diff --git a/README.md b/README.md
index 98a512a..3f532c2 100644
--- a/README.md
+++ b/README.md
@@ -19,3 +19,17 @@ mdbook build
 
 The output files are in `book` directory.
 
+## Contributing
+
+If you found missing hardware or just want to add/enhance hints and instructions,
+feel free to push them.
+
+Tips for adding hardware instructions:
+
+1. Compose a chapter in a new Markdown file in `src/hw`
+2. Add pictures if needed, store them in `src/img`
+3. Add link to the new chapter to the `src/SUMMARY.md`
+4. Do not forget to tell about all hidden/non-obvious obstacles and pitfalls
+5. Add testing steps, even if the "obvious" ones
+6. Add JSON sample if needed
+7. View changed and added pages with `mdbook build` (see building instructions above)