Water Tank Level Monitor

Overview

The probe's stacked sensors read the water height as a stepped analog value. The display maps it to bars and a buzzer warns before overflow.

Build Steps

1. 1

   Drop in the probe

   Fix the sensor board at the top of the tank with the probes hanging down to just above the base.

2. 2

   Wire the board

   Power it from 5 V and take the analog output to A0; keep the wiring away from pumps to reduce noise.

3. 3

   Map to bars

   Take the dry and full readings, then draw four or five blocks on the 16×2 LCD for the level.

4. 4

   Add the alarm

   Sound the buzzer when the level crosses your high threshold and stop it once it drops again.