Item Name: A4988 DRV8825 Stepper Motor Driver Control Board Description: Shield V3 Expansion Board is designed for Arduino UNO compatible board; Shield V4 Expansion Board is designed for Arduino Nano compatible board; PCs in Item: 1 PC Manufacturer: N/A, Made in China Notes: Given the current market landscape, some lower-cost stepper motor drivers may vary in materials or manufacturing quality, potentially affecting operational stability. To ensure product reliability, we perform a 24-hour continuous runtime test on each driver module to screen out unstable units and deliver only those that meet practical usage requirements. Feature A4988 DRV8825 Microstepping Levels 1, 1/2, 1/4, 1/8, 1/16 1, 1/2, 1/4, 1/8, 1/16, 1/32 Maximum Current Up to 2A Up to 2.5A Voltage Range 8V to 35V 8.2V to 45V Logic Voltage 3.3V or 5V 3.3V or 5V Typical Rs value 0.05 Ohm or 0.1 Ohm or 0.2 Ohm 0.1 Ohm Vref formula (*) I_TripMax= Vref/(8*Rs) I_TripMax= Vref/(5*Rs) PCB layers 2 4 PCB color Green / Red Purple Stepper current adjust. trimpot Yes, near Dir pin Adjustable Configuration Resistance External potentiometer adjustment External potentiometer adjustment Built-in Protection Over-temperature, Over-current, Short-circuit Over-temperature, Over-current, Short-circuit Step Pulse Timing Fixed Adjustable Thermal Overload Protection Yes Yes Small heatsink Included Included Heat Dissipation Requires external heatsink Includes a heatsink Control Interface Step and Direction Step and Direction Applications 3D printers, CNC machines, robotics,etc. 3D printers, CNC machines, robotics,etc. Pricing Lower Higher Active cooling required? Recommended Recommended IC packaging 5x5mm 28-lead QFN 9.7×6.4mm 28HTSSOP
