Hi There,
I purchased the DRV8835 motor driver for arduino (Pololu item #: 2511).
I got this specific one becuase its the same as the Zumo robots runs and i was very happy with the performance of the Zumo. But this module seems to have seriously lower power output, which is made worse when i power both arduino and motors from the same battery.
First i tried to check if there was any known issues on the forums and found there was issues with these little tamiya motors, which is what i was initially testing on (some old RC car i was trying to hack)
then i tried one of the official HP 75:1 metal gear motors that came from one of my Zumo’s after i did a upgrade to 100:1. And the result was the same:
Very slow and very weak… with full gears assembled on the HP 75:1 micro metal gear motor i was able to stop the motors with little effort with my fingers… removing the VOUT-AVIN jumper to split the power made it marginally better but no where near enough power for something that can carry the weight of its self + a battery…
I am running the default example sketch on a UNO r3, with a 7.2Volt NI-MH battery pack at 700mAh — This was tests done where arduino and motors was powered
i also tested 9v to arduino + 4.8v/1300mAh to motor setup and same thing.
Can you pls let me know if i am doing anything wrong here with this setup. Also can you advise on best motors & power combo (for a simple robot type setup) for this driver.
TA