USB Mono FM Transmitter

This small FM transmitter with a range of about 50 meters designed for connection to the USB port.With lots of mini-transmitters then you have a comprehensive,action-packed radio program.Due to the power supply via the USB port of a high frequency stability is achieved.Alternatively,the receiver,a battery 5 to 12 volts to operate.

FM Transmitter Construction:

USB FM Transmitter Prototype It is not necessary to drill the transmitter PCB.All components will be soldered to the plate with their legs folded,like this:
The two transistors and the LEDs are polarized:
The transistor has a flat side,the LED a foot longer than the other is the anode (A),the other is the cathode (K).The audio cable (minijack) must be transformed from a stereo cable into a cable.

Mono Sound:

Soldering together the white and red cables,leaving aside the yellow cable (mass).The frequency setting will be turning the variable capacitor gently with a screwdriver or thin cardboard but rigid.

FM Transmitter Parts List:

Filed Under: Radio