- #1
buzachaka
- 16
- 0
I am a ecologist and I have been playing around with a water conductivity sensor, however in seawater there is the obvious oxidation issue. I have found that with the right correction factors and with the polarity frequently reversed, the electrodes have reasonable accuracy.
The Question: Is there an crossover circuit, that can be controlled by a microcontroller, that would allow the power circuits to be flipped. I am running 5v DC.
The circuit would normally be like this,
5VDC In (+)----------------- - ----------- (+) 5VDC Out
Grnd In (-)------------------ - ----------- (-) Grnd Out
The dashed lines represent the existing cables, the 'out' are the plates of the electrodes.
And when crossed over,
5VDC In (+)------------------ \/ ----------- (-) Grnd Out
Grnd In (-)------------------- /\ ----------- (+) 5VDC Out
Basically, I need to flip the polarity of the electrode plates.
Because of the equipment, there is no way to use AC and the switching needs to be at low frequency to allow reading to stabilize.
Any suggestions? I've searched and am having no luck.
Cheers.
The Question: Is there an crossover circuit, that can be controlled by a microcontroller, that would allow the power circuits to be flipped. I am running 5v DC.
The circuit would normally be like this,
5VDC In (+)----------------- - ----------- (+) 5VDC Out
Grnd In (-)------------------ - ----------- (-) Grnd Out
The dashed lines represent the existing cables, the 'out' are the plates of the electrodes.
And when crossed over,
5VDC In (+)------------------ \/ ----------- (-) Grnd Out
Grnd In (-)------------------- /\ ----------- (+) 5VDC Out
Basically, I need to flip the polarity of the electrode plates.
Because of the equipment, there is no way to use AC and the switching needs to be at low frequency to allow reading to stabilize.
Any suggestions? I've searched and am having no luck.
Cheers.