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The DRV8825 stepper motor driver carrier is a breakout board for TI’s DRV8825 microstepping bipolar stepper motor driver. The module has a pinout and interface that are nearly identical to those of our A4988 stepper motor driver carriers£¬ so it can be used as a higher-performance drop-in replacement for those boards in many applications. The DRV8825 features adjustable current limiting£¬ over-current and over-temperature protection£¬ and six micro step resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling). Features: 1. Simple step and direction control interface; 2. Six different step resolutions: full-step£¬ half-step£¬ 1/4-step£¬ 1/8-step£¬ 1/16-step£¬ and 1/32-step; 3. Can interface directly with 3.3 V and 5 V systems; 4. Over-temperature thermal shutdown£¬ over-current shutdown£¬ and under-voltage lockout; 5. Short-to-ground and shorted-load protection; 6. 4-layer£¬ 2 oz copper PCB for improved heat dissipation; 7. Exposed solderable ground pad below the driver IC on the bottom of the PCB; 8. Module size£¬ pinout£¬ and interface match those of our A4988 stepper motor driver carriers in most respects (see the bottom of this page for more information); 9. Adjustable current control lets you set the maximum current output with a potentiometer£¬ which lets you use voltages above your stepper motor’s rated voltage to achieve higher step rates; 10. Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay); 11. 45 V maximum supply voltage; 12. Built-in regulator (no external logic voltage supply needed). Please refer to http://www.geeetech.com/wiki/index.php/DRV8825_Motor_Driver_Board for more information!