Necessity : I wanted to learn ( + build + experiment) quad-copter dynamics.
A tweak-able quad-copter is expensive. A friend of mine bought one for ~$500. I analyzed that the major cost of quad copter comes from
- Radio controller
- BLDC(+ ESC)
Electronics ( arduino / mbed / raspberryPi) is relatively cheaper.
When I saw this toy quad-copter, I got the idea to customize it. And I replaced the above parts with follows:
- Bluetooth link: Control it using android phone( Easy to find)
- IRFZ44 ( ESC to 3.7v dc-motors )