Posted on Thursday, August 25, 2011 • Category: FM Transmitters
This miniature transmitter is easy to construct and it's transmissions can be picked up on any standard FM receiver. It has a range of up to 1/4 of a mile or more. It is great for room monitoring, baby listening, nature research, etc. L1 is 8 to 10 turns of 22 gauge hookup wire close wound around a non-conductive 1/4 inch diameter form, such as a pencil. C4 is a small, screw-adjustable, trimmer capacitor. Set your FM receiver for a clear, blank space in the lower end of the band. Then, with a non-conductive tool, adjust this capacitor for the clearest reception. A little experimenting and patience may be in order. Most of the parts' values are not critical, so you can try adjusting them to see what happens. BH1417 USB FM Transmitter 76-110MHz FM Radio Transmitter 28W FM Broadcast Transmitter Amplifier 88-108 MHz Mini FM Radio Broadcast Transmitter 25W RF Amplifier 50mW FM PLL Transmitter SD USB MP3 Player 1W Long Range FM Transmitter Simple MP3 FM Transmitter FM Transmitter Circuit Miniature FM Transmitter
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