Printed Electronics in Supermarkets

Automated alerts
RFID can also automate consumer error prevention. For example, audible or visible alerts can warn when food or medicine is past its use-by date. Some RFID tags use additional electronics so that they can even speak, flash or reveal a written warning. The RFID labels can replace both the printed use-by date and bar code with a more accurate, clear and reliable alternative. MIT advises that RFID can also be used in this way to alert patients, in the home, if contra-indicated medicines are stored together, provided each medicine carries an RFID label.