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7-segment LED display types

7-segment LED display types - Arduino Tutorial

From the course: Learning Arduino: Interfacing with Hardware

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7-segment LED display types

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- [Narrator] There are two common types of 7-segment LED, a common cathode and a common anode. Let's examine the difference between each type. Remember that each LED within the 7-segment is an individual LED that has a cathode and anode side. A common anode type simply means having a common power supply VCC for the 7-segment LED, as you can see. This means that all LEDs inside the 7-segment display share the same voltage source and have a common anode side. So for the common pin, this is connected to the voltage supply according to the voltage limitation for each 7-segment LED component. Since all the anode connections of the LEDs are joined together to the VCC, this means their regular state is one high. And the individual LEDs are illuminated by connecting the individual cathode side to a low signal. So we send low in order to turn each LED on. For the common cathode, all LEDs have a common ground, a common cathode…

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