We found this light relay circuit in year 2000 documentation. The relay is 6 V and the circuit includes a power supply. It can be used to control various devices from the incident light in the LDR.
This symmetrical configuration uses two operational amplifiers to obtain the rectification of a...
Found in an Electronics World of 1966 this circuit is intended for use with a microphone as an...
This oscillator generates a signal of approximately 400 Hz, which has its symmetry adjusted...