{"id":1330,"date":"2026-09-19T18:09:41","date_gmt":"2026-09-19T08:09:41","guid":{"rendered":"https:\/\/www.reefwing.com.au\/?p=1330"},"modified":"2026-09-19T18:09:43","modified_gmt":"2026-09-19T08:09:43","slug":"building-an-nfc-powered-pcb-business-card-for-embedded-ai","status":"publish","type":"post","link":"https:\/\/www.reefwing.com.au\/?p=1330","title":{"rendered":"Building an NFC-Powered PCB Business Card for Embedded AI"},"content":{"rendered":"\n
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Tap a phone on the card and nine LEDs light up in sequence that emulates a neural network. The whole thing runs on whatever energy a mobiles NFC field can push into a loop of copper on a credit-card-sized PCB (about 5 mA at 2 V).<\/p>\n\n\n\n

The card is to promote my new book, Embedded AI: Intelligence at the Deep Edge (No Starch Press), and Reefwing Software, the company behind it. Front Side: the book title, my name and the LED network. Back Side: Reefwing branding, a QR code, the web address and three programming pads. Both the NFC tag and the QR code point at a short URL.<\/p>\n\n\n\n

The NFC business card is an open-source hardware and software project, with the design files and code released under the MIT licence. The Reefwing Software repository<\/a> includes the EasyEDA schematic and PCB layout, artwork, Arduino firmware and programming instructions, so you can build your own card, adapt the design or use it as a starting point for another project. The design is still a prototype, so check the repository\u2019s validation notes before ordering boards.<\/p>\n\n\n\n

Read More…<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Tap a phone on the card and nine LEDs light up in sequence that emulates a neural network. The whole thing runs on whatever energy a mobiles NFC field can push into a loop of copper on a credit-card-sized PCB (about 5 mA at 2 V). The card is to promote my new book, Embedded […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_wp_convertkit_post_meta":{"form":"-1","landing_page":"0","tag":"0","restrict_content":"0"},"footnotes":""},"categories":[49,45,46],"tags":[54,9,69],"class_list":{"0":"post-1330","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ai","7":"category-embedded","8":"category-iot","9":"tag-arduino","10":"tag-development","11":"tag-embedded-ai","12":"entry"},"_links":{"self":[{"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=\/wp\/v2\/posts\/1330","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1330"}],"version-history":[{"count":1,"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=\/wp\/v2\/posts\/1330\/revisions"}],"predecessor-version":[{"id":1332,"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=\/wp\/v2\/posts\/1330\/revisions\/1332"}],"wp:attachment":[{"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1330"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1330"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.reefwing.com.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1330"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}