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.
The search coil of this detector consists of 140 turns of wire 18 in an 8 inch diameter form. The...
This circuit was found in a 1989 documentation and was intended to be part of a presence...
In the figure we show a configuration for a crystal controlled overtone oscillator using a...