diff --git a/README.md b/README.md
index 2819baf..6dfd534 100644
--- a/README.md
+++ b/README.md
@@ -7,4 +7,7 @@ https://github.com/andreika-git/hellen-one
 
 https://github.com/rusefi/rusefi/wiki/Hellen81
 
+Pinout:
+https://docs.google.com/spreadsheets/d/e/2PACX-1vSg41St_69moQ2rh92Mo4bStP-pNEcl9Qb2QOHikwrR-RgWGXKjmL9DsMgeUy9ewP8MYs3RSP3EftIc/pubhtml
+
 ![x](boards/hellen81-a/board/hellen81-a.png)