A4988 Stepper Motor Driver

Helping out a friend with a new laser engraver led to me having to debug the circuit containing the A4988 Stepper motor driver.

Whilst doing that I used the following circuit and code on a Arduino UNO to test the various components.


The circuit use the following baseline from the Pololu website

Things to note:

It is important that VMOT be in the 8-35V range (I use 12V)

The Circuit used:

 

And the code:

Loading Gist: https://gist.github.com/madmouser1/dc271f3ed70175d9bd8c0b6b4edb50b7

	I copied the gems to my box and installed them with the below command.. (it did take a while to install). Thus, please give it sometime before you think it might hang for ever.
	mohnish@mohnish-laptop:~/xxxx/latest/prj_name/vendor/cache$ gem install ruby-debug19-0.11.6.gem -l
	Building native extensions. This could take a while...
	Building native extensions. This could take a while...
	Successfully installed linecache19-0.5.12
	Successfully installed ruby-debug-base19-0.11.25
	Successfully installed ruby-debug19-0.11.6
	3 gems installed
	Installing ri documentation for linecache19-0.5.12...
	Installing ri documentation for ruby-debug-base19-0.11.25...
	Installing ri documentation for ruby-debug19-0.11.6...
	Installing RDoc documentation for linecache19-0.5.12...
	Installing RDoc documentation for ruby-debug-base19-0.11.25...
	Installing RDoc documentation for ruby-debug19-0.11.6...

view raw Installing linecache19 - rvm ruby 1.9.3 hosted with ❤ by GitHub