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.
This automotive circuit was found in the September 1992 issue of Radio Electronics magazine. The...
This low frequency astable multivibrator use two probes in the simulation. The probes ar found in...
This circuit with zener diodes was found in documentation from the 90s. The zener diodes determine the...