With this tutorial, you will build a NFC lock box, that allow you to use you NFC phone, your NFC ring or any tag to open it and make a cool gift!
<a href="https://www.youtube.com/watch?v=cIedvE9mYfM" target="_blank">https://www.youtube.com/watch?v=cIedvE9mYfM</a>
This is an example of application of the KeyDuino board (<a href="https://www.kickstarter.com/projects/1535978353/keyduino" target="_blank">https://www.kickstarter.com/projects/1535978353/keyduino</a>) but can be used with any NFC shield.
Code can be found here: <a href="https://github.com/RayBor/KeyDuino/tree/master/KeyDuino/examples/projects/nfc_box" target="_blank">https://github.com/RayBor/KeyDuino/tree/master/KeyDuino/examples/projects/nfc_box</a>
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DC connector
http://www.aliexpress.com/item/Free-Shipping5-5mm-x-2-1mm-DC-Charger-Jack-Socket-Female-Panel-Mount-Connector-Adapter-Copper/32237173613.html
How long does the battery last?