This circuit was obtained from Dutch documentation from 1967. It uses transistors of the time which can be the BFY50 and 51 for the output and the BC series for the others.
This circuit was found in American documentation from the 90's. The circuit applies to any...
This circuit was obtained from an American documentation from 1976. The circuit can be adapted to...
This circuit was found in a 90s Popular Electronics. Both the coupler and the MOSFET can be of any...