Sound Flash Trigger (CB5443E)

This circuit is from an old American documentation. In it we have a simple way to fire an SCR from a sound beep. The amplifier is low power, 1 W max.

Epson SG 8018 Crystal Programmable Oscillators
Epson SG 8018 Epson Crystal Programmable Oscillators Available from Mouser Electronics, these...
Electronic Cricket (CB795E)
When the lights turns off this circuit will produce a sound like a cricket. When the lights are...
Limit Comparator (CB5086E)
This circuit appears elsewhere on the site. The circuit shown is from an American 1980s...