Corrected measurements for current and voltage

PiInTheSky / pits

Pi In The Sky Telemetry Software

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Corrected measurements for current and voltage #15

Closed phl0 closed 8 years ago

phl0 commented 8 years ago

As discussed in #highaltitude: The formulas for calculating voltage and current were a little incorrect yielding false values. We change the voltage divider in front of the ADC converter to use a ratio of 1:4.9 (10k to 49k). The current is measured in mA as A seems a little over rated :)

Upuaut commented 8 years ago

Thanks for alerting us to this. This is a hardware issue, any boards shipped after 01/02/2016 have R13 changed to a 25k resistor which should fix this. If anyone has an affected board you are welcome to send it back and we will replace the resistor free of charge.