Sort By:  
Stepper motor driver with Full, 1/2, 1/4, 1/8 and 1/16 stepping modes.
RepRap filtered endstop
Stand alone full sized SD Card Slot
A4988 Stepper Driver (A4988 Stepper Driver)

A4988 is a complete microstepping motor driver with built-in translator for easy operation. This product is available in full, half, 1/4, 1/8 and 1/16 step modes operate bipolar stepper motors, output drive capacity of up to 35 V and ± 2 A. A4988 includes a fixed off-time current regulator, the regulator in slow or mixed decay modes. A4988 converter is the key to the easy implementation. As long as the "step" input inputting one pulse drives the motor one microstep. There are no phase sequence tables, high frequency control lines, or complex interfaces to program. A4988 interface is very suitable for complex microprocessor is unavailable or is overburdened.

In the micro-step operation, A4988 chopping control inside automatically selects the current decay mode (Slow or Mixed). In mixed decay mode, the device is initially set to a fixed downtime in some fast decay, then the rest of the slow decay downtime. Mixed decay current control scheme results in reduced audible motor noise, increased step accuracy, and reduced power consumption. Internal synchronous rectification control circuitry is provided to improve the pulse-width modulation (PWM) operation power consumption. Internal circuit protection includes: thermal shutdown with hysteresis, undervoltage lockout (UVLO), and crossover-current protection. Special power sequencing.

A4988 surface mount QFN package (ES), a size of 5 mm × 5 mm, nominal overall package height of 0.90 mm, with an exposed pad for enhanced thermal dissipation. This package is Pb (suffix-T), with 100% matte tin leadframe plating.


Simple step and direction control interface
Short-to-ground and shorted-load protection
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step
Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay)
Over-temperature thermal shutdown, under-voltage lockout, and crossover-current protection
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.

Package Includes:

1 x A4988
1 x Heatsync

Stepper motor driver with Full, 1/2, 1/4, 1/8 and 1/16 stepping modes.
Endstop - RepRap Filtered (RepRap Endstop)

It using 22AWG wire, current up to 2A, 300V voltage. Insulated to cover a wide range of temperatures, and up to 80 degrees.
Board Size: Approx. 39 x 16 x 7mm / 1.54 x 0.63 x 0.28 inch
Cable Length: Approx. 70 cm / 27.56 inch

Connection Description:

Red: VCC (+)
Black: GND (-)
Yellow\Green: SIGNAL
RepRap filtered endstop
SD Card Slot (Full Size SD Card Slot)
Great for upgrades where the SD Card slot was on the controller board or in situations where that the awesome case you printed doesn't cater for where the old one was.


- Size:45*40mm(L*W)
Model Number: V1.2 SD card module
Cable: 20cm Dupont cable
Suitable: for 3D Printer 
Stand alone full sized SD Card Slot
Per Page      1 - 3 of 3
  • 1