Two Input OR Gate
Category: Logic Gates
Designer: RANA MUHAMMAD ADNAN KHALIL
Notes
This circuit is designed and simulated in Proteus 7.10. In this circuit you will learn how to make OR gate practically. 1. This is a two input OR gate circuit. 2. The truth table of OR gate is: In 1: In 2 : Out 0 : 0 : 0 0 : 1 : 1 1 : 0 : 1 1 : 1 : 1 3. From the above truth table we can see that if any input of OR gate is logic one (1) then output is logic one (1). 4. The output is logic zero (0) only when all inputs are logic zero (0). 5. Here logic one (1) means 5V and logic zero (0) means 0V or ground. 6. Both circuits (left and right) are identical. 7. The left circuit is made to understand the logics; while right circuit is made using practical approach that is how to make logic zero and logic one. Application: 1. This circuit is used to understand the working of OR gate. 2. This circuit is used when you don't have OR gate IC and you need OR gate. Download these files for performing more experiments.