- Mon Feb 05, 2018 6:31 pm
Two reasons I would use a voltage regulator for this:
(A) You don't get uneven draining of the batteries. if you wire 3x 6V batteries in series and hook lights and relays up to the lower two, they will drain faster than the "top" one which is only used for the motor, and you'll be required to do individual (balance) charging every time, instead of just occasionally.
(B) You can get odd voltages (eg. you want your lights to run at 13.5V so they're brighter). And it will stay consistent even as the batteries drain down
(C) you can change the input-side topology (eg. from 3x6V to a 5S Lithium Ion battery) and it will still work.
The cons: They don't like getting wet (and/or you have to spend more money to get a waterproof one)... And they are money.
I think this is up to the user as to what they need it for, but your point is valid -- for a 3x6v setup there are other options.
F-150 - 24-36V with homebrew 100A variable-speed motor controller, 4x 775 motors (no, it's NOT all-wheel-drive--look up 'quad damage' in the gearbox section for more info!)
Pink Rocket Princess Mustang - 15mph, 36V, 4x 775 motors, homebrew PWM controller rev 2....
Hurricane - 24V w/50A step-down controller, 775 motors