This circuit was obtained in a 1968 manual of General Electric. The components used are of the time, but they admit equivalent. Observe the optical feedback system for control.
This powerful motor control was found in a Philips publication from 1970. The components are from...
The L coil of this receiver determines the received waveband. The circuit is from a 1963...
We found this circuit in a French technical documentation from 1982. The circuit can be...