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Attopilot Current Sensor 90A

posted 8 Nov 2012, 22:44 by Evert Bez   [ updated 8 Nov 2012, 22:44 ]
AttoPilot 90A
So the Attopilot current Sensor arrived , This turned out to be quite a "large" job to install ...

Link to SparkFun

Description: This is a small voltage and current sense PCB. DC current is determined by measuring a voltage drop across a pair of parallel 1 mOhm shunt resistors, then converted to a final analog voltage output by the TI INA-169. Voltage sense is accomplished by scaling to 3.3V ADC range by a precision resistor divider.

The PCB is supplied without leads or connectors. The pad sizes are large enough to accommodate 12 gauge heavy duty leads (see datasheet) but care must be exercised in soldering. Smaller gauge leads are considerably easier to solder without creating shorts.


  • 51.8V Max
  • 89.4A Max
  • Very low zero current offset
  • Analog output scaled for 3.3V ADC
  • Self Powered
Dimensions: 4 x 15 x 19mm

Unfortunately I did not document the install  ...there are enough reading material on the net to figure it out ...

AttoPilot 90A in bag

Here is the link for APM ...

AttoPilot 90A

Size Comparison .... It's small it should be ...Mine is mounted and working .