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.
Miniature FM Transmitter PLL FM Transmitter using LMX1601, ATtiny2313 AT90S2313 5 Watt FM Amplifier Simple FM Transmitter USB Mono FM Transmitter FM Telephone Transmitter Simple FM Transmitter 1W Linear FM Transmitter Booster with 2N4427 BLF147 150W VHF Amplifier 1.5W VHF AmplifierCircuit-Zone.com © 2007-2026. All Rights Reserved.
