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Applying a Sensor Output Analog voltage to a microcontroller

Discussion in 'Sensors and Actuators' started by firstoption, Feb 20, 2015.

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  1. firstoption

    firstoption

    9
    1
    Mar 8, 2014
    Good day to all,
    Please I need help on how to get a stable 5V to my microcontroller. I want to convert the Output analog Signal from a sensor to digital Signal using the ADC peripheral in a microncontroller.According to the datasheet of the sensor,the Output voltage analog Signal has a range of : 0 to 5/10V. This means that the sensor can Output 0 to 5V OR 0 to 10V. My question is that is there a chip that i can use(or construct a small circuit) such that when the sensor Outputs 5V,I will get 5V from the Output of the chip and in case the sensor Outputs 10V , I will still get 5V from the Output of the chip.The constant Output voltage of 5V is important because my microcontroller maximum operating voltage is 5V.
    I would be very grateful if somebody could put me through on how to resolve this issue.
    Thank you for the usual support
     
  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    What is the sensor? Can you post the manufacturer and part number, or a link to the data sheet?
     
  3. BobK

    BobK

    7,682
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    Jan 5, 2010
    I don't understand. Why not just operate the sensor in the 0 to 5V mode?


    Bob
     
  4. firstoption

    firstoption

    9
    1
    Mar 8, 2014
    Thank you all for taking the time to respond to my question . I really appreciate your sense of understanding. I was unable to upload the file because of the size but below is a link to the datasheet:

    http://www.micro-epsilon.com/download/products/_temperature/dax--thermoMETER-CTM3--en-us.html
    The Information is on page 3 of the datasheet. The model I want to work on is: CTM-3SF22-C3

    Why not just operate the sensor in the 0 to 5V mode?

    I equally thought of something like a Switch that can be used to select 5V mode or 10V mode but the Problem i am having at the Moment is that i do not have the sensor with me . I was only asked to design a circuit that will convert the analog Output Signal from the sensor to digital Signal. I have sent a message to the Company with respect to the 5V/10V mode but uptill this Moment i have not received any reply. So to be on a safer i am thinking of making Provision for the two modes. Thank you once again for the Support.
    Best regards.
     
  5. BobK

    BobK

    7,682
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    Jan 5, 2010
    Okay. All you need to do to use it in 10V mode is to use a voltage divider to drop the voltage in half.

    Bob
     
  6. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,272
    Nov 28, 2011
  7. firstoption

    firstoption

    9
    1
    Mar 8, 2014
    Thank you very much for the Response. I am very grateful . You are perfectly i saw the detail Information in the section you directed me to_Once again thank you for the Support.Best regards.
     
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