This very low power circuit is based on the ICL7860. We found it in an Electronics Now from April 1995. The output current is very low.
This circuit is from Radio Electronics. The magazine no more exists, but the circuit can be...
Found in a 1990s US publication, this alarm circuit detects when a light beam is interrupted. Optical...
This telephone circuit was found on a 90's EDN. It keeps a flashing LED to indicate that there was a...