We found this circuit in a 1965 publication by General Electric. The zener is 8.2 V x 1 W and the table shows the capacitor values according to the number of cylinders in the vehicle.
The oscillator in figure 1 can be used in alarm, call or warning systems, producing a sound of...
In this circuit, the LEDs light up in sequence until the last one, when the end of the timing is...
This simple circuit, which appears elsewhere on this site, was found in a transistor manual from...