I'm running a small robot project. I'm considering to switch from my 5v plastic motors included in the starter kit, to 12v ones. I'm considering to have the robot weigh 20-30lbs occasionaly, though as is, it can't haul maybe 10lbs very well.
Cost is REALLY an issue to us right now, so I'm thinking of recycling some parts, putting in a used go-cart battery for the (nearly) 12v, but I don't know what I need to in aspect to what gear ratios are required before searching EBay (where I get most of my parts, being on a TIGHT budget.
Thank you for any input!