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.
We find this circuit in a manual of the 80's own used components. The circuit provides an...
This simple guitar distortion effect was found in a documentation from the 90's. The circuit is...
This circuit was obtained from Hands-On Electronics, an American magazine of January 1987. The...