retrolefty:
bperrybap:
Is the DUE is using a compatible shield footprint as the Uno/Mega?
If so, Is the DUE 5V tolerant on the inputs?
Or are users potentially going to be burning up inputs when they attempt
to use their existing 5V shields on the DUE?In other words, if the DUE is backwards compatible with existing shields,
how do you prevent users from damaging their DUE when plugging in 5V shields?--- bill
That was discussed by several of us in this or possible another Due based thread. I believe some of us feel that many a new beginner will most likely (or at least potentially) suffer damage from using non-Due compatible shields. Venders of shields will probably have to be burdened to state with their shield offerings if their shield products work with Due only or older arduino + Due or older 5vdc arduinos only. I don't see a good case for why they didn't give the Due a whole new shield footprint to work with?
Lefty
From the SAM3X datasheets...
Voltage on Input Pins
with Respect to Ground....................................-0.3V to + 4.0V
So the IC's I/O pins certainly can't take 5 VDC logic. I suppose it's possible for there to be optional FET based level shifter circuitry for each I/O pin, but it's very unlikely they included it on the stock Due...