This circuit is a Water Level Indicator With Anti-Corrosion Feature !!
In this circuit i used some wires with different lengths to detect the water level.
But to avoiding Electrolysis Corrosion we have to using AC voltage instead of DC voltage,
To do that i used IC NE555 to generate a low AC voltage.
I explained that in this video: https://youtu.be/wrMyt4tC5oQ
To order this PCB first go to the website link below, Then click "Add to card" then select the PCB color and quantity then click "Submit" and after few minutes when review completed by the engineers, you can pay for it by clicking on "Proceed to Checkout"
https://www.pcbway.com/project/shareproject/Water_Level_Indicator_With_Anti_Corrosion_Feature.html
Parts List:
IC NE555
Red LED (4pcs)
Green LED (4pcs)
Red LED (4pcs)
Yellow LED (6pcs)
Resistor 33K
Resistor 1.5K
Capacitor 100nF (9pcs)
Capacitor 1nF
Circuit:
VCC=12V
Video:
