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 was obtained in an Electronics Now from the 90s. The circuit uses operational...
This circuit operates at a frequency around 1 MHz, having been found in a technical documentation from...
The TAA131 used in this circuit is not very easy to find today, but an equivalent low power audio...