This circuit detects when a powered circuit suffers a malfunction, lighting an LED. The supply voltage can be changed according to the monitored load.
This circuit was found in a 1985 English magazine, but it can still be easily assembled, as the...
This circuit was found in documentation from the 90s. Its purpose is to dial a programmed number...
We found this circuit in the January 1997 Electronics Now magazine. The triac determines the...