Build your own high-current 4-axis stepper motor controller board for your DIY robot, DIY mill or mill conversion, DIY router or anything else that needs to move. This is a build-it-yourself kit from HobbyCNC.com.
Open the kit and verify all parts are present. If necessary, use an ohm meter to verify the resistor values.
NOTE: This photo shows the 4-Axis Kit - the 3-Axis kit has fewer parts (only the ones required to drive the 3-axis - compare the parts count against the included printed instructions)