Updated README

README.md

@@ -1,2 +1,17 @@
 # gh60_backlit
 GH60 backlit module
+
+:warning: Still in development and not tested :warning:
+
+## Goal
+
+This is a simple module to add backlit on the origianl [GH60 PCB rev. C](http://blog.komar.be/projects/gh60-programmable-keyboard/).
+
+It use GPIO2 (FN led) to enable backlit.
+
+## PCB render
+
+![PCB](./Previews/BACK.png "PCB")
+
+![PCB](./Previews/FRONT.png "PCB Front")
+