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.
This series sensor circuit is from 1995 Popular Electronics. The circuit can use any SCR and the...
This reinforcing stages from a 1960s documentation. No information is given about the transformer...
This circuit was obtained from an American 1980s documentation. The frequency depends on the...