×

SparkFun Electronics will be closed on November 26, 2020 and November 27, 2020 for the Thanksgiving holiday. We will begin normal operations at 9:00 AM Mountain Time on November 30, 2020.

×

Please see all COVID-19 updates here as some shipments may be delayed due to CDC safety and staffing guidelines. If you have an order or shipping question please refer to our Customer Support page. For technical questions please check out our Forums. Thank you for your continued support.

Member #1477607

Member Since: November 25, 2018

Country: United States

  • I'm very new to Arduino. I would like to build a figerprint lock system with this board that is primarily powered by an account adapter with battery backup. I can figure out how to setup the figerprint part but I'm unsure if I can have a battery connected that will switch over when account is lost. Anyone of a tutorial to that end.

No public wish lists :(