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ADC reading frequency in 32 channel USB GPIO

Discussion in 'GPIO Modules' started by Khor Boon Pin, Jan 7, 2016.

  1. Khor Boon Pin

    Khor Boon Pin New Member

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    hi all
    I have 7 photocell connected to 101 to 107 input ( connected to 10k resistor ) , with supplying voltage 3.3v , I always saw the voltage spikes in the reading ... what is the recommendation on the frequency to read the ADC input ?
    the 32 usb Numato was access by node-red serial port modules and pump the data to mqtt broker .
     

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  2. GaryDoug

    GaryDoug New Member

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    I am also interested in this specification. What is the response time for the A/D conversion? I also need the spec for the 8-channel version. Is there no one to answer?
     
  3. admin

    admin Administrator Staff Member

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    Sorry for the very very late reply,

    The recommended conversion rate is one conversion every 20 - 50ms or so. It can be faster but the rate should be adjusted to suit the needs of the application. We recommend averaging a few samples to smooth out the glitches that can be caused by different environmental factors.

    Thanks,
    Tom
    Numato Lab
     

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