Found in a 1967 Ferranti documentation, this circuit uses a LDR from that time as a sensor. Transistors can be replaced with modern equivalents.
We found this circuit in a Radio Electronics from October 1963. The circuit uses an output...
This circuit from an American documentation from the 70s, indicates a photodiode to generate...
This circuit uses components that are still common despite being from 1995 documentation. The circuit can...