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 (
Adafruit LIS3DH Triple-Axis Accelerometer (+-2g/4g/8g/16g): The LIS3DH is a very popular low power triple-axis accelerometer. It’s low-cost, but has just about every ‘extra’ you’d want in an accelerometer:
Three axis sensing, 10-bit precision
±2g/±4g/±8g/±16g selectable scaling
Both I2C (2 possible addresses) and SPI interface options
Multiple data rate options 1 Hz to 5Khz
As low as 2uA current draw (just the chip itself, not including any supporting circuitry)
Tap, Double-tap, orientation & freefall detection
3 additional ADC inputs you can read over I2C
To all that, we’ve also added:
3.3V regulator + level shifting, so you can safely use with any Arduino or microcontroller without the need for an external level shifter! Read more.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.