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 is more sensitive than the previous one, in the sense that we can use weaker and more...
The purpose of this circuit found in an old Elektor is to light a lower power lamp when the bigger...
Obtained from a 1996 documentation, this circuit uses common components and has a voltage gain of 200...