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Re: [Paparazzi-devel] HV LIPO pack and GCS voltage indication


From: Felix Ruess
Subject: Re: [Paparazzi-devel] HV LIPO pack and GCS voltage indication
Date: Thu, 9 Aug 2012 15:01:07 +0200

Hi Chris,

See http://paparazzi.enac.fr/wiki/Current_sensor#Voltage_Sensor

Cheers, Felix

On Thu, Aug 9, 2012 at 2:53 PM, Chris <address@hidden> wrote:
Hi.
I have a question about battery voltage indication for anyone that might know.
I would like GCS to show the battery voltage like it does now but not from the standard source which i think i ADC_3  but from ADC_1.
I use 10 cell lipo pack and because the voltage is high i use a separate psu set to 12V
powering the AP and a resistor voltage divider connected directly to the 10 cell battery in order to make 50v appear as 3.3 (14.7K and 1K resistors)
This voltage signal is routed to ADC_1.
Unfortunately so far GCS is showing me 12v which is the supply to the AP and not the real lipo pack's voltage.
I know about the correction factor etc. but i don't know how to make the autopilot
use ADC_1 instead of the standard ADC_3
Is there any definitions that can be added to the airframe file in order to achieve this
or i must do some code changes?
Chris


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