3V Water-Level Detector

  
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 - schematic

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.



Recommended videos


  • water level detection for overhead tank
    Duration: 5:30.
  • How To Make A Water Level Indicator
    Duration: 7:53.
  • EEVblog #490 - Peak Detector Circuit
    Duration: 35:03.

Leave Comment

characters left:

New Circuits

.