Totally scratch-built electronics, including MPU-6050 sensors and DSPIC processor. Fantastic build log. From Hackaday:

What a sweet thing it is to see the first outdoor flight of a quadcopter. [Botched] has done a wonderful job of documenting the entire build process. Take a look at all that he has done, then jump after the break to see the extremely stable test flight footage.

Earlier iterations used feedback electronics that he designed, etched, and soldered himself. We think they looked pretty good, but he was not happy with the performance. He spent a bunch of time redesigning the IMU board, but after he printed out the PCB artwork he decided his soldering was not up to the QFN challenge and he went with a pre-assembled breakout board.

His post about PID tuning is quite interesting. He removed two of the motors and mounted those opposite ends of the chassis to a hinged stand. This let him tweak the feedback loop until the two remaining propellers were able to maintain balance even when he nudged the unit.

His test flight footage is accompanied by an on-board camera shot. He simply taped a smart phone to the battery and let it roll. Make sure you turn off your speakers before watching this one or the motor noise will let the boss know you’re reading Hackaday again instead of working.

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