Led Dot Matrix Display Circuit Diagram. This is done to minimize the number of pins required to drive them. For example a 8 8 matrix of leds shown below would need 64 i o pins one for each led pixel.
The desired character or graphics can be displayed by switching on off a desired configuration of led s. There is a led for each pixel and these leds are connected to total of 16 pins. Download the large led matrix display demo v1 0 example here.
Led dot matrix can be used in simple display applications where the resolution is not a big concern.
In this tutorial we are going to interface a single color 8 8 led matrix with arduino and display a few characters in it. For example a 8 8 matrix of leds shown below would need 64 i o pins one for each led pixel. Daisy chain all the completed and tested led matrix modules together to form a long led matrix display. Every column contains n led s so that the total current flowing through the column is the sum of current flowing through each led.
