This circuit limits the intensity of an audio signal from a control voltage. The circuit is from a 90’s Radio Electronics. The coupler is a type that uses LDR.
This circuit was found in Radio Electronics from the 90s. The transistor is for general use. The...
When the temperature rises above the value adjusted by P1 the relay triggers on. The rated voltage for the...
This circuit was found in a 1987 publication. A 4017 sequentially counts time in steps set by...