This circuit was found in a 80s American documentation. The zener diodes determine the points of action of each stage and the transistors can be general purpose types.
The purpose of this circuit is to sense the water level in the windshield wiper reservoir. The circuit...
We found this circuit in Popular Electronics from January/February 1969. The circuit must be...
This circuit shows how to interface a CMOS circuit with a microcontroller or other circuit using an...