Hi
I've made a barebone arduino running on two AA batteries with wireless communication.
Now I want to add a water level sensor to my sump in the basement but I'm looking for some low voltage solution. Either Ultrasonic or IR or perhaps some other solution.
I can easily make it if I step up to 5V, but then the battery idea is dead.
I could also do it with a DC booster, but then I also need levelconversion.
If I use a capacitive sensor I would need a temperature sensor as well and don't know if it would be good enough.
Resistive sensors are tended to corrode.
The sump is less than one meter and it is groundwater. I would like to measure the waterlevel and also have a highwater sensor.
So what whould be a good low voltage solutions? anoyone solved it?
You could try a pressure sensor like my washing machine: A vertical tube, open at the bottom, closed at the top with a gage pressure sensor (relative, not absolute). As water comes in the bottom of the tube, pressure within the tube rises. You can probably find a 3.3v pressure sensor.
Thanks. not thought about this.
But its not easy to find cheaply.
Should it be analog or ratiometric output?
i guess the range should just be 0-20kPa?
Aren't these sensors just dump analog devices? I'm thinking does it just output as percent of the supply voltage so running on lower voltage just gives lover output?
So you would do something like this?
Should the caps be identically or can the ref cap be smaller?
And would it just be (level sensor/ref sensor) and then map the values to get the dept?
