Dot led matrix display module is a display board arranged in series from four 8 x 8 Dot Matrix which can print characters using LEDs or the group of LEDs. Another most interesting thing about it is the cheap price, easily available in the market, and easy to interface with microcontrollers. this display made of 32 columns and 8 rows of LEDs. So it has total of 32×8 = 256 numbers of LEDs. Each 8×8 LED matrix has a MAX7219 common-cathode display driver IC with serial input and parallel output. So the display module has four MAX7219 display driver IC. Which is make the display easier to control using a microcontroller and microprocessor. These matrix display modules are made of four 8×8 common cathode matrix. Each LED matrix has 8 rows of LED and 8 columns of LED, so each matrix has a total of 8×8 =64 numbers of LED. This matrix has the LEDs anodes are connected across rows (8 pins) and the LEDs cathodes are connected across columns (8 pins each), it means every display has total of 16 pins to control the LEDs. So, the 4 in 1 dot led matrix display module to consist of 32 columns and 8 rows of LEDs. So it has a total of 32 x 8 = 256 numbers of LED. Which make it bigger and space full to print characters.
|Input Voltage||3.7 to 5.3 V|
|Input Current||320 mA|
|Driver Chip||four MAX7219|
|8×8 matrix||four 1088AS|
|8×8 matrix wavelength||625 ~ 630nm|
|PCD Dimensions||128 x 32 x 1.5cm(LxWxH)|
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