Mini FM Transmitter This circuit rsu I found on the internet, it works very well is aa very simple so that construction can handle each and how big an amateur. Parts I managed to squeeze the plate 1,5 x 2 cm. This aspect encourages rsu the use of transmitters such as tapping bugs. When using the wire antenna and power supply 3V range is 50m. The coil has 10 turns at a diameter of 3 mm and a coiled copper wire of 0.3 mm. The microphone is an electret (+ pole him to recognize by the fact that the solder pad on the rear side does not unlike minus, which is connected with a metal sheath). Transmitting frequency is changed by stretching of turns. We can also change the frequency by changing the capacitor C2 see program to calculate the resonant frequency. (Values rsu for the unexpanded coil with a capacitor in Figure 10p a frequency of about 88MHz, 95Mhz with 8.2 p, 6.8 p 104MHz,) tuning to the correct frequency through the coil. The whole I then washed epoxy and place the microphone I put 3.5mm jack so I can stick to the Walkman and stream music from a tape, but I did not prepare the possibility of eavesdropping, I soldered a microphone to counter :) O power cares 3V button battery . The author warns against the building, the transmitter begins to oscillate very reluctantly or not at all. I prefer to drop this uncertain enterprise. DPS party connections
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