During the recent PayPal X Innovate 2010 Developer Conference, PayPal Labs’ Ray Tanaka showcased a proof-of-concept gumball machine that combined PayPal, QR codes, a smartphone camera and Twitter to accept mobile e-payments. The otherwise ordinary vending machine, uses an Ardriuno processor along with a WiShield to enable the process. A user simply scans the QR Code to begin dispensing the candy and shortly thereafter receives a Twitter notification showing that their payment has been been processed and how much has been charged.
In the video below, Tanaka explains how it works.
[via Wired UK]