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To Do Development: Circuit Modifications and Tests

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1) Modify the AC input circuit to be opto-isolated
2) Remove the rectifier and voltage regulator
3) Embed the UART to USB
4) Use the host PC's USB or USB power supply for DC power source
5) Evaluate Zero Crossing comparators

Source of these ideas = EEVBlog Forum for Open Source Hardware Projects:
http://www.eevblog.com/forum/oshw/synchrophasor-pmu-oshw-project-open-for-suggestions-and-critique/

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