Losing your keys can be a terrible experience and while the best plan of attack is to retrace your steps, blogger celtwolf wanted a little more insurance, so he created a QR code for his keychain with his phone number on it.
Using a simple URI scheme, he created the QR code so that anyone who scanned it would pull up info to send him a text message. Once generated, he etched acrylic on with a laser cutter, and filled the recessed areas with polymer clay and baked it. Obviously, you’re hoping the finder knows what a QR code is, but you can just as easily create a similar system with your phone number on it. Just steer clear of using any phone number attached to your physical address.
A QR Code That Returns Your Keys [Pumping Station: One via Hack-A-Day]
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