6 V x 5 mA regulator (CB21537E)

This 6V regulator with FET was found in an old Electronic Design. FET and transistor admit modern equivalents.

DC Motor Control (CB15610E)
DC motors of 6 to 12 volts and currents of up to 2 amps can be controlled with this circuit. The...
Wiretapping Amplifier (CB19339E)
This is an amplifier that uses a pickup coil placed next to the telephone set and the listening is done in...
Function Generator (CB14859E)
This circuit was found in a French documentation from the 80's. The circuit must be powered by a...