1. Radio Frequency Identification (RFID)

2. What does an RFID tag look like?
microprocessor
radio antenna
Where’s the battery?!
Photo courtesy Getty Images

3. Physics Review - Induction
run electricity through a coil of wire
an electromagnetic field is generated
works the opposite way too!

4. RFID antenna
passing through an electromagnetic radio field powers the tag!
chip sends back a response using the antenna
response is an ID # back to the RFID reader
Photo courtesy Getty Images

5. Where do we see RFIDs?

6. Supply chain usage of RFID
efficiently count and track goods!

7. Other RFID uses authentication student attendance tracking
proximity access cards
passports
student attendance tracking
any wireless tagging