I made a pressure monitor that reads the water pressure in my house at the hot water drain valve.
The sensor is:
It takes 5v power, ground, and outputs .5 - 4.5 v based upon the pressure.
I took power directly from 5v and Gnd on the r4 and the output is connected directly to A0.
After a few hours of successful use, the sensor is now toast- only outputs a solid 4.5v no matter what pressure.
Should I use a current limiting resistor on the 5v power to the sensor, or a current limiting resistor on the output going into A0?
The sensor only pulls 2mA when in circuit.
I am hesitant to throw a new sensor on this as it did work great for a few hours, and perhaps I need to modify the circuit before the next sensor fries.
I’ll check in the morning.
It is a solid piece of stainless with just a tiny hole to detect pressure. I don’t think it is maintenance friendly but I’ll blow it out with compressed air.
Came down with covid yesterday so I don’t feel like doing much now…
My concern is that I am supplying 5v to the sensor from the arduino 5v pin without any current limiting resistor. I measured 2 mA of draw so I think this should not be a problem, but this is my first arduino project and wanted some assurance that I am not going to ruin the next sensor I wire up!
