Data voltages

[Vap0rz]

Thanks for putting this together and great talk at DC.
More of a question than an issue- Did you have any concerns at all with the reader (output) supplying +5 signal/logic voltage when the PI's typically don't like to see anything over +3.3 for input? I've always dropped the input down with a few resistors but maybe it's no longer a concern?
Thanks again

[Abanndun]

I completed this project. I agree, was a good talk @ defcon. The Raspberry pi in this documentation is powered via the 5v intake. I ran 5.1 into it with no issue.