diff --git a/c/sensor.c b/c/sensor.c
new file mode 100644
index 0000000..a2f8384
--- /dev/null
+++ b/c/sensor.c
@@ -0,0 +1,5 @@
+int clamp_sensor(int value) {
+    if (value < 0) return 0;
+    if (value > 100) return 100;
+    return value;
+}