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 TTL circuit with a two-digit display provides intervals of up to 99 minutes, programmed in...
This circuit that can be used as a shield doubles the frequency of a square signal. The supply must...
Using the well-known CK722 and also the CK721, this signal follower or tracer was found in Radio...