I wanted to see if it was possible to modify this dual meter to accept a different shunt mv rating – suffice to say it is not without creating a very sensitive opamp circuit. The input resistors only serve to protect the input, the actual sensitivity divider network is internal to the IC chip and cannot be changed. Overall the meter is very accurate and for the price ~$10 is very useful, I think I will add it onto my large power supply for more accurate power readings and the ability to see watts instantly.
