diff --git a/doc/README b/doc/README
new file mode 100644
index 0000000..e88055f
--- /dev/null
+++ b/doc/README
@@ -0,0 +1,6 @@
+The pdf schematic represents the current prototype or released design.  For the
+most recent design in development, refer to the KiCad files in ../hardware/.
+
+Technical documentation is being developed at:
+
+https://github.com/mossmann/fireflycap/wiki
diff --git a/doc/fireflycap-schematic.pdf b/doc/fireflycap-schematic.pdf
new file mode 100644
index 0000000..1212c2c
Binary files /dev/null and b/doc/fireflycap-schematic.pdf differ