3V Water-Level Detector


Posted on Oct 12, 2012

Originally, this circuit was used to sense a low-water level in a Christmas tree stand, but the circuit can be use


3V Water-Level Detector
Click here to download the full size of the above Circuit.

d as a water-level detector for pump controls, water sensors (for garden and lawn applications), etc. A comparator and probe setup with a Linear Technology LTC1040CN comparator drives a 2N3906, which switches a tone generator. Sampling occurs every 20 seconds, which minimizes current drain. A pair of dry cells will power the circuit for several months.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

lm2576 simple lab power supply electronic project
12VDC to 220VAC Inverter Circuit Using IC 555
Utility Power Supply
40W audio amplifier
16 Step Analog Sequencer circuit
Programmable Home Security Alarm System
Lift control circuit attached to the wall
Sound and light double control switch socket electrical circuit diagram
High-performance recording front end circuit



Top