Inspiration

  • I wanted a quadcopter!

How it works

  • Plug in the battery!
  • Turn on the radio controller!
  • Twiddle some levers!
  • Crash!

Challenges I ran into

  • Shipping speeds out of Hong Kong are completely unpredictable!
  • Design before you build!
  • No magnetometer! Yaw-axis measurements are, consequently, comically wrong.
  • If you're not careful, interrupts can rewrite your data halfway through a read!

Accomplishments that I'm proud of

  • Actually built and programmed a quadcopter in high school

What I learned

  • Basic control theory! Copter control code implements a naive PID loop for motor output
  • volatile keyword in C!
  • Experience with interrupts and hardware-level programming! PWM, I2C, all that good stuff.
  • Implementation experience with circuits and sensors!
  • Making sense of hardware schematics!
  • Sparkfun is rad!

What's next for quadrotor

  • 3D-printed MKII that will hopefully enable aerial photography!

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