Don't bother trying to make a speed controller. It's a bloody difficult job for people with decades of electrical experience with many blown up boards. For those without the electrical background it's near impossible.I'm not sure on a speed controller yet-
I will hopefully try to build by own with the help of our electronics technician at school, but if that doesn't work I will have to try and buy a second hand one.
I will only overvolt them to 18.5v making them comparable to a Bosch 750, I will try to use a low gear ratio to reduce the load on the motors to stop them drawing too much.
Could I use some kind of voltage limiter to set a limit on the current a motor can draw?
Those bosch 400s whilst they seemed like a good deal at first have been a pain for people to use as they are difficult to find a suitable speed controller for.
With regards to the batteries, hold off on buying them. I have bought a couple of 2.7Ah nano turnigy batteries that I intend on running in boner at the next UK champs. I will be able to give you a proper run down on them after then.
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