Last year I found some awesome Arduino pinout diagrams with full colour on the Arduino forums. They are all titled something like The Unofficial Arduino Pinout Diagram / The Definitive Arduino Pinout Diagram, etc. They disappeared from the Internet (pighixxx.com) in December 2013. With the help of the Internet Archive’s Wayback Machine I retrieved them. Fortunately they were distributed under a CC-BY-ND license, so here they are again in PDF’s for your download delectation.
Here’s an example bitmap version, but I recommend that you download, print and laminate the PDF version for your board.
Sorry, I couldn’t find any more PDF’s on the Internet Archive to host here.
Thanks, Alberto! Alberto’s writing a book, Arduino Basic Connections, but it hasn’t materialised yet, even though he’s raised quite a considerable amount of $$$. According to a tweet from him in May 2014, he’s been ill, so get well soon! It looks like it’s going to be awesomely handy, stuffed with all these pinout diagrams as well as ‘cookbook’ circuits with the same awesome graphic and detail quality and ring-bound. Fingers crossed…
Here are some other great books you might be interested in:
[amazon asin=1449313876&template=thumbnail] [amazon asin=0071784225&template=thumbnail] [amazon asin=0071771336&template=thumbnail]
Bootnote: Reader Nidal Ayari asked me to include a link to his Eagle files for Arduino Pro Mini. I haven’t even looked at them since I Don’t Do Windows (and so my PCB layout tool of choice is KiCad but I assume they’re good ;-).