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- Connect a shunt resistor between the negative terminal of the power supply and the negative terminal of the BMS carrier board.
- Connect an oscilloscope probe across the shunt resistor, with the ground terminal of the probe connected to the negative terminal of the power supply. Set the oscilloscope to trigger a single time.
- Power the BMS carrier board with 12 V between 12 V and the negative terminal of the shunt resistor. Toggle the output of PB9 on and off. Turn off the power supply.
- Determine the peak voltage, and divide by the resistance of the shunt resistor. The peak current should be less than 1 A.
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