diff --git a/.gitmodules b/.gitmodules
index d46dd1a..74b8df2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "kicad/libs/Connectors_JST.pretty"]
 	path = kicad/libs/Connectors_JST.pretty
 	url = https://github.com/KiCad/Connectors_JST.pretty.git
+[submodule "arduino/Switch"]
+	path = arduino/Switch
+	url = https://github.com/blackketter/Switch.git
diff --git a/arduino/Makefile b/arduino/Makefile
index da8a1e6..e51ec98 100644
--- a/arduino/Makefile
+++ b/arduino/Makefile
@@ -1,6 +1,6 @@
 BOARD_TAG    = nano328
 #ARDUINO_LIBS = LiquidCrystal
-ARDUINO_LIBS = StepperDriver
+ARDUINO_LIBS = StepperDriver Switch
 
 ARDMK_DIR:=$(HOME)/git/Arduino-Makefile
 
diff --git a/arduino/Switch b/arduino/Switch
new file mode 160000
index 0000000..8771608
--- /dev/null
+++ b/arduino/Switch
@@ -0,0 +1 @@
+Subproject commit 8771608c824ca13d83b661557345f947de2c7f55