This circuit works with the previous two by demodulating the signals received modulated in FM. The circuit is from the Radio Electronics magazine of December 1992.
This receiver can be used to receive signals from the previous circuit transmitter. The circuit is...
This directed coupled amplifier uses a transformer to drive a low impedance loudspeaker. This...
This circuit is from the time when cars used contact breakers. This 80's version measures the dwell...