/challenges-projects/design-challenges/enchanted-objects/b/blog/posts/identifying-keysCrucial to my design is the ability to detect and identify keys. The potential solutions are divided into following categories: wireless, wired and explicit. The later means the user explicitly states „this is key #11“ through some interface. This isen-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/enchanted-objects/b/blog/posts/identifying-keysTue, 07 Apr 2015 23:54:00 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0daef43d-f7fb-4f78-8811-b33728e7c770mcb10<p>A simple metal strip that the hanging key/keys made contact with might work for your ground.</p><p>&nbsp;</p><p>If you are hanging them up up then several 125Mhz or 13.5Mhz RFID tag readers will work fine.</p><p>Have a look at the same size of these 125Khz readers and antenna we used in the KeyAssist project.</p><p><a class="jive-link-blog-small" href="/products/devtools/explorenfc/b/blog/posts/nfc-or-rfid-reader">NFC or RFID Reader</a></p><p>&nbsp;</p><p>&nbsp;</p><p>Most modern vehicles use an antenna around the igntion key to detect the key.</p><p>&nbsp;</p><p>Mark</p><img src="https://community.element14.com/aggbug?PostID=20404&AppID=117&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/challenges-projects/design-challenges/enchanted-objects/b/blog/posts/identifying-keysTue, 07 Apr 2015 20:27:41 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:0daef43d-f7fb-4f78-8811-b33728e7c770Workshopshed2<p>You could have a PCB tag on the key with contacts on the end then rather than having hooks you could have slots which you put the tag into.</p><img src="https://community.element14.com/aggbug?PostID=20404&AppID=117&AppType=Weblog&ContentType=0" width="1" height="1">