diff --git a/ESP-IDF_Robot/main/motor_controls.h b/ESP-IDF_Robot/main/motor_controls.h
index 7ba9b30b3..7a195630b 100644
--- a/ESP-IDF_Robot/main/motor_controls.h
+++ b/ESP-IDF_Robot/main/motor_controls.h
@@ -2,6 +2,12 @@
 #define MOTOR_CONTROLSC_H
 
 // Interpolate value (x) based on raw reading, min/max limits.
+/*
+
+    8191    4095
+            0
+    0       -4095
+*/
 static int interpolate_raw_measure (int min, int max, int raw) {
     int x;