This circuit is from the National Semiconductor's Linear Applications Handbook of 1994. The circuit can be implemented with equivalent operational. The detected voltage is given by the diode.
This circuit uses reed switches as sensors. We found it in a 1992 documentation. A float at a...
Found in Electronics Now, this circuit generates high voltage to charge a capacitor in an...
In the figure we have a Texas Instruments circuit for TTL interfacing using discrete transistors. The two...