This circuit was found in Motorola documentation from the 1980s. The components are of the time, not currently common as operational and opto receiver.
We found this circuit in the August 1994 issue of Electronics Now. The 4046 is unusual today. The...
This signal conditioner humidity sensor was found in a 1980s Linear Technology documentation. The circuit...
The battery is charged by the photocell that keeps the low consumption beacon in the dark. The...