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.
Published in 1988 in Hands-On Electronics, this circuit converts the 12 V of a battery into 120 V...
This photoelectric circuit from a 1960 publication uses a 6.3 V electromechanical counter, common at...
This circuit consists in a capacitor bridge for capacitance measurements. The circuit can be...