This circuit with transistors of the time was found in the November 1972 Radio Electronics magazine. The circuit also generates a sawtooth signal for use on an oscilloscope.
We find the original version of this circuit in an English publication (1986). It is a...
This circuit is from a 2000 publication with the purpose of protecting a three-phase circuit by...
This simple power supply for transistors was found in documentation from the 1940s. The...