W09439ASX22 W09439ASX22_Bebe Led-Matrix-Display

Basically DOT matrix is a LED Display arranged in such a way that to turn the led (x, y) it takes a combination of voltage between Pin row & column. LED dot matrix is a very popular means of displaying such information that allows both static and animated text and images. I found them at gas stations displaying gas prices, or in public places and along the highways, showing ads on large dot matrix panels. In this experiment, I use a monochrome (single color) LED dot matrix and interface with a microcontroller to display static characters and symbols. It may include animation stuff. cool, pcbway send eleven pieces. bonus none pieces. of course free PCB 3x7cm 2x8cm in box. In the dot matrix display, some LEDs are wired together in rows and columns. This is done to minimize the number of pins needed to drive them. This 10 × 10 matrix LED will require 100 I / O pins, one for each pixel LED. By wiring all the anodes together in rows (R1 ... R10), and the cathode in the column (C1 ... C10), the required number of I / O pins is reduced to 20. Each LED is addressed by row and number of columns. In the figure below, if R4 is drawn high and C3 is pulled low, the LED in the fourth row and the third column will be turned on. Characters can be displayed by either a quick scan of rows or columns.