This circuit can keep a set of lamps on for up to 1 minute, time given by C2 and R2 that can be changed. The load depends on the relay. The circuit is old, from 1988 documentation, but totally viable today.
Wired to the output of any amplifier this circuit makes an incandescent lamp flash according the...
Found in a 90s documentation, this circuit triggers the SCR when there is an overvoltage in order...
This setting appears elsewhere in this site from other sources or projects. Instead of the lamp...