Build your own 3D-printed Halo energy sword


This Halo replica features Bluetooth-controlled NeoPixels.


If you’re a fan of Halo, at some point you’ve probably thought that having an energy sword would be a good idea. For better or worse, you can’t obtain one of these weapons (yet), but the Ruiz Brothers at Adafruit have come up with the next best thing: a 3D-printed replica that uses programmable LED strips to make it glow.

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These strips are controlled by an Adafruit Feather 32U4 Bluefruit LE (ATmega32U4), enabling them to be programmed for excellent effects, like changing colors and powering on the lights in a sort of slow powerup pattern. Since this Feather has Bluetooth capability, the sword can even be controlled with a smartphone with no physical access to the board.

Besides Bluetooth, another neat feature of the Feather is that it has a battery charging circuit built-in. This allows the sword’s 2000mAh lithium-ion battery to be charged without adding any additional hardware. A switch is, however, added to turn the unit off when the owner isn’t busy pretending to pwn noobz with it.

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The blades are printed with transparent PLA, and the sword, including the handle, is made in 20 sections attached together with super glue. Despite its 34-inch blade, it impressively weighs under one pound.

If this all seems a little familiar, you might recall either of the Ruiz brothers’ Daft Punk helmet builds — you can find more info on Thomas’ helmet replica here.

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