This circuit from a Radio Electronics from October 1965 shows how to obtain the action of an SCR when triggering a relay using two transistors. The relay is according to the circuit supply voltage.
This circuit switches the brightness of the LED. We found it in an English documentation....
The circuit shown in the figure triggers a relay when S1 is pressed, but this only in the absence of...
This astable multivibrator is one of the many configurations that we have in this section and on...