Join Zahraa Khalil for an in-depth discussion in this video 7-segment LED display types, part of Learning Arduino: Interfacing with Hardware.
- [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 side.…Knowing the differences between the two types…helps in wiring as well as in coding.…So for the common cathode,…
- Interfacing with an LCD screen
- Wiring and coding the LCD interface
- Displaying random numbers on the LCD
- Interfacing with a seven-segment LED component
- Cycling through LEDs
- Using a shift register to interface with a seven-segment LED
- Interfacing with a keypad
- Combining the LCD, keypad, and LED
Skill Level Intermediate
The devices used38s
1. Interface with an LCD
2. Interface with a 7-Segment LED Directly
3. Interface with a 7-Segment LED Using a Shift Register
4. Interface with a Keypad
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