Holy motor controllers Batman! That's twice the amperage and half the cost of the Sabertooth 25a controller I was planning on buying!! This is what my plan was:
I don't know enough about motor controllers to compare them. The Sabertooth on my R/C mower has been great, but it's kinda of expensive... Does it offer more features that the cheaper one? Would it be more reliable?
My plan is to buy 1 more Sabertooth for an additional set of motors on that project, but I also want to build an arm out of car window motors. Do you think the cheaper ones would work for that?
The Sabertooth you have linked offers regenerative braking, thermal overload protection, and a variety of control methods. The eBay driver is just a basic H bridge. It depends on what features you need.
So the regenerative braking is great, but eventually I'll have a gas motor to keep the batteries charged so then it's not as great, just really cool. The variety of control methods would be great if it were test gear, but I'm only going to use 1 method, so the others are wasted. Thermal overload protection sounds really good, but is it worth that price?
I'm trying to find out how big the "catch" is with the cheaper unit. Sometimes it's not so bad, sometimes it's completely not worth it; that's what I'm trying to find out now.
allanonmage:
Thats a single H bridge, so it only controls 1 motor forward and back, right?
Correct. That would still be $36 for two motors. larger for two boards, but probably twice the heat sink capacity. Just depends on how much $$$ you have to spend vs your particular requirements with these things.
zoomkat:
... but probably twice the heat sink capacity. Just depends on how much $$$ you have to spend vs your particular requirements with these things.
Im not familiar with what you mean by "heat sink capacity" in this context....