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.
You can download the Gerber file of this PCB from here:
https://www.pcbway.com/project/shareproject/Water_Level_Indicator_With_Anti_Corrosion_Feature.html
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
Watch this Video for more Details:
