Based on the CA3161 and CA3162, this circuit was found in the July 1990 Radio Electronics magazine. The circuit is two digits only.
This simple CMOS touch switch was obtained in a 1987 publication. All components are common and the...
This circuit is from a current regulator up to 1 A, ie a constant current source. The LM320...
Found in a Popular Electronics from the 90s, this circuit reaches 100 kHz and battery power is...