FM Transmitter Module Kit Adjustable Wireless Microphone Board Frequency PCB Board for Electronic Information Engineering

Highlights

• Adjustable Design: This circuit board carries a microphone can also be external sound, adjust the volume potentiometer can change the volume size, adjust the adjustable inductor can change the frequency between 88‑108MHZ any frequency point.
• Three Stages: The circuit adopts the base frequency signal, frequency doubling amplification, the last stage of high frequency amplification of three levels, open space transmitter distance is better than 100 meters.
• Frequency Doubling Circuit: The frequency doubling circuit makes the frequency more stable and reduces the trouble of frequency variation brought by human body induction.
• Multi Purpose: FM transmitter module kit is suitable for electronic information engineering, high frequency electronic circuit experiment and test.
• Frequency Range: Adjusting the inductor can make the base frequency signal in 44‑54MHZ, using the nonlinearity of the transistor to produce 2x frequency signal 88‑108MHZ.