Activity Forums Questions & Troubleshooting Software & Firmware Analog Input Wrong Reading

  • Analog Input Wrong Reading

     Lukas updated 1 year, 9 months ago 2 Members · 4 Posts
  • mosheash

    Member
    May 26, 2019 at 6:38 am

    Hi there

    lately, I purchased some controlling mini

    i have a big problems when i working with the analog pins…..

    I connected a current sensor into A0

    when I read the Bits from the screw terminal i receive a very different result than the header pin

    in the header pin, the readings are correct about 100 bits(from 1023) per the voltage i supplied

    in the screw terminal, the reading to the same voltage was about 15 bits (from 1023)

    can anyone tell me what i am missing?

  • Lukas

    Member
    May 27, 2019 at 11:45 am

    Hello Moshe,

    please check our block diagram of the Analog/Digital INPUT here. There are some dividers in the path from the screw terminal.

    Best regards,

    Lukas

  • mosheash

    Member
    May 29, 2019 at 10:42 am

    Thanks for your help

    is this means that in low voltage inputs the resolution is affected?

  • Lukas

    Member
    May 29, 2019 at 11:37 am

    Hello,

    this means that value 1023 (100% of the resolution) is:

  • 5V at pinheader

  • 12V at screw terminal when the device is powered from 12V

  • 24V at screw terminal when the device is powered from 24V

  • Is it clear now?

    Lukas

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