This circuit simulates the signal produced by a muscle, serving to adjust medical equipment. The circuit is from the 1968 Mullard. Transistors support modern equivalents.
The integrated circuit used in this 1987 project is not very common these days. However, if found...
The output voltage of this circuit is approximately four times the supply voltage. The circuit is from...
This circuit for shunt motors was found in an American 1980s documentation. The SCR should be rated...