This is a typical circuit for an old microwave oven. We took it from an August 1973 Radio Electronics magazine, from an article that taught how to make repairs.
This circuit was found in a Raytheon transistor manual from the 1960s. The transistor is...
This circuit takes advantage of the noise generated at the junction of a zener diode of any type....
Found in an EEE from 1970, this circuit supplies a voltage of 12 V DC x 10 mA current from the...