Tag Archives: arduino basics

Dot Matrix 8×8 Make a cheap and good looking LED matrix Things used in this project Hardware components Arduino Nano R3 × 1 LED (generic) × 1 OSH Park Custom fabricated PCB × 1 Software apps and online services Arduino IDE Hand tools and fabrication machines Soldering iron (generic) Story Theory of LED dot matrix display In a dot matrix display, multiple LEDs are wired together in rows and columns. 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. By wiring all the anodes together in rows (R1 through R8), and cathodes in columns (C1 through C8), the required number of I/O pins is reduced to 16. Each LED is addressed by its row and column number. In the figure below, if R4 is pulled high and…

Read more

1/1