In order for a segment to light up, the corresponding cathode terminal will be grounded and the common anode terminal is provided with +5V source voltage. In this type, all LEDs share a common anode terminal while each cathode terminal is connected to a different segment. Please refer to this link for 7-segment Display MCQs 7 Segment Display Common Anode: There are two main types of 7-segment displays: The only difference is that they have 8 pins rather than 2 pins because each of the 7 LEDs has its own pin along with a common cathode or anode pin. in series with a current limiting resistor). 7-segment displays are connected to the microcontroller in the same way as LEDs (i.e. Pin10 (g): This pin is used to control the middle LED of the displayħ Segment Displays which have 7 LEDs are arranged in a way that can display numbers from 0-9.Pin9 (f): This pin controls the top left LED of the display.Pin8 (Com): This pin is connected to Vcc/GND based on display type.Pin7 (a): This pin is used to control the topmost LED of the display.Pin6 (b): This pin controls the top right LED of the display.Pin5 (DP): This pin controls the decimal point LED of the display.Pin4 (c): This pin controls the right bottom LED of the display.Pin3 (Com): This pin is used to connect to Vcc or Ground-based on display type.Pin2 (d): This pin is used to control the bottom-most LED of the display.Pin1 (e): This pin is used to control the left bottom LED of the display.
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