This is a very common circuit in the days of xenon flashes for cameras. This is from a Radio Electronics magazine from November 1965. It uses an SCR and has manual triggering.
This circuit activates a relay after a time given by C1 and R1. The circuit is from a Radio...
This circuit can be used as a control shield for microcontrollers of all types. The supply is made...
In this circuit, D.A. which is actually O. A. of an operational amplifier, which can be any type...