There are many blogs and write-ups you may have read about the logic gate and operation. The AND, NAND and other types of gate and their operations, you know. Therefore, in this post, we will discuss the **OR gate**, its function, and what output it will deliver. However, we recommend you to read about the Boolean value and the logic operation.

Remember that the logic gate acts as a building block that works different logical operations in an electrical circuit. According to this logic gate, continue reading this post to know what input and output values will be.

Table of Contents

# 4 Facts You Should Know about an OR gate

## 1. Two inputs

Basically, OR gates have two inputs; let us assume them as A and B. The output will be on if A=1 B=1 or either of them is 0 and 1. However, if both inputs are off, then the final output is also ‘off’. To understand this principle in an easier manner, we recommend you draw a truth table. The truth table is a set of rows and columns that enlists the truth and false values. As a result, you will be able to know the possible combinations of the output.

## 2. Use in an electronic circuit

Primarily, the OR gate is used in an electronic circuit, which delivers a higher output. Furthermore, it is used in devices that have one or more input ‘true’. The basic reason behind using this gate is to figure out the maximum outputs after adding the binary input in the logical operation. This kind of Boolean algebraic operation is used in transistors and metal oxide semiconductors.

Doorbells have this logic gate. Not just that, but even in the industries, they used devices to measure the temperature. These devices have circuits that also have the OR gate. Moreover, sensors that detect faults in industrial segments also have these OR gates. These sensors signal and give alerts if any false occurs. As a result, industrial owners get a signal for an emergency shutdown which saves them from disastrous consequences.

## 3. What is the difference between OR, Ex-OR, AND

The language OR and ‘AND’ is itself different. In ‘OR’, you have options to choose either of them. Whereas, the ‘AND’ gives a combination of results. The major difference between logic gates is that the AND gate multiplies the digital input, whereas the OR logic gates add them. Now, for the next example, we will discuss the **Ex-OR GATE** (XOR).

As mentioned above, OR gate requires at least two values ‘true’ to operate. On the other hand, the XOR output is the same if exactly one input is true. If you are thinking that there is any device which combines all these logic gates, then you are correct. It is because CPU (Central Processing Units) combine AND, XOR, OR and many other logic gates. They are found in the circuit board to run the computational and logical operations in the system.

## 4. Practice with diagrams

If you are in class 12th and studying Physics, then electricity chapters contain plenty of logic gates diagrams. Taking the example of the OR gate, its shape is like a curved triangle or the bullet with two input lines and one output line. Before reading theoretical concepts, we suggest you practice as many diagrams as possible. It is because, in boards or any other competitive exam, diagrammatic questions will come.

Thus, practicing more diagrams are crucial, and you can excel in the examination as well. Remember, understanding this logic gate is very simple and does not take much time to revise.