Common Anode 7 Segment Display Circuit Diagram. As shown in the above image of a 7 segment display it consists of 8 leds each led used to illuminate one segment of unit and the 8 th led used to illuminate dot in 7 segment display. Since the 4 digit 7 segment display used in the second circuit is of common anode type we need to drive the led segments through the common terminals.
The common anode display is commonly called ca display. In common anode display all the anode pins are connected together to high pin or logic 1. Even though the internal structure of both common anode and cathode appears the same as the name suggests in common cathode seven segment display one side i e the cathode part of all the eight light emitting diodes is shorted together and connected to the ground gnd.
We can refer each segment as a line as we can see there are 7 lines in the unit which are used to display a number.
Since the 4 digit 7 segment display used in the second circuit is of common anode type we need to drive the led segments through the common terminals. Digital counters are needed everywhere in this digital world and 7 segment display is one the best component to display the numbers. A 7 segment led display consists of an arrangement of 8 leds such that either all the anodes are common or cathodes are common. A common cathode 7 segment display consists of 8 pins 7 input pins labeled from a to g and 8 th pin as common ground pin.
