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 second amplifier is based on the integrated LM108 and has a differential input. The resistor...
This circuit was found in a 1968 Motorola documentation. The circuit can be implemented with...
Nothing more useful on the bench than a variable voltage source. This is the source we found in...