We are excited to introduce the Pololu DRV8825 Stepper Motor Driver Carrier, an alternative to our popular A4988 carriers that supports 1/32 microstepping, operates over a wider voltage range (8.2 - 42 V), and can deliver more current (approximately 1.5 A per coil without a heat sink). The board dimensions, pinout, and control interface match those of our A4988 carriers in most respects, allowing the DRV8825 to be used as a higher-power drop-in replacement for the A4988 in many applications. (The main differences between the two carriers are listed at the bottom of the DRV8825 product page.) Like our new Black Edition A4988 carrier, this module has a 4-layer, 2 oz copper PCB, and there is an exposed solderable ground pad below the driver IC on the bottom of the PCB.
For more information, please see the DRV8825 product page.
Since we’d like to know how this driver performs as an A4988 substitute, we are giving away some samples to qualified testers. If you are well-equipped to rigorously try out these new drivers and would like to give them a shot, please apply in this thread. Your post should include pictures of your application, what test equipment you have, and your background (e.g. are you an electrical engineer, have you been a serious contributor to the RepRap project, etc).