Need advice on Voltage and Current readings

Hi all,

I sat down last night to install the attopilot current sensor on my quad but must admit that after reading the wiki I have come away a bit confused. The wiki suggests that if you are using a 3 cell lipo (which I am) that I should use the voltage divider on the apm instead of the current sensor as it has better resolution.

To measure current I should use the current sensor. All of this makes sense to me, but I want to make sure that I'm correct in my thinking.

In order to achieve this I would just solder on a 3.9k Ohm resistor on AN0 (for full battery voltage) and let APM handle the rest.

For Current I would use the current sensor connected to AN1 and Ground with no resistors soldered.

Is this correct ?

Thanks to any who can answer

Eoin

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Jason Short August 4, 2011 at 3:38pm

I believe you need to make a choice to use the current sensor or to use the 3 resistors and the balancer plug. You can't do both without reworking the code.
The current sensor is the way to go in my opinion. Voltages fluctuate a lot when flying.
Jason

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Need advice on Voltage and Current readings

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