Hello everyone im quite new to arduino and i need a few pointers to get me started.
I have had a go at using Arduino to control LED'S and a custom made 4wd rover to go forward backward (the basic stuff while i am waiting for sensors for it).
My real question here is are there any good motor controllers out there than can handle 3Amps+? Im building a new rover that uses 4 metal gear motors each with a stall current of 1.7A. its going to be a differential steering setup so i will be needing atleast 3.4amp to each pair of motors.
The 4wd rover i was taking about uses 2 30 amp ESC's that i have gotten to work well using the servo library. Should i just use the 30 amp controllers or should i use two of these in parallel:
actually The one that you posted can handle 4amp its just that you need to connect both A and B together. meaning its logic and its output. this is cause the IC is made to drive 2 DC motor with current of 2A each.
The 2503 is dual 3 A w/o heat sink, 5 A peak. Adding a heat sink and /or fan would increase that capacity. This driver uses the MC33926 which has current limiting if you over heat it. Pololu test results delivered 5 A on both channels for 10 sec. before thermal protection started reducing the current. It delivered 4 A for 37 sec. before limiting. It did 3 A all day without limiting.
If you want lots of power, the 2502 can handle dual 25 A drive capability.
rweber95:
The 2503 is dual 3 A w/o heat sink, 5 A peak. Adding a heat sink and /or fan would increase that capacity. This driver uses the MC33926 which has current limiting if you over heat it. Pololu test results delivered 5 A on both channels for 10 sec. before thermal protection started reducing the current. It delivered 4 A for 37 sec. before limiting. It did 3 A all day without limiting.
If you want lots of power, the 2502 can handle dual 25 A drive capability.
tawandapro:
should i just use the ESC'S that i am using on the 4wd rover instead? The pololu ones are pricey plus the postage will drain my budget
No idea - what kind of ESCs are they, brushless or brushed? I presume your gear motors will be brushed from the discussion
above but you haven't given details of the existing set-up.
tawandapro:
should i just use the ESC'S that i am using on the 4wd rover instead? The pololu ones are pricey plus the postage will drain my budget
No idea - what kind of ESCs are they, brushless or brushed? I presume your gear motors will be brushed from the discussion
above but you haven't given details of the existing set-up.
I am using the servo library to control the esc's the signal wire is connected directly to the pwm pins in the arduino uno i have and i have controlled them arduino just backward forward motion.
I am using the servo library to control the esc's the signal wire is connected directly to the pwm pins in the arduino uno i have and i have controlled them arduino just backward forward motion.
They ought to work nicely with any brushed motors I think (no shortage of power!). The Servo library doesn't mandate the use of PWM
pins BTW - its interrupt-driven rather than using the hard-wired timer-counters, can control any pins.
If you get one from ebay, atleast double your needs, cause often what they say they can handle is only true if you put a fan on it and putit in an icebox.
permnoob:
If you get one from ebay, atleast double your needs, cause often what they say they can handle is only true if you put a fan on it and putit in an icebox.
In what way is a 320A ESC not overkill already? Three hundred and twenty amps.... Even if that's an exageration by a factor of ten its
still going to drive a 3A motor!