Fork me on GitHub

Project Notes

#011 Using the X113647Stepper Library

A standard Stepper-compatible Arduino library that supports half-stepping the 28BYJ-48 unipolar stepper motor with a ULN2003A/X113647 Stepper Motor Driver Board.

The Build


It’s common to find the 28BYJ-48 stepper motor and a X113647 Stepper Motor Driver Board in Arduino starter kits.

However documentation is scant and the board is not exactly compatible with the standard Stepper library. See LEAP#431 28BYJ-48 for more details.

One thing that is not possible for the 28BYJ-48 to do with the standard Stepper library is half-stepping.

The X113647Stepper library is a demonstration of a library that is drop-in compatible with the standard Stepper library, but also supports other modes such as half-stepping.

The library is in a separate GitHub repository. See the X113647Stepper repo for more details.

Credits and References

Project Source on GitHub Project Gallery Return to the LEAP Catalog

This page is a web-friendly rendering of my project notes shared in the LEAP GitHub repository.

LEAP is just my personal collection of projects. Two main themes have emerged in recent years, sometimes combined:

  • electronics - usually involving an Arduino or other microprocessor in one way or another. Some are full-blown projects, while many are trivial breadboard experiments, intended to learn and explore something interesting
  • scale modelling - I caught the bug after deciding to build a Harrier during covid to demonstrate an electronic jet engine simulation. Let the fun begin..
To be honest, I haven't quite figured out if these two interests belong in the same GitHub repo or not. But for now - they are all here!

Projects are often inspired by things found wild on the net, or ideas from the many great electronics and scale modelling podcasts and YouTube channels. Feel free to borrow liberally, and if you spot any issues do let me know (or send a PR!). See the individual projects for credits where due.