# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1645564537 -3600
# Node ID 40879697b34757eab4cc8aa5f3f5fe03d546b554
# Parent  2f9cae2111911900464ced48fdff443fb5fbb6f7
Added notes about the board outline.

diff -r 2f9cae211191 -r 40879697b347 README.txt
--- a/README.txt	Tue Feb 22 15:37:55 2022 +0100
+++ b/README.txt	Tue Feb 22 22:15:37 2022 +0100
@@ -34,6 +34,21 @@
                                     footprint being provided by generic KiCad
                                     footprint libraries)
 
+Board Outline
+=============
+
+The board has the same outline and mounting holes as the Arduino Duemilanove,
+although it does not provide shield compatibility, physically or electrically:
+
+https://docs.arduino.cc/retired/boards/arduino-duemilanove
+
+Unfortunately, the physical characteristics of the Duemilanove are not
+adequately documented by the Arduino initiative. Consequently, others have
+been obliged to do this work, and the following resource was used to define
+the board outline used in this project:
+
+http://www.robgray.com/temp/Arduino-PCB-dimensions.pdf
+
 Board Version Notes
 ===================