When it comes to electronic displays, there are two main types: common anode and common cathode. While they may seem similar, there are some key differences between the two that can affect their performance and usage. In this article, we will explore the differences between common anode and common cathode displays and help you determine which one is best for your project.
What is a Common Anode Display?
A common anode display is a type of electronic display where all the anodes of the individual LEDs are connected together and supplied with a positive voltage. The cathodes of each LED are then connected to individual pins, allowing for individual control of each LED. This type of display is commonly used in seven-segment displays, where each segment can be turned on or off individually.
What is a Common Cathode Display?
A common cathode display, on the other hand, is a type of electronic display where all the cathodes of the individual LEDs are connected together and supplied with a negative voltage. The anodes of each LED are then connected to individual pins, allowing for individual control of each LED. This type of display is also commonly used in seven-segment displays.
Differences Between Common Anode and Common Cathode Displays
The main difference between common anode and common cathode displays lies in the way they are controlled. In a common anode display, the anodes are connected together and supplied with a positive voltage, while in a common cathode display, the cathodes are connected together and supplied with a negative voltage. This means that in a common anode display, the individual LEDs are turned on by applying a negative voltage to their respective cathodes, while in a common cathode display, the individual LEDs are turned on by applying a positive voltage to their respective anodes.
Another difference between the two types of displays is their power consumption. Common anode displays tend to consume less power than common cathode displays, as they only require a single power source for all the anodes. Common cathode displays, on the other hand, require a separate power source for each cathode, which can lead to higher power consumption.
Which One Should You Use?
The choice between a common anode and common cathode display ultimately depends on your project’s specific needs. If you need individual control over each LED, a common anode display may be the better option. However, if you are looking for a display with lower power consumption, a common cathode display may be the way to go.
Conclusion
In conclusion, common anode and common cathode displays may seem similar, but they have some key differences that can affect their performance and usage. Understanding these differences can help you determine which type of display is best for your project. Whether you choose a common anode or common cathode display, both are versatile and widely used in various electronic applications.
