DIY FM BUG (DIY Radio Transmitter)

Homemade mini fm transmitter that work from 3v to 12v dc,range depends where is used from 50m to max 200m.

Electronic components:

- Solid Gauge # 18 Wire
- Electret Microphone
- 2N3904 NPN Transistor (2x)
Capacitors:
- 15pF or 40pF Trimmer Capacitor
- 100nF Ceramic Capacitor (2x)
- 10nF Ceramic Capacitor
- 4pF Ceramic Capacitor
Resistors:
- 1M Ohm ¼w Resistor
- 100K Ohm ¼w Resistor
- 10K Ohm ¼w Resistor (3x)
- 1K Ohm ¼w Resistor
- 100 Ohm ¼w Resistor

[franknieledeoliveira]

Muito legal, montei muito desses transmissores FM, a alguns anos passados. totalmente elaborados aqui, também alguns que eram kits e outros anexos de revistas eletrônicas, fiz alguns miniaturizados usando bateria 12V controle remoto e CR-2032, e microfones de eletreto miniaturas retirados de sucata de microcassetes.

[mikepanchaud]

This is how i listened to cds in the bath, in the 1980s, on a cheap waterproof radio.

[davidharmon]

I am probably doing something wrong.sorry about that.i will try re moving medsage.

[eddyyu]

Sir, can you tell me the diameter of the coil and the thickness of the coil wire here ?

[loueckert]

Fun, interesting, thanks for posting. Very easy I would say 73 KT1R

[eddyyu]

Or the SWG no. of the wire of the coil ?

[Pippo.Langstrumpf]

Very illegal content, but interesting.

[edwinov]

What frequency will it transmit at, and can the frequency be adjusted?