This single trigger circuit has been indicated for photography applications. The circuit is from a 1964 Electronics World. The transistor is general-purpose and the SCR can be of any type.
Found in Popular Electronics this circuit will trigger a buzzer if the ignition key is removed...
Found in Popular Electronics, this sophisticated short-wave receiver requires a lot of skill from...
This circuit is from an old American documentation using LEDs in the rectification. The circuit...