This used to show the level of water.
Step 1: Make PCB and Frame
I used acrelic and universal PCB, and painting with black doff pylox.
Step 2: Skematik
Using this skematic, and how its work, look at the picture
Step 3: Build Your Project
Build your project, as show in Schematic.
Step 4: Calibration
Tested and calibration
Step 5: Finish
Ready mounted on Wall
Step 6: Complete Source and Project
Download this Full Project