Hello every body welcome back . In today's arduino blog I am going to show you how you can make a automatic door opening system when some one wants to enter your room the PIR motion sensor detects the motion of moving body and sends signal to arduino and motor just move in anticlockwise direction to open the door and after man enter the room the door will automatically closed . This concept is used to open door of Lift System . And you can make other device that uses this concept . In second part we will add another feature to so that this device can also count number of visitor entered and leave the room . Now let's first connect your hardware as shown in figure above and edit , compile and upload the hex file of this code to your Arduino Uno board you can download complete project file from this link automatic door opening part 1 .And short description is shown below the code .