Inverter building using Wiseguys Power board and the Nano drive board

Author	Message
KeepIS Guru Joined: 13/10/2014 Location: Australia Posts: 1992	Posted: 12:33am 14 Sep 2025       The power level of 10.5kW in the last post is wrong, it's actually much higher. It's being clipped by the Maximum ADC input voltage of the ARM7. I built this 9" touch screen Solar monitor and coded it years ago. Just checking the circuit and code, there is a resistive divider on the input to keep the 500A Sensor voltage in range, it clamps the ADC input keeping the current to a very low value on overload and clamped at around 3.2V. I need to modify that ADC input circuit and Code (resistive multiplier value) to read to at least 500A @ 3.2V in order to display the correct switching DC currents to match commercial Current Clamp meters, the down side is this makes very low current readings [< 8A] slightly inaccurate.