A4988 Stepper Motor Driver Carrier
A breakout board for the Allegro A4988 DMOS microstepping stepper motor driver with translator and overcurrent protection. It lets you control one bipolar stepper motor at up to 2 A per coil (with sufficient cooling) using a simple step-and-direction interface.
The board ships with all surface-mount components installed. A 1×16-pin breakaway 0.1″ male header is included but not soldered, ready for use with breadboards or 0.1″ connectors.
Key Features
- Simple Control Interface – Step and direction pins for easy microcontroller integration
- Five Microstep Resolutions – Full, half, quarter, eighth, and sixteenth step
- Adjustable Current Limiting – Onboard potentiometer sets the maximum output current, allowing voltages above the motor's rated voltage for higher step rates
- Intelligent Chopping Control – Automatically selects fast or slow current decay mode
- Built-In Protection – Over-temperature thermal shutdown, under-voltage lockout, crossover-current, short-to-ground, and shorted-load protection
- Motor Supply – 8–35 V
- Logic Supply – 3–5.5 V
- Max Current – 2 A per coil (with heat sink; ~1 A without)
Current Limit Setting
The current limit can be set by measuring VREF on the board. The formula is:
IMAX = VREF / (8 × RCS)
where RCS is 0.068 Ω on boards manufactured from January 2017 (0.050 Ω on earlier boards). For example, for a 1 A current limit with 68 mΩ sense resistors, set VREF to 540 mV.
Microstep Resolution
- MS1 Low, MS2 Low, MS3 Low – Full step
- MS1 High, MS2 Low, MS3 Low – Half step
- MS1 Low, MS2 High, MS3 Low – Quarter step
- MS1 High, MS2 High, MS3 Low – Eighth step
- MS1 High, MS2 High, MS3 High – Sixteenth step
Also Available
- A4988 Black Edition – four-layer PCB with ~20% better thermal performance
Resources
Package Contents
- 1× A4988 Stepper Motor Driver Carrier
- 1× 1×16-pin 0.1″ Male Header (not soldered)
Original: $9.76
-70%$9.76
$2.93Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
A breakout board for the Allegro A4988 DMOS microstepping stepper motor driver with translator and overcurrent protection. It lets you control one bipolar stepper motor at up to 2 A per coil (with sufficient cooling) using a simple step-and-direction interface.
The board ships with all surface-mount components installed. A 1×16-pin breakaway 0.1″ male header is included but not soldered, ready for use with breadboards or 0.1″ connectors.
Key Features
- Simple Control Interface – Step and direction pins for easy microcontroller integration
- Five Microstep Resolutions – Full, half, quarter, eighth, and sixteenth step
- Adjustable Current Limiting – Onboard potentiometer sets the maximum output current, allowing voltages above the motor's rated voltage for higher step rates
- Intelligent Chopping Control – Automatically selects fast or slow current decay mode
- Built-In Protection – Over-temperature thermal shutdown, under-voltage lockout, crossover-current, short-to-ground, and shorted-load protection
- Motor Supply – 8–35 V
- Logic Supply – 3–5.5 V
- Max Current – 2 A per coil (with heat sink; ~1 A without)
Current Limit Setting
The current limit can be set by measuring VREF on the board. The formula is:
IMAX = VREF / (8 × RCS)
where RCS is 0.068 Ω on boards manufactured from January 2017 (0.050 Ω on earlier boards). For example, for a 1 A current limit with 68 mΩ sense resistors, set VREF to 540 mV.
Microstep Resolution
- MS1 Low, MS2 Low, MS3 Low – Full step
- MS1 High, MS2 Low, MS3 Low – Half step
- MS1 Low, MS2 High, MS3 Low – Quarter step
- MS1 High, MS2 High, MS3 Low – Eighth step
- MS1 High, MS2 High, MS3 High – Sixteenth step
Also Available
- A4988 Black Edition – four-layer PCB with ~20% better thermal performance
Resources
Package Contents
- 1× A4988 Stepper Motor Driver Carrier
- 1× 1×16-pin 0.1″ Male Header (not soldered)
