python">import PCF8591 as ADC
import time
        
if __name__ == '__main__':
    ADC.setup(0x48)
    try:
 		#读取AIN0通道上模拟信号转化成数字信号的值，范围是0~255
        print('Value:', ADC.read(0))  
        time.sleep(0.3)
    except KeyboardInterrupt: 
    	pass
    finally:
	    ADC.write(0)