Hello there,
I am new to DIY electronics; but I am really excited to dive into my first complex project. I have a background in 3D printing but less experience with electronics; especially when it comes to integrating Arduino or other microcontrollers.
PLA for 3D printed parts; an Arduino Uno; a few proximity or touch sensors; addressable LED strips; and a small battery pack.
The sensors will detect touch or motion and trigger the LEDs to light up in different patterns. I would love to eventually program a series of different light effects based on the input.
I am unsure about how to best integrate the wiring with the 3D printed structure. Should I design channels for the wiring; or are there better methods? 
Also, I have gone through this post; https://forum.arduino.cc/t/diy-3d-printer-your-collective-thoughts-minitab/ which definitely helped me out a lot.
I need advice on choosing the right power supply that can handle both the Arduino and LED strips; without being too bulky for the design.
Thanks in advance for your help and assistance. 