×

SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.

Member #419717

Member Since: March 16, 2013

Country: United States

  • As an avid swimmer, I have thought it would be cool to put a waterproof RFID tag on my swim goggles and have an arduino or other microcontroller count my laps and show my split times on a waterproof wall mounted display. Using RFID tags would allow multiple swimmers per lane to use the same display.