This circuit was found in Motorola documentation from 1968, using high power transistors and operated at 580 Hz. The circuit employs a special transformer.
This circuit is from an ancient American documentation. The coil is frequency dependent and the...
Found in an 80's Elektor, this circuit can control loads up to 750 mA with the BD139 and 100 mA...
This circuit converts negative logic signals to positive logic signals. We found it in 1969...