diff --git a/README.md b/README.md
index 8e79e6a..0174e41 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This piece of garbage receives commands via mqtt and emits NEC decoded commands
  - Wemos D1 Mini
  - IR Receiver Diode TSOP38238
  - Some IR Diode
-
+ - BC337 Transistor
 ## Used Software
 
 Heavily based on https://github.com/markszabo/IRremoteESP8266