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High Current Power Module - M10121 hwrev

The sensor is based on the Allegro ACS758 analog high current Hall-effect sensor, which provides a low-offset and 100 μΩ resistance for low power loss and high inrush current capabilities.

Our M10121 board has two LTM8073 supplies for superb efficiency and uncompromised power delivery, one is fixed at 5.2V and the other has a selectable output from 5 to 12 V, more details below.

Integrated capacitors reduce voltage noise, however we still recommend to install the included electrolytic capacitor to compensate for long battery wire lengths and motor noise.

This board comes with a set of dip switches to optimize the range of the voltage ADC, given that the range is for up to 14S, this allows using lower cell counts without compromising the voltage indicator's precision.



  • 58.8V 14S LiPo VinMAX
  • 150 Amps Continuous - 200 Amps Max Current Sensing
  • 5.3V, 3A power supply
  • 5V, 6V, 7V, 8V, 9V, 12V selectable 3A power supply.


  • Board Weight: 24.44g (0.862 oz)
  • Board Dimensions:
  • 50mm x 50mm (1.9685" x 1.9685")

Graphical datasheet

This board is self-documenting, however these images and tables may help setting up the dip switches and configuring the parameters adequately.


S1 switch group

Switch # Vsel
1 5V
2 6V
3 7V
4 8V
5 9V
6 12V

S2-S3 switch group

Switch # Cell count VOLT_MULT
S2-1 3S 3.81
S2-2 4S 5.09
S2-3 5S 6.36
S2-4 6S 7.63
S2-5 7S 8.91
S2-6 8S 10.18
S3-1 9S 11.45
S3-2 10S 12.73
S3-3 11S 14.0
S3-4 12S 15.27
S3-5 13S 16.54
S3-6 14S 17.81

VOLT_MULT may vary depending on the ADC input circuit of the autopilot it is attached to, so fine tuning the value is encouraged for optimum accuracy.


Make sure only one switch from each group is ON at a time.


  • Set BATT_MONITORx = 4, then reboot.
  • Set BATT_VOLT_MULT = value of the table depending on the cell count and active switch.
  • Set BATT_AMP_PERVLT = 60.5

Pinout description

6-pin Molex Clik-Mate

PWR Connector

Pin Color Signal TTL/Voltage Level
1 red VCC 5.3V
2 black VCC 5.3V
3 black CURRENT 3V3
4 black VOLTAGE 3V3
5 black GND N/A
6 black GND N/A


A Molex Clik-Mate to JST-GH cable is provided to maximize compatibility.

4-pin Molex Clik-Mate

Additional power supply

Pin Color Signal
1 red Vsel
2 black Vsel
3 black GND
4 black GND


Download 3D Model

[Designed and assembled in USA]