This photo shows the custom connector, and cable I made for the battery monitor. The adapter at the top of the page gets installed between the ESC and the Battery. The small wire and female connector are connected to the cable, and then to AN5 on the Ardu Shield. The bulge in the middle of the cable is a cluster of resistors to adjust the voltage divider network on the Ardu Shield. For me I'm using a 6s LiPo battery and at 22.2 volts nominal, it's too high to be connected directly to the Ardu Shield, so an additional resistor was needted to change the divider ratio. In my case that turned out to be 164k ohm.

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