Why is the output of [ACS712](
link url) current measurement module unchanged? I connected 5.0V to VCC, and the output is always 2.56V. After connecting the current of 2-5A in series, the output has not changed. I use an AC power supply, and I directly use an AC voltage regulator to connect the thermal, serial current. Does anyone know the reason?
link url) with arduino. Are the the atmega series programmed with the same software? Are the programming principles the same?