Found in na 1980’s English magazine, this circuit produces a strong modulated tone reproduced on a speaker. The power MOSFET can be of almost any type.
This 10-transistor radio was found in Radio Electronics magazine from December 1964. The...
In the figure we show how to implement a voltage-controlled oscillator. The circuit is from Texas...
This circuit generates signals from 0.01 Hz to 10 kHz, but uses unusual components today. The...