Found in an old American documentation this FM modulator makes use of a varactor diode. The circuit can be easily implemented given the small number of components used.
This circuit, for a bulb of 6 V up to 200 mA, was found in an old Argentine publication of the...
We found this circuit in an old American documentation. The circuit can be applied to modern...
This low Power output stage can source a fraction of watt to a small loudspeaker. The transformer...