Hey guys, n00b here (first ever hardware project, I'm a software engineer) :) I am currently in the middle of a time lapse slider project (yes, another one :)), and I'm puzzled about powering it on the go.
I have a Mega board, A4988 as a driver (the red clone) and a NEMA17 stepper (I have a feeling that it is a Wantai 42BYGH W811, but not sure how to check).
Currently (in a prototyping phase) I'm powering it using a 9V battery, but obviously it's not a good option (it's weak and very small capacity). I have two options in my mind: 1. Buy a mobile power bank with big capacity and higher voltage output (e.g. this: http://www.fasttech.com/products/0/10004461/1341206-qidian-1a-1-5a-2a-4a-6-18650-mobile-power-bank has big capacity and I could use 9V 1.5A output) 2. Buy a sealed lead acid battery (afaik, much less capacity)
I would be very happy if I could just use the first option because I could take it with me on the plane, which I doubt I could do with the second option.