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Re: RAMPS for Due!

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Regarding the outpus being on when VCC has no voltage:

This is due to the way the pull-up resistors are hooked up and the fact we're using N channel FETs to drive more N-channel FETs.

Basically with no input on the gate of the DMN2075U's (the ones matching outputs 1-4), they are left in their open state. This means that the gate on the IRLB8743's gets all of +VGATE, switching it on.

This basically means that the existing Dual FET arrangement is broken by design if the 3.3v supply fails. :/

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