This automotive circuit was found in the June 1997 issue of Electronis now magazine. The circuit uses a common operational amplifier powered by 12 V.
This circuit was originally recommended to operate with the emitter of the previous circuit but...
When the probes of this circuit meet water, the relay closes its contacts. The circuit is from a May...
The power supply shown can supply voltages of approximately 0 V to 12 V with a maximum current of 4.5 A,...