diff --git a/ESP-IDF_Robot/main/blink_example_main.c b/ESP-IDF_Robot/main/blink_example_main.c
index 2d694f54f..adb2dbe31 100644
--- a/ESP-IDF_Robot/main/blink_example_main.c
+++ b/ESP-IDF_Robot/main/blink_example_main.c
@@ -27,7 +27,7 @@ static const char *TAG = "ESP IDF Robot";
 #define LEDC_MODE               LEDC_LOW_SPEED_MODE // LEDC_LOW_SPEED_MODE
 #define LEDC_OUTPUT_IO          (5) // Define the output GPIO
 #define LEDC_CHANNEL            LEDC_CHANNEL_0
-#define LEDC_DUTY_RES           LEDC_TIMER_10_BIT // Set duty resolution to 13 bits
+#define LEDC_DUTY_RES           LEDC_TIMER_10_BIT // 2**10
 //#define LEDC_DUTY               (2048) // Set duty to 50%. (2 ** 13) * 50% = 4096 1024
 //#define LEDC_DUTY               (1024)
 #define LEDC_DUTY               (1000)