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Teach you to make a simple 1.5V frequency modulation wireless microphone
Date:2021/10/18 21:55:57 Hits:
The production of 12 components made a micro-wire faster microphone, the operating frequency is stable, and the transmission distance is about 30 meters, and the 6V supply can reach more than 100 meters. As shown in the figure below, the BG1 and C1, C3 constitute a high frequency oscillation circuit. The transmitting distance is related to the operating current of the transmitting tube, and the upper bias resistor R2 can change the BG1 output current. When BG1 is selected, the FT of the tube must be greater than 300MHz, but the FT is too high will affect the modulation. The inductance L is divided into two coils to wind, but the winding must be the same, L1 is 0.5mm enameled wire in diameter 5mm skeleton , L2 around 3. The antenna can be used with a 0.6-meter-long soft wire.
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