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
Replies
With APM1 there are two choices:
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.
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
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