ADC readings problem

fadilrosli · July 28, 2016, 1:23am

Both A2 & A3 gives 4.84V

mikhail.avkhimenia · July 28, 2016, 11:42am

That means that ADC on Navio is working fine. If there’s voltage on these pins coming from the power module over voltage and current measurement channels then it should not show zero.

Please check the power module cables for integrity.

fadilrosli · July 28, 2016, 2:09pm

Ok. I will check again.

fadilrosli · July 28, 2016, 3:27pm

Now i get
A2: 1.5V
A3: 0V

fadilrosli · July 28, 2016, 5:08pm

I think my power wires is the problem.
Top wires - pixhawk pdb power module.red pin 1 to pin 1
Bottom wires - apm power module. Red pin 1 to pin 6
Which is the correct wires?

fadilrosli · July 28, 2016, 11:22pm

Turns out that both power modules has different pinouts though. So both wires are not interchangeable. I guess i need to look for other power module to test.

mikhail.avkhimenia · July 29, 2016, 11:57am

Answer to which one is correct is also dependent on type of connectors and their pinouts.

fadilrosli · August 24, 2016, 6:58am

Hi Mikhail,

I’ve bought the Mauch 100A Hall Sensor Power Module. Here are the ADC tests:

USB Powered
.
Mauch PM

Still no reading on A3 channel using Mauch PM. USB has though.

igor.vereninov · August 24, 2016, 8:54am

When power module is not connected A3 is floating and thus showing some voltage. If you run some current through the power module, at least few amps, do you see a change on A3?