I designed this arm because i needed a flexible way to handle the RasPi Cam and a 24V led strip. The idea is based on this design "locking ball and socket arm" https://www.thingiverse.com/thing:824711 by alexrich82.
The mount can be fixed to the Ender 3 printer between lcd screws and the frame as shown in the photos.
You can print as many joint as you want in order to fit your needs and if you find the connection a little too loose just add a piece of tape on the surface of every sphere. I did it and the result was very good.
The box for the Camera remains closed due to interference and the led stand is not mandatory for the strength of the structure.
I use a 30cm ribbon cable to connect the camera to the raspberry fixed to the frame with this project of mine: Ender 3 Raspberry Pi 2/3 mount
As always any suggestion on how to improve it is very welcome.
If you have any doubt, do not hesitate to contact me, I'll try my best to help you.
If you like what I do and want to support me, head to https://www.paypal.me/giacomo30196 every bit helps me to make more things for you.