Punch Activated Arm Flamethrowers (Real Firebending)

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The art of firebending as seen in Avatar: The Last Airbender and The Legend of Korra is a melding of Asian martial arts and pyrokinesis. So how can we control fire with fancy fight moves in real life? With Arduinos, of course!

The flamethrower part of this project is composed of a butane fuel chamber and a solenoid valve. At the business end there is a modified arc lighter.

The punch activated part of this project is an Arduino Pro Mini and an accelerometer (in this case an LIS3DH Breakout from Adafruit). A fist performing a punch has a fairly unique acceleration profile that looks like a significant positive acceleration (the beginning of the punch), followed by an extreme deceleration (the end of the punch) within a small window of time (<100ms). That means our Arduino can distinguish punches from normal everyday gesticulations pretty easily!

Once everything is mounted to an arm, we have a flamethrower that can be actuated by an Arduino only when the arm has thrown a punch. And before you can say “sparky sparky boom man” you’ve become a firebender!

This isn’t a beginner project, and even for advanced users there is danger inherent in shooting fireballs from your fists. Read at your own risk!

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