Image credit: github As a common thing nowadays, you must know about RFID cards. It uses radio frequency identification technology to instantly identify/track the tags that are associated with any objects/living being. However, as per Hackday, it seems like an e-paper display makes the perfect fundament for a reprogrammable RFID card. This could be backed up by the fact … [Read more...] about GGtag: Reprogrammable ePaper-Based Badge with RFID Technology and Sound