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Spy Bug FM Transmitter
Posted on Monday, October 29, 2018   •   Category: FM Transmitters

Spy Bug FM Transmitter

This tiny 88-108Mhz FM transmitter bug measures just 10mm x 17mm in size and as you can see in the photos the biggest components are just the microphone and the battery. You can use a small microphone from an older cell phones, they are small in size and have an excellent sensitivity. For an effective power supply the 9V battery (Duracell) is excellent and allows several hours of battery life, but if you want to have a smaller size it is better to use 2 or 3 lithium cells like the 2032 used in PCs. The circuit works well from 3 to 12V, the maximum range is obtained with 12V and a piece of 40-60cm cable as an antenna.

     28W Power RF Amplifier for FM Broadcast 88-108 MHz 2SC1946
     Stereo FM Transmitter with BA1404
     BH1417 USB FM Transmitter
     5 Watts FM RF Amplifier
     Stereo FM Transmitter with BA1404
     1.3W VHF RF Amplifier 2SC1970 88-108 MHz
     250mW FM VHF Transmitter
     Simple Miniature FM Transmitter
     Easy FM Transmitter
     BH1417 Stereo PLL FM Transmitter
Spy Bug FM Transmitter

 

Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]



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