two 2N3904 transistors. I just build it on my breadboard and it works fine, my tuner is set somewhere around 92 MHz, just remember it's a MINIMAL FM transmitter. ;) 

published 10 years ago

thebugger

10 years ago

Yes, as simple as it may be it may work. Although i should warn you, these things are very unstable and harmonic rich. Even your presence will cause the oscillator to shift if not properly shielded. The frequency constantly drifts and jams the whole FM spectrum. Moreover the oscillator itself won't get you much range, you must add a resonant antenna.

Neeh

10 years ago

Check. I noticed. :)

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