I assume this is going between the +5 and the digital pin and the wire into the water?
Hi,I'm wanting to measure water in a tank. I've decided (for now at least) i want to go for a simple 'stick the wires in the water' setup rather than capacitive, or a pre-made sensor. I only need 4 depths. I'll only be taking readings every 10 seconds, and at most for an hour a day, so i'm not worried about electrolysis, especially at this stage of my project.I've read many posts on this forum but i'm still lacking a definitive understanding.Could someone advise me on the best circuit configuration for this?I'm thinking:1 wire to ground at the bottom of the tank.4 wires at varying depths connected to 4 digital pins on the arduino.Every 10 seconds check which pins are high.Is there a better way to do this? Or if the above is right, would i need any resistors at any point (very basic electronics knowledge here)Thanks,Elliot
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