Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water.
New to EnviroDIY? Start here

Reply To: PH Sensor Issue

Home Forums Environmental Sensors PH Sensor Issue Reply To: PH Sensor Issue


    Sorry for the late answer I had some stuff to do.
    Okay so, the circuit is connected like this:

    Voltage: V+ which is the 5V DC connected to SW5
    Ground: Ground to Ground
    Analog = PO or PH analog output is connected to the Analog pin A0
    I used three resistors to test which one will be close to the voltage required, I will post a picture of the three of them.
    The voltage output I get from your code displays more than 5V, I can’t calibrate it to 2.5V that way.
    The circuit is guarantee is properly connected.

    Also you have been helping me out a lot, I appreciate it.