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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.

Features:

  • 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

Documents:

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Customer Comments

  • 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

  • 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.

  • 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

5 out of 5

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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.


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.


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.