Attopilot current & voltage sensor

Hi,

 

I've been through all the threads here regrading this issue and could find a solution :(

I bought the Attopilot current sensor from Sparkfun:

http://www.sparkfun.com/products/9028

 

I added the 3.9Kohm resistor in AN0 (and only in AN0) and i can't get the reading right. I am getting 0.63V-0.64V (correlating to 12.5V in full battery) in the Mission Planner.

 

I check the voltage that comes out of the sensor and its somewhere around 7V.

 

What's worng?

 

Thanks

Maayan

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Replies

  • With APM1 there are two choices:

    1. Internal resistor (added)
    2. AttoPilot module

    They are mutually exclusive. #1 OR #2.

    When using the AttoPilot you must add a 3 pin header to the APM1 and connect as shown in the Wiki..and below.

    AttoPilot_current.jpg

     

    Notice there are NO RESISTORS. The resistors are used IF you add a balance harness, soldered, onto the APM.

    You could wire point to point the AttoPilot to the APM1 with the same result if you do not have a header pin assembly.

    The electrons do not care how they get to the boards.

    Good luck!

    -=Doug

  • I just soldered up the same one.

    Was having similar questions.

    Does ACM support the voltage sensor yet?

    The only link I can find is in APM
    http://code.google.com/p/ardupilot-mega/wiki/Voltage

    This is the only other link I see in the ACM forums
    http://diydrones.com/forum/topics/help-please-attopilot

    JC
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