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    Extra thermistor reading

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    • dmkmediaundefined
      dmkmedia
      last edited by

      is there any way to get an extra thermistor reading
      i have 2 hot ends and 1 heated bed all working fine but i also have a water cooler i would like to monitor the temp of.
      of i use a thermistor in the water is there a way i can take the reading via the board

      https://dmkitservices.com

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      • dc42undefined
        dc42 administrators
        last edited by

        Use M305 to create a named virtual heater. I guess we could use a wiki page about this, but I haven't time to right one at present. Any volunteers?

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • dmkmediaundefined
          dmkmedia
          last edited by

          so reading up do i need another board to do this or can it connect direct to the duet wifi board somehow

          https://dmkitservices.com

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          • dc42undefined
            dc42 administrators
            last edited by

            If you have a spare thermistor connector (E1?) then you can connect it to that.

            Duet WiFi hardware designer and firmware engineer
            Please do not ask me for Duet support via PM or email, use the forum
            http://www.escher3d.com, https://miscsolutions.wordpress.com

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            • dmkmediaundefined
              dmkmedia
              last edited by

              no i am using 2 extruders and a heated bed

              https://dmkitservices.com

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              • DjDemonDundefined
                DjDemonD
                last edited by

                You can connect to the expansion connector H3-7 but you need a reference resistor to do so. If I get chance David I can do a wiki page for you I have probably every type of heat sensor setup except thermocouples.

                If you don't want to use the expansion connector then the best bet is to use pt100 sensors this frees up the thermistor inputs for "extra" temp sensors.

                Simon. Precision Piezo Z-Probe Technology
                www.precisionpiezo.co.uk
                PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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                • dc42undefined
                  dc42 administrators
                  last edited by

                  As DjDemonD says. If you want to add an additional thermistor, connect it between your chosen thermistor input on the expansion connector and VSSA. Connect a 4k7 1% reference resistor between the thermistor input and ADVREF.

                  Duet WiFi hardware designer and firmware engineer
                  Please do not ask me for Duet support via PM or email, use the forum
                  http://www.escher3d.com, https://miscsolutions.wordpress.com

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