Wireless Microphone Circuit Diagram. The mic section actually consists of a mini fm transmitter which is so small that literally it can be accommodated in a space of less a square inch and if its made using smd it could well be made within an area. The output impedance of the max4467 is low and well suited to driving cables over distances up to 50 m.
But it s not the best for such audio application as it gives average sound quality and have some noise in the signal. First generate high frequency oscillators. Point source audio microphones are compatible with many popular wireless microphone systems.
Resistor r1 resistor limits the current to the microphone element.
This wireless fm microphone is simple to build and it has a useful transmitting range over 300 meters in the open air. Which this transistor and a few parts around itself have 2 functions. Wiring for each of these wireless microphones can be found below. The electret microphone test circuit schematic is shown below.
