5874E)
This circuit uses an optocoupler to switch a load on the power grid. The circuit is from Electronics Now magazine, July 1995. The CA3059 is not common today.
This circuit consists of a bass filter that can be used as a subwoofer in a sound system. The...
This 7400 TTL circuit has a memory, keeping the LED on when a pulse is detected. The circuit must be...
This circuit for alternating current was found in a 1965 General Electric documentation. The...