This shield circuit was suggested by a 90s Popular Electronics. The circuit can use either a triac for a common load or a mechanical relay.
This circuit is from a 1979 publication, using displays of 7 segments of common cathode. The...
This is one of many zero crossing detector that can be found in this section. It was found in...
This circuit can be used in physics experiments, in ionization and in several other applications. The...