This circuit was found in General Electric documentation from the 1980s. The circuit is intended to receive 50 kHz modulated optical signals. The components support modern equivalents.
The circuit shown has the advantage over the reductions with resistors to have a much higher...
This circuit uses a switch to select the direction of rotation of a DC motor. It was found in the...
Found in American documentation, this circuit can make use of modern equivalent transistors. The...