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.
Found in a 90s R-E Experimenters Handbook, this circuit amplifies signals from 100 Hz to 3 MHz....
The gain of this amplifier is given by the 120k resistor, which can be changed depending on the...
This sensor circuit for a small robot was found in a Popular Electronics from the 90s. The circuit...