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.
Found in the August 1994 issue of Electronics Now, this CMOS circuit uses the 4046, which is...
This super metal detector uses three coils, operating in differential form with two transmitter and...
aaa The circuit shown generates 100 kHz signals for calibrating the scale of a receiver in 100 to...