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.Here is a link to a table comparing all of their drivers http://www.pololu.com/search/compare/11Bob Weber
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
Quote from: tawandapro on Dec 10, 2012, 12:58 pmshould 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 budgetNo idea - what kind of ESCs are they, brushless or brushed? I presume your gear motors will be brushed from the discussionabove but you haven't given details of the existing set-up.
They are brushed esc's and brushed 540 motors. The esc is this kindhttp://www.ebay.com.au/itm/New-320A-Speed-Brushed-Controller-ESC-1-8-1-8-1-10-RC-Car-Truck-Buggy-Boat-/110933808971?pt=AU_Toys_Hobbies_Radio_Controlled_Vehicles&hash=item19d42b974bI 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.
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.