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Voltage measurement for Shield V2 Airspeed Sensor and Battery Monitor

Posted by Nathaniel Caner on July 16, 2010 at 9:15am
Where is the best place to take the 5v measurement, to provide accurate readings from the pressure sensor and the battery monitor?


Is there a better place than at the GPS heaader shown in  red above?


Will this reading be appropriate for both the battery voltage monitor and the Air pressure sensor?


//0-8
#define BATTERY_EVENT 1                 // (boolean) 0 = don't read battery, 1 = read battery voltage (only if you have it wired up!)
//0-9
#define INPUT_VOLTAGE 5200.0    // (Millivolts) voltage your power regulator is feeding your ArduPilot to have an accurate pressure and battery level readings. (you need a multimeter to measure and set this of course)
Thanks,

Nathaniel

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Tags: ardupilot, battery, monitor, shield, v2, voltage
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  • space_nut July 16, 2010 at 10:16am


    You may want to confirm this with Jordi, Chris & co.

    I think that the voltage reference may be pulling from the actual AP board with analog 5 connected. There are 2 points, one next to the GND on the FTDI header side (the one we use to power XBEE or IMU. The other is next to the GND near the GPS (look under the AP board for labelling.

    As I say, you may want to get this from the horses mouth - no offense intended ;)
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