There are a total of nine Input pins. Eight pins of port Pl of the microelectronic are corresponding to eight Inputs and one stop plan for resetting the buzzer system. On the output side a seven segment Is connected to display the corresponding output number.
There Is also a provision for sounding a buzzer for a small duration. When the system starts, the seven segment does not displays any output. The microelectronic keeps scanning the Input pins. As soon as any one of the Inputs Is pressed, the buzzer sounds for a small duration.
The seven segment displays the number corresponding to the Input pressed.Now even If any other Input plan Is pressed, there will be no effect on the system till the time the stop plan Is pressed to reset the system. Circuit Diagram: Merits: 1 . Affordable cost. 2. Circuit design Is easy.
Uses: 1. Used In quiz programs Display Technology and Candidate Quiz Buzzer By Assyrian This quiz buzzer system has eight input pins corresponding to eight teams. The connections of the seven segment, input pins and output pins is shown in the circuit diagram. There are a total of nine input pins. Eight pins of port Pl of the correlation are corresponding to eight inputs and one stop pin for resetting the buzzer system.On the output side a seven segment is connected to display the corresponding output number.
There is also a provision for sounding a buzzer for a output. The microelectronic keeps scanning the input pins. As soon as any one of the inputs is pressed, the buzzer sounds for a small duration. The seven segment displays the number corresponding to the input pressed. Now even if any other input pin is pressed, there will be no effect on the system till the time the stop pin is 2.
