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KEYES Reprap 4-Layer PCB StepStick DRV8825 Stepper Motor Driver
More Features than 4988 : 1£¬ The maximum current of 2.5A. 2£¬ Up to 32 segments. 3£¬ 4-layer PCB£¬ better thermal performance. 4£¬ Smaller chip interial resistance £¬ lower heat£¬ better heat dissipation. Parameters: Dimensions: 20mm x 15mm (same as 4988) Driving current: 2.5A Subdivision: 1£¬1 / 2£¬1 / 4£¬1 / 8£¬1 / 16£¬1 / 32 The adjustment of driving current: Connect the GND with a multimeter's black pen £¬ connect the adjuster on R1 (ie potentiometer) with red pen£¬ adjust the voltage between 0.3V - 0.6V£¬ according to the specific motor parameters to adjust. Note : when you install the driver module£¬ we must pay attention to the direction that the wrong direction can cause burning module£¬ such as the image above B1£¬ B2£¬ A1£¬ A2 should be connected to the electrical interface.