MAX7219 Dot Matrix Module 4 In One Display with 5P Line Red/Green/Blue

Model: MAX7219 Dot Matrix Module 4 In One Display with 5P Line Red/Green/Blueএই প্যাকেজে আছে ৪টি MAX7219 Dot Matrix Module একসাথে ব্যবহার করার সুযোগ।A typical single color 8×8 dot matrix unit has 16 pins, 8 for each row and 8 for each column. The reason for all rows and columns being wired together is to reduce the number of pins required. If this were not the case, an 8×8 dot matrix unit would require 65 pins, one for each LED and one for a common anode or cathode connector. By wiring rows and columns together, only 16 pins are required. This technique of controlling a large number of LEDs with fewer pins is called Multiplexing. In this technique, each column is activated for a very short period of time and at the same time LEDs on that column are lit by addressing the corresponding row. The columns are switched so fast (hundreds or thousands of times a second) that the persistence of the human eye perceives the display to be fully lit. Therefore only a maximum of eight LEDs are lit at a time.The annoying thing about multiplexing is that you need to use 8 power transistors and you have to constantly refresh the display to keep the image stable. However, the MAX7219 Chip does all the control and refresh work for you. All you have to do is send it serial commands through the 4-pin SPI interface and it will automatically take care of the rest. Features:Cascaded four 8×8 RED common cathode dot matrix LED Working voltage: 5V4 fixing screw holes each dot matrix 16 holes in total, hole diameter: 3mm Module with input and output interfaces, support for cascading multiple modules Dimension: 12.8 x 3.2 x 1.3 cm (L*W*H) আরও জানতেঃComplete Guide: https://www.instructables.com/id/User-Manual-MAX7219-Dot-Matrix-4-in-1/Download LED Driver: https://github.com/wayoda/LedControl/releasesExplained Video: https://www.youtube.com/watch?v=SIlLj4thysoCheck out our website for other displays here Keep an eye on our website to avail the –MAX7219 Dot Matrix Module best price in BD (Bangladesh)