This is exactly what I'm looking for for my own arduino project. I wish to monitor the draining and refilling of a large tub. All I need now is a temperature probe too.
The 'resistance' of water is so much more than the 1k resistors used, that the water 'shorting' them out is unlikely to make a significant difference, right?
I've used this technique too, but I had to use 100K resistors instead; and then too, the linearity was pretty shabby.
Here you see the resistors, in a serial configuration.
3 comments:
This is exactly what I'm looking for for my own arduino project. I wish to monitor the draining and refilling of a large tub. All I need now is a temperature probe too.
just a question:
is it ok for resistors to be under water?
Did this really work? With the values shown?
The 'resistance' of water is so much more than the 1k resistors used, that the water 'shorting' them out is unlikely to make a significant difference, right?
I've used this technique too, but I had to use 100K resistors instead; and then too, the linearity was pretty shabby.
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