In this tutorial, we will learn how to interface a 7 SEGMENT DISPLAY with Arduino. A 7 SEGMENT DISPLAY consists of 8 LEDs and 10 pins,2 common pins are shorted and supplied with 5 volts from Arduino through a resistor and other 8 pins are connected to digital and analog pins. 7 Segment Display can act as a substitute for LCDs if we want to display numbers. Shown below is the internal architecture of a 7 segment display. Now let’s interface the 7 SEGMENT DISPLAY. Components required Arduino Uno 1No. 7 Segment Display 1No. Resistors 1No. 100 ohms Connecting Wires Breadboard There are two types of LED 7-segment display The common cathode (CC) Common anode (CA) In CC type the cathode of all the LEDs is connected together and similarly in CA type. In CC type we have to ground the common cathode pin and power up segments to illuminate it, the reverse happens