diff --git a/.gitmodules b/.gitmodules
index 39af5f0..d37de85 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -25,3 +25,6 @@
 [submodule "encoder-test-bench"]
 	path = encoder-test-bench
 	url = https://git.tdehaeze.xyz/tdehaeze/encoder-test-bench
+[submodule "test-bench-piezo-amplifiers"]
+	path = test-bench-piezo-amplifiers
+	url = https://github.com/tdehaeze/test-bench-piezo-amplifiers
diff --git a/test-bench-piezo-amplifiers b/test-bench-piezo-amplifiers
new file mode 160000
index 0000000..08cb2b8
--- /dev/null
+++ b/test-bench-piezo-amplifiers
@@ -0,0 +1 @@
+Subproject commit 08cb2b8daa856d27d9677ad76234f94795b5eec8