Found in a Motorola's 1968 documentation, this circuit operates at 16.5 kHz. The output is 5 A. The transistors are from the era, admitting modern equivalents.
The basis of this circuit is the 723, an old integrated circuit not easier to find these days. The...
This circuit was obtained from a 1967 General Electric manual. The circuit uses components of the time,...
The thermistor used in this circuit must have a resistance at room temperature between 10 and...