Simple FM Radio with improved audio gain
Audio circuits

Simple FM Radio with improved audio gain

By internum


Very simple FM Radio circuit using only one transistor.

Simple FM Radio with improved audio gain circuit
Simple FM Radio with improved audio gain circuit

L1:
Wind 6 turns of solid wire on a pen or pencil that is just under 1/2 inch in diameter. Remove the wire from the pencil and spread the winding to make a length of 3/4 inch. Solder C2 somewhere near the middle of the coil.

9176 28 August 2007

See also:

16 Watt Amplifier
16 Watt Audio Amplifier uses two LM383 IC.
18-bit ADC uses PC's serial port
A PC usually requires a plug-in ADC card to process analog signals. However, with this circuitry, a PC can communicate with an 18-bit ADC through its serial port.
Audio Indicator
This circuit can be used to remotely monitor a loudspeaker, alarm, or audio source for presence of an audio waveform. It can also be directly connected across loudspeaker terminals used as a peak indicator.

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