This Tardis Pendant Summons You #WearableWednesday


As some of you may know, is having their big Hack to the Future tour with their hackable DeLorean. As with any event, people are always needing help, but it can be difficult to notify people over the noise and excitement. What to do? Build a Tardis pendant that lights up when you’re needed! It’s a reasonable solution, coming from our hackster friends, Alex Glowaski and Ken Olsen.

Alex was looking to 3D print something key-chain sized, but happened upon a large Tardis that Ken had already printed. Following maker philosophy, they decided to use what was on hand, and so the pendant became something that a Beastie Boy would gladly sport. Yeah, we’ve all seen a light up Tardis, but this one can summon someone, thanks to a MetaWear controller and its default app. When a person needs assistance, they just hit a button on the app to light the Tardis blue. The wearer of the pendant then knows they’re needed. However, you are wondering how the wearer communicates that they’ve received the message. A flip of the Tardis will activate its accelerometer and relay a message back to the sender that the wearer is on the way. It’s a simple solution and makes it easy to stay in touch.

You can check out more details about this Tardis build on Also, if you are feeling the need to smallerize, you should check out our Tiny Tardis Pendant learning guide. There are two file sizes to choose for 3D printing, so you might be able to create a tiny summoning pendant. Bluetooth is harder in small spaces, but luckily tech is slimming down. Go for the challenge and say to yourself, “I am definitely a mad man (woman) with a box!”. Then, travel to the future and send us a video of you wearing the necklace.

Flora breadboard is Every Wednesday is Wearable Wednesday here at Adafruit! We’re bringing you the blinkiest, most fashionable, innovative, and useful wearables from around the web and in our own original projects featuring our wearable Arduino-compatible platform, FLORA. Be sure to post up your wearables projects in the forums or send us a link and you might be featured here on Wearable Wednesday!

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