PH metre » History » Revision 13
Revision 12 (Frédéric Blanc, 2021-04-11 10:55) → Revision 13/19 (Frédéric Blanc, 2021-04-11 11:15)
h1. PH metre h2. PH-4502C !clipboard-202104101846-oevts.png! *Po* Ph analog *To* Temp analog *Do* Trig digital !clipboard-202104101516-ovhks.png! h3. ADS1115 gain x1 (4.096V) <pre><code> ph=-5.7*(%value%/2^15*4.096)+21.34 </code></pre> https://www.e-tinkers.com/2019/11/measure-ph-with-a-low-cost-arduino-ph-sensor-board/ http://agregationchimie.free.fr/phmetre_arduino.php h2. DS18B20 Température !clipboard-202104111008-blrnr.png! correction en température du Ph !clipboard-202104111055-6t3ty.png! h2. TDS Total Dissolved Solids le TDS mesure en ppm les solides dissous dans l’eau. !clipboard-202104111106-vnamd.png! compensationVolatge=Voltage/1.0+0.02*(temperature-25.0); //temperature compensation tdsValue=(133.42*compensationVolatge^3 - 255.86*compensationVolatge^2 + 857.39*compensationVolatge)*0.5 https://wiki.keyestudio.com/KS0429_keyestudio_TDS_Meter_V1.0