Common Anode and Cathode seven segment display
Seven segment displays are very commonly used today. You can see them on different electronic devices. They are used to display time in digital watches display speed of automobile in old cars You can see them on old buffers etc. Though there use is tremendously decreased due to the invention of lcd's. But they are in used today in many appliances.Seven segment display contains 7 leds in it. Which are toggled to make a specific number. Maximally you can display 9 on one seven segment.
Types of seven segment display
Common Anode 7-Segment Display
Common Cathode 7-Segment Display
Some Projects Related to Seven segment displays and their interfacing with different microcontrollers.