diff --git a/README.md b/README.md
index 82c131b..9698d83 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
-# laserizer
+# LAOS/Nano adapter
 
-Adapter board LAOS - Arduino Nano
\ No newline at end of file
+This simple PCB is an adapter board for the LAOS laser CNC driver,
+to allow mounting an Arduino Nano instead of the original mbed LPC1768.
+
+The schematics include a complete Nano clone circuit with a CH340B
+USB-serial converter (similar to Chinese Nano clones), but there is
+no PCB layout provided.