This circuit makes use of a stroboscopic tube, a component that no longer exists today. The circuit is from the 70's and can be adapted to use mains voltage.
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...