Drone Payload Attachment

I was hired by a client wanted to make an attachment for his drone so that it can carry a small load such as a bag of confetti or small objects and be able to drop them with a remote control. The maximum weight the drone was able to lift was about 100 grams. The system was designed, built and assembled using Arduino and 3D printing. The entire building process was documented, feel free to check out the video of how i made it. I've also written a report that includes the design process, circuit design and schematics as well as the code for anyone interested in checking it out in the pdf file below.