I have an Adafruit Motor Shield, the V1. I have been using this thing with my OPSEPP Uno and a stepper motor with no issues. (Powered by 12v DC wall wart [CASIO]).
My question, or issue, not sure yet, is this:
Why when I connect my motor directly to the 12v power supply it operates efficiently (for my purposes) and when I run it through my Arduino with the Adafruit Motor.h library does it not power the same.
Basically on direct connection it works fine, but I want to be able to regulate the connection and reverse it, change the speed, etc.
It is possible I am utilizing the library or the board wrong.
Can someone indicate why the power or, torque seems to drop when through the board. I have tried all KHZ all speeds etc, no way to get the same 12v power directly and modulate it?