This circuit can be used as an answering password system in a store, office, or other location. The circuit is from Intersil using components of the time. The circuit is from the 80's.
EDN magazine in a 90's issue published this TTL technology debouncer flip flop circuit, in this...
Found in a 1968 Novel Electronics Circuit, this circuit compares two light intensities using...
This circuit may be used in IF steps of dual-conversion receivers, i.e., a type of receiver that uses...