Backpack straps ports

thingiverse

I wanted to add a power port to my backpack straps to charge my phone while on the move without having to deal with power bank either on my hand or passing the cable from the back pack. While designing the part I thought that I could also add a 3.5mm Jack for audio if i ever put my phone in the back but still listen to music. (1 used an 2 ring jack, if you use a 3 ring one then you can also use the mic on some headsets) I made 4 parts: 1. USB only 2. 3.5mm Jack only 3. 3.5mm Jack & USB 4. Dual USB I used a stranded cat 5e cable for the connections. Also I would recommend using eyelets and/or burning the surrounding of any holes you make on your backpack to make sure that the fabric doesn't start to "break down" and to preserve the strength of the backpack. Enjoy