Rasciodc, Just curious, Why do you need to do the calculation during the flight? How are you using the data stored in eeprom and why dont you do the conversion after the flight?. If you only want to delpoy the chute using the a/d values then just compare the values during the flight and deploy the chute when the first 2 or so readings (depending on the filtering) are the lowest. Store the raw a/d values and do the conversion after re-entry and data download...