We found this circuit in the November 1985 issue of Radio Electronics magazine. It uses TTL technology and has binary inputs. The circuit must be powered by 5 V.
This basic circuit was found in the March 1998 issue of Electronics Now magazine. The circuit is...
This buzzer trigger can be used for small alarms. We find it in an 80’s American documentation. The...
This simple circuit was obtained from Popular Electronics in December 1990. The magazine no longer...