Additional (4th) Thermistor and External Mosfet on Duet 2 Wifi



  • Hey Guys,

    I want für use an additional Thermistor on my Duet 2 WiFi (RRF3). I already use all 3 available (Dual Extruder and Bed) and want to use an additional for Chamber Temperature Control.

    If I got it correctly I have to connect a resistor between 3.3V and Thermistor 3 (Expansion Header). The Thermistor has to be connected between VSSA and Thermistor 3.

    The value of the resistor should be 4700 Ohm but in theory the value should not matter because I can Set the value with M308 R... in Firmware, correct?
    I Plan to measure Chamber temps <60°C with a 100K Thermistor.

    Greets
    Max


  • administrators

    @MacNite said in Additional (4th) Thermistor on Duet 2 Wifi:

    If I got it correctly I have to connect a resistor between 3.3V and Thermistor 3 (Expansion Header). The Thermistor has to be connected between VSSA and Thermistor 3.

    Connect the resistor between ADVREF and Thermistor 3. The rest is correct.



  • Thank you!
    I'll do that.


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