In our case it is useless, so we can ignore it So, 12.6V on input will result in 6.3V on this pin. Voltage - this is input voltage divided by 2. This is a pin we have to connect to flight controller It is 0V when 0A goes through the module, and 5V when 90A goes through it. Current - voltage on this pin depends on current flow.5V - supplying 5V obviously, so it can be used as a BEC.Battery power leads, power leads for motors (module measures power going from battery to motors) and 4 THT pins: Pinout of APM Power Meter is pretty simple. You have to refer FC documentation and / or flight controller software documentation. Some boards have dedicated pins, on some boards PWM input pins are used for Current Meter ADC. I will not show where to connect APM Power Meter to flight controller, since this differs from board to board. It's time fix the problem and finally present a short tutorial how to connect 90A APM Power Meter for flight controller boards like Naza32, SP Racing F3 or any other running Cleanflight / Betaflight / INAV software and equipped with Current Meter ADC input. This topic was eluding me for some time now.
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