I received a few of my DRV8825 to control my stepper motors but the wiring gets very confusing.

The setup is

• Ultratronics v1.0 Pro
• Stepper motor 17HS13-0404S
• Pololu DRV8825 Stepper Motor driver

The Stepper motor 17HS13-0404S documentation shows these wiring. Upper left.

The Pololu DRV8825 Stepper Motor driver has this setup. Using my Ohm meter I discovered that the Ultratronics v1.0 Pro board has this sequence of connectors.

Left to right: A1 (black), A2 (Green), B1 (Red), B2 (Blue).

Note, the connector to the upper right that comes from the same company that ships the Ultratronics v1.0 Pro. Red and blue are reversed.

However the Ultratronics v1.0 documentation shows these colors for the connectors. Red and blue flipped and the connector should be reversed.

Since I have never worked with a stepper motor before, it is going be trial and error to get the wiring correct. So I have to look out for smoke. LOL

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UPDATE:

Comparison with the Ultratronics v1.0 documentation versus the Pololu DRV8825 documentation clearly shows a mixup with A1 And A2. I tend to trust the DRV8825 documentation as teh correct one.