Suggested by Motorola in 1968 documentation, this circuit has an efficiency of 70%. Power transistors are types of the time as are transformers.
This sensitive touch circuit that triggers an oscillator uses only transistors. The circuit is...
This circuit was found in a 1967 EEE. The components are from that time, but the circuit can be...
This circuit of two transistors was found in a Japanese magazine in 1967. The transistors are made...