Present and future scope of electronic letter box

abstract

Electronic Letter Box Project has been developed for users to know whether a letter is inside the letter box and to display the number of letters within the letter box. An IR transmitter and receiver letter is attached on the opening of the box. In normal operation, a ray transmitted from the transmitter falls on the receiver when a letter enters the letter inside the box, then the letter hides the rays and thus there is no indication on any particular instance. So it is the sensation that there is a letter inside. The microcontroller associated with the sensor believes that there is a letter inside. When the next letter is placed inside the letter box, the sensor understands the letter and the microcontroller two is counted. In the same way all these letters are counted inside. A display and buzzer is connected inside the house. The owner of the house can identify the number of letters within the letter box. When the letter box is opened, the microcontroller resets and the count becomes zero