diff --git a/Core/Src/main.c b/Core/Src/main.c
index 3c51a14..d800c56 100644
--- a/Core/Src/main.c
+++ b/Core/Src/main.c
@@ -141,6 +141,7 @@ int main(void)
     // HAL_GPIO_TogglePin(LD2_GPIO_Port, LD2_Pin);
     HAL_Delay(1000);
     htim7.Instance->PSC = 100;
+    htim7.Instance->ARR = 170;
     /* USER CODE END WHILE */
 
     /* USER CODE BEGIN 3 */