This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
We found this circuit in a 1977 publication. With it we can test general purpose operational...
Lamps in the range between 20 and 50 mA can be used. Voltage supply is according the lamp and...
This 100 kHz crystal controlled oscillator was found in an American 1980s documentation. The...