OR Gate Truth Table

In the previous topic, we discussed the AND gate. In OR gate truth table you can find even one truth state that will set the output to true. And these gates are mostly used for designing trip logic. For example in order to trip the motor case any one parameter abnormal should drive the trip circuit. In such cases, we use the OR gate to achieve the need.

The above diagram constructed using the simple wiring diagram will help you to understand the working of the OR gate.

• In diagram 1 the supply will not reach the lamp since both the switches are held in an open condition
• Next 2 diagrams the supply will pass through any one of the switches to drive the output.
• In the last case both the switch makes way for current to pass through and reaches the lamp. And the summary of input and output are given side by side in the above diagram

Now you may get a clear idea about the construction of the OR gate truth table using the real-time example.