← Personal Projects

GoPro Karma Killer

An ultra-compact, foldable GoPro drone built to rival the GoPro Karma

Before DJI Mavic’s and Phantom’s ruled the skies, people who wanted to perform amateur aerial photography would build or purchase drones without a camera and attach a GoPro. If you wanted to get fancy, you would add a gimbal on there and maybe some live video feed. GoPro eventually tried to make their own drone which, apart from a few minor issues (such as them falling out of the sky during flight), was revolutionary in its foldable form factor. However, compared to modern DJI Mavic’s with integrated cameras, the Karma is now considered large and unwieldy. My goal was to build a hybrid between a GoPro Karma and a DJI Mavic, combining the flexibility of a GoPro with the portability of a Mavic.

To accomplish this, I decided to use one of these shells for the DJI Phantom 3 that are meant to make the Phantom work more like a Mavic. The Phantom used to be a popular option for people who wanted to mount a GoPro+gimbal to a drone before DJI started selling them with integrated cameras, so this shell was perfect for this application.

In the end, the GoPro Karma Killer produced excellent, stable video with no vibration using a GoPro Hero 7 Black, all while providing a live video feed to the transmitter and not using the GoPro’s built-in stabilization (to minimize video transmission latency).

The final result, unfolded.
Here you can see the drone folded up. Thanks to folding propellers and arms, the drone is very portable, especially compared to the GoPro Karma (which you can see on the last slide)
The insides. This thing is VERY densely packed. Flight controller, BMS, RC receiver, video transmitter, HDMI to RCA converter, GPS, OSD board, antennas, and the gimbal + gimbal controller all fit inside this compact package.
And finally, the original GoPro Karma, which I actually used to own. Unfortunately, I can't get a side-by-side since I sold the Karma a long time ago, but the size difference is clear if you compare the size of the GoPro relative to the body.