Creative Commons images are CC BY-NC-SA 3.0

$ 14.95

added to your
shopping cart

In stock 208 in stock
14.95 1+ units
14.20 10+ units
13.46 25+ units
12.71 100+ units

Description: The EasyDriver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or 0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver). The EasyDriver requires a 6V to 30V supply to power the motor and can power any voltage of stepper motor. The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V. Connect a 4-wire stepper motor and a microcontroller and you’ve got precision motor control! EasyDriver drives bi-polar motors, and motors wired as bi-polar. I.e. 4,6, or 8 wire stepper motors.

This EasyDriver V4.5 has been co-designed with Brian Schmalz. It provides much more flexibility and control over your stepper motor, when compared to older versions. The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution. The sleep and enable pins are also broken out for further control.

Note: Do not connect or disconnect a motor while the driver is energized. This will cause permanent damage to the A3967 IC.

Note: This product is a collaboration with Brian Schmalz. A portion of each sales goes back to them for product support and continued development.


  • A3967 Microstepping Driver
  • MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth)
  • Compatible with 4, 6, and 8 wire stepper motors of any voltage
  • Adjustable current control from 150mA/phase to 700mA/phase
  • Power supply range from 6V to 30V. The higher the voltage, the higher the torque at high speeds


Recommended Products

Customer Comments

  • I am currently building a 3-axis cnc mill with sparkfun stepper motors, and I was wondering if I could drive a dual motor x-axis with just one easy driver. I would connect the two motors in parallel and run the wires to the same locations on the board. I figured if I used double the rated current to power the motors this would work. Am I correct, or should I buy another easy driver?

  • How can I get the coordinates of the holes to mount the driver? I can’t find them

  • Hey! I have a really basic and maybe funny question! But my stepper for an extruder print head requires 0.8A as it is specified on the motor. And the easy board gives max. 0.75; this means that I can’t work with this board? -ASYA

    • Does your extrude require 0.8A per phase, or 0.8A in total? The EasyDriver supports up to 0.7A per phase, or 1.4A peak for the entire two-phase motor.

      Whether you can get away with this depends entirely on how much load the motor is driving. It is very common to apply less than the rated current to stepper motors, as the needed current really depends on how much torque you require.

      There is also the Big Easy Driver, which isn’t a whole lot more expensive. Looks like a good board for your application.

  • I have a Nema-8 stepper from pololu that runs at 3.9V (600mA per coil). Will this board be able to drive the stepper?

    • It should, you just need a 3.9V power supply. The board just passes the voltage it is given through a current chopper to regulate amperage.

      • The supply voltage doesn’t matter. Because the coil current is regulated by the EasyDriver, independently of the voltage. The voltage drop over the motor depends only on the current and coil resistance, and so too would the power dissipated. Brian explains something similar on the EasyDriver website.

        See the first and second entry in the FAQ here:

        So just go ahead and use a 9V or 12V supply.

  • Work well and easy to use, but is not very powerful. For people who need more amps, I recommend using the A4988 ship which is used in almost every 3D printers.

Customer Reviews

4.2 out of 5

Based on 5 ratings:

5 star
4 star
3 star
2 star
1 star

Great - just be careful with EMI!

It works well. Easy to use with literally any microcontroller you can imagine. I use mine with a 3.3V Arduino Pro Mini.

Just beware of EMI. The A/B pads and traces leading to them, along with those pins on the chip, and your cabling leading to the stepper motor, will throw off a ton of EMI. This is not a fault of the board, it’s just what happens when you switch a stepper motor. It can mess with nearby microcontrollers and ICs. So be careful how you lay out your project - put some distance between the EasyDriver + stepper motor and other components if you can. If you can’t keep them isolated by distance, shield sensitive components with conductive, grounded material.

I wrote back and forth to Brian when dealing with the EMI issues in my project, he is very knowledgeable and courteous. Excellent support.

The chip can get hot to the touch. I am considering adding a heat sink to the top of the chip.

Handy Little Driver

Honestly, it did not work for the project I intended. Lack of having the flexibility to choose the + or - common for my signals was a problem. However I am not disappointed, I will be able to design future projects around that drawback. Overall, worth the price.

Works, but chip hot

Works great, but chip get hot at .5 amp. Probably not a problem, but I bought the larger, slightly more expensive, version (2 amp amp) and it runs with no noticeable chip heat. I might add that I did not use any of the associated code for either the large or small version. I see no obvious need to change the micro-step options on the fly (except maybe for testing), so I hard wired those and just used the direction and step controls. I drive direction off a port output and step from a counter that automatically toggles an output pin on reaching a selected value. (Note this is outside the std Audrino I/O, but far easier in the long run. I suggest everyone should at least glance at the Atmel manual for the Arduino chip an try using some registers directly.)

Hi, These will get warm, even hot in some cases. The chip is syncing a lot of power and that shows through heat. If you are running this on the higher end of the spec, it is suggested that you manage the heat with a heat sink on the chip.

0 of 1 found this helpful:

Not as great as I had hoped

Keeping in mind that I an a novice using arduino and associated products, I am really disappointed with the quality of the coding that I have found so far concerning this board. It seems like everyone is “ga-ga” over it, so the purchase was a natural decision. Unfortunately I feel that I’m back in the Commodore 64 days of loading tons of code, only to find that they don’t work. So I expend hours ensuring that I haven’t missed, or added something. And generally I haven’t. So then I wind up trying to figure out what was inadvertently added, or omitted by the author. Next I start to review other codes and inserting portions of what I think worked to the new code, only to find out that they aren’t compatible either. This board is no exception. I’m sure it is probably as good a product as others have reported, but for me, so far, I am not a great fan. By the way, I also have the Seeed Motor Shield and the Adafruit Motor Shield V2.0 and I have exactly the same feelings for them.

You are describing one of the main hurdles of the open source hardware community. Open source code can be hit or miss. You have to learn want resources tend to be good and what resources can be more questionable. Bildr is a great resource that generally has good documentation and examples. –

Motor control made super easy!

I got 18 of these to drive a bunch of motors (ROB-09238) at once. Each one worked flawlessly and handled the power without doing any adjustment. Programming was a snap using the AccelStepper library. Used a Mega 2560 to control the step and direction logic.

There was a catastrophe: three of my boards got clipped by an MDF panel and the capacitors were ripped right out. I replaced the caps with typical polar caps (the tallish cans) and the boards are running just fine again.

Related Tutorials

Easy Driver Hook-up Guide

May 5, 2015

Get started using the SparkFun Easy Driver for those project that need a little motion.