3Pcs MAX7219 Red 8 Bit Digital Tube LED Display Module

Description MAX7219 is an integrated serial input output common cathode display drivers which connects the microprocessor and 8 bit 7 segment digital LED display you can also connect a bar graph display or 64 separate LED Includes an on chip type B BCD encoders multi channel scanning loop segment word driver but also a 8x8 static RAM that stores each data Only one external register is used to set the current of each LED segment A convenient four wire serial interface can connect all common microprocessor Each data can be addressed in the update without rewriting all displays MAX7219 also allows the user to select each data encoding or no coding The entire device includes a 150A low power shutdown mode analog and digital brightness control a scan limit register allows the user to display 1 8 bit data there is an all LED light detection mode Feature 0 36 inchCommon cathodeOnly need three IO ports can drive 8 bit digital tubeThe module compatible of 5V 3 3V microcontroller 51 AVR STM32 PCV board four corners of the fixed copper stud which can effectively precent short circuit accidents happenWiring instructions a program for example you can pick any IO port definition can be modified in the program VCC to 5V GND to GND DIN to P00 CLK to P02 CS to P01Note VCC and GND do not reversed it would burn the chip 51 MCU P0 port requires pull up resistor if your device does not have a pull up resistor can be connected to other ports data lines Package i