This power supply uses a Raystor which is a 1964 LDR lamp coupler. The circuit was found in an Electronic Design and the transistor can be replaced with the current equivalent.
This circuit was found in a Popular Electronics of the 1990s. The sensor is a rotating mechanical...
With this circuit it is possible to obtain an intermediate voltage of 6 V from a 12 V battery with...
Found in a 303 Circuits from the 90s, this circuit converts signals from the 10 kHz to 150 kHz...