| 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 |
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