/*Ultrasonic obstacle avoidance C program based on A60S2 Obstacle avoidance function achieved through PWM speed regulation Since only one ultrasonic wave is used, the obstacle avoidance flexibility is
The voltage regulator is under the following conditions: input voltage 220V, 50Hz, voltage variation range +15% to -20%: a. The adjustable output voltage range is +9V to +12V b. The maximum output cur