Wikipedia:WikiProject QRpedia/user guide

To use QRpedia:

find the Wikipedia article you want to link to
copy its URL
go to http://qrpedia.org/ - do not use any other QR code generator (they won't give your users the multi-language options)
paste the URL into the box
click on the image and save it
import the image into a word processor programme or graphics package or use a
(optionally) add text labels
alternatively open the downloaded images in a program that can print several images at once as thumbnails (eg Windows Photo Viewer)
print the codes a minimum on 1 inch (2.5 cm) across, where possible 2 inches (5cm) is desirable to allow for distance and older smartphones with lower quality cameras
display it in a suitable location