This is an another technique to make an stable FM transmitter using LM2936 voltage regulator IC. The stable FM transmitter circuit mentioned before was using a 5V zener diode to provide accurate voltage to the oscillator due to which the transmitter becomes frequency stable. This is
an another technique to make an FM transmitter stable by using a regulator IC. The circuit is using LM2936-5.0 IC which is a fixed 5 volts low dropout positive voltage regulator. This IC provides stable 5 volt to the transmitter till the battery runs down to 5.2 volts. Use 12 inch wire antenna with the circuit. For more range use 30 inch antenna or use diy fm antenna for achieving long range with this circuit.