This circuit was found in a 1964 documentation. It shows how to achieve automatic gain control for an oscillator. The transistors are of the time and the circuit controls signals from 2.6 to 3.1 kHz.
February 25, 2015 - Mouser Electronics, Inc. today announced their new Robotics Technology site....
In the figure we show a simple way to use a zener diode to protect a load against overvoltage. The...
The sound produced by this circuit, from a 1978 publication, depends on the humidity between the...