diff --git a/HID-lights.md b/HID-lights.md
index ac68970..0965086 100644
--- a/HID-lights.md
+++ b/HID-lights.md
@@ -26,4 +26,8 @@ Arduino code in [UltimatePopnController](https://github.com/CrazyRedMachine/Ulti
 
 Arcin code in [arcin-infinitas](https://github.com/kinetic-flow/arcin-infinitas/blob/master/arcin/report_desc.h)
 
-[Beef-board](https://github.com/HWXLR8/beef-board/blob/master/fw/Descriptors.h)
\ No newline at end of file
+[Beef-board](https://github.com/HWXLR8/beef-board/blob/master/fw/Descriptors.h)
+
+## Hardware reference
+
+[Rhythm cons wiki](https://rhythm-cons.wiki/getting-started/wiring-leds/)
\ No newline at end of file