Found in the June 1987 issue of Radio Electronics magazine, this circuit uses well-known CMOS components. The circuit has a CMOS amplifier stage that drives a small speaker.
This simple multitester tests continuity, semiconductors, leaks, and other common component...
This configuration can be implemented with equivalent operations. The circuit is from the 1990...
This circuit is one of many that we have in our section. It was taken from the Electronics...