diff --git a/README.md b/README.md
index b354cf4..e4bedf2 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,7 @@
 # Raspberry-Pi-Shift-Register
-Simple program showing usage of a shift register with a Raspberry Pi
+Simple program showing usage of a shift register with a Raspberry Pi with the SNx4HC595 chip.
+
+Pin Usage:
+Clock: 22
+Serial: 23
+Send: 24