This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power supply is made with 5 V that can come from the analyzed circuit itself.
This simple circuit tests both monophonic and other two-wire audio cables. The circuit is powered...
This integrated amplifier was found in a non-existent British magazine from 1975. The used...
This circuit was found in an old manual and can be applied to any operational amplifier. The power...