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1、适合驱动8.2V~45V 2.5A以下的步进电机；
2、只有简单的步进和方向控制接口；
3、六个不同的步进模屎全、半、1/4、1/8、1/16、1/32；
4、可调电位器可以调节最大电流输出，从而获得更高的步进率；
5、自动电流衰减模式检测/选择；
6、过热关闭电路、欠压锁定、交叉电流保护；
7、接地短路保护和加载短路保护
1、最大电流2.5A。
2、最高支持32细分。
3、4层PCB板，散热性能更好。
4、芯片内阻更小，发热更低，散热性更好。
1、驱动电流算法：i = vref x 2（2倍关系），电位器有三个引脚，用万用表测试面向8825方向的引脚的电压为Vref，可通过电位器调节电流，顺时针拧是增大电流，逆时针是减小电流。由于wiki的设计问题，默认Vref可能已经超过1.25v，所以在使用前务必调整Vref到1.25v以下！
2、安装时注意方向，否则可能会烧毁驱动
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Overview
This product is a carrier board or breakout board for TI’s DRV8825 stepper motor driver; we therefore recommend careful reading of the DRV8825 datasheet (1MB pdf) before using this product. This stepper motor driver lets you control one bipolar stepper motor at up to 2.2 A output current per coil (see the Power Dissipation Considerations section below for more information). Here are some of the driver’s key features:
Simple step and direction control interface
Six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step
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
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
45 V maximum supply voltage
Built-in regulator (no external logic voltage supply needed)
Can interface directly with 3.3 V and 5 V systems
Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout
Short-to-ground and shorted-load protection
4-layer, 2 oz copper PCB for improved heat dissipation
Exposed solderable ground pad below the driver IC on the bottom of the PCB
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)
We also carry a DRV8824 stepper motor driver carrier that can serve as a direct substitute for the DRV8825 carrier when using lower-current stepper motors. The DRV8824 can only deliver up to 0.75 A per coil without a heat sink (1.2 A max with proper cooling), but it has larger current-sense resistors that allow for better microstepping performance than the DRV8825 carrier at low currents. The only way to tell our DRV8824 carrier apart from the DRV8825 carrier is by the markings on the driver IC; if you have a mix of the two, you might consider marking them (there is a blank square on the bottom silkscreen you can use for this). For lower-voltage applications, consider our pin-compatible DRV8834 carrier, which works with motor supply voltages as low as 2.5 V.
This product ships with all surface-mount components—including the DRV8825 driver IC—installed as shown in the product picture.
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