This is a backlighting box for the Custom QR Code generator. It uses 9 x 3mm white LEDs. Used it at SoliDoodle's 3D Printing Expo after-party. While it worked great in my lab, using my Android phone, with the AT&T supplied code scanner, ...
Thingiverse - Newest Things
via Google Alerts - qr code
Thingiverse - Newest Things
via Google Alerts - qr code
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