diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 0000000..c8662b8
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,6 @@
+The files in this project are under the GNU Lesser General Public License version 2.1 or later (LGPL v2.1+).
+
+Exceptions are:
+
+* The module "USART" and the Makefiles are from: https://github.com/hexagon5un/AVR-Programming
+* The module "lcdroutines" is from: http://www.mikrocontroller.net/articles/AVR-GCC-Tutorial/LCD-Ansteuerung