Is it possible to build a network to make the 7757 work on 120V and 220V grids with the same circuit?
You can design the input network & PCB based on 220V input and then use it with 110V input. IF higher accuracy is required, it is recommended to calibrate at both inputs and use corresponding calibration constants as there might be some differences due to crosstalk.
Thanks for your reply.
I don´t think I´ll need higher accuracy compared to 220V... if it remais the same, it is OK.
But if I don´t change the resistor network, the voltage at the end of it will be half of the designed for 220V. I guess this won´t create problems right?
If you design your input network for 220V, then 110V should work fine.
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