diff --git a/README.md b/README.md
index 11039bf..2021fb6 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 - avrdude doc : https://avrdudes.github.io/avrdude/
 - avrdude 6.3 doc : https://download-mirror.savannah.gnu.org/releases/avrdude/avrdude-doc-6.3.pdf
 - embedded systems : https://en.wikibooks.org/wiki/Embedded_Systems/Atmel_AVR
+- timers for newbies : https://qiriro.com/bme6163/static_files/notes/L3/Newbie%27s%20Guide%20to%20AVR%20Timers.pdf
 
 ## m00ex00