This circuit was obtained in a Hands-On Electronics from the 90's. The circuit turns on one LED at the end of the timer, erasing the other. The timing can be increased by increasing C1.
This circuit can be used as an answering password system in a store, office, or other location....
This circuit serves to reinforce the AM band signals for receivers that use an external antenna. The...
This circuit was found in the September 1997 issue of Electronics Now magazine. The circuit uses...