PH probe
a pH probe to measure a solution alkalinity or acidity
the probe driver
card calibration
short the nozzle...
act on trimmer
until we have a 2,5 volt tension in output
probe calibration
prepare a known  PH soluiton
then measures PH
compute the "corrective"
and insert it into program
check now the PH of the solution
6,87 versus 6,86; good
ok, let's try
distilled water to clean probe
beer
liquid soap
wine
schematik, sketch and notes on youtube description
