The purpose of this circuit is to improve a trigger circuit using a zener diode. The circuit was found in an American documentation from 1964. It can be improved using equivalent modern components.
This old circuit for circuit breaker cars was found in a 1963 publication. The transistors are...
Several circuits similar to this one can be found on our website. This is from an internet...
The circuit of the figure can provide voltages of 5, 8.9 and 12.5 V at its output, all doing this...