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  • Gruntfuttock commented on flyguy161's instructable Arduino EV J1772 Charging Station1 year ago
    Arduino EV J1772 Charging Station

    I see how the GFCI circuit triggers, but how does it reset once the fault is cleared? Once the capacitor (0.1 uF?) in the feedback loop of the first op-amp is charged to a high enough voltage to send the output of the second [comparator] op-amp high how does it discharge again?Also: it seems that later versions of OpenEVSE can do a self-test of the GFCI system at start-up, sending a small current through a winding on the outside of the CT toroid to confirm that the system works; I cannot find a schematic which shows this. Can anyone offer any enlightenment?

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