MAX7219 Dot Matrix Module DIY Kit SCM Control Module

Descriptions The MAX7219 is an integrated serial input output common cathode display driver that connects a microprocessor with an 8 digit 7 segment digital LED display or a bar graph display or 64 independent LEDs Which includes an on chip B type BCD encoder multi scan circuit segment word drive but also has a 8 8 static RAM used to store each data Only one external register is used to set the segment current for each LED A convenient four wire serial interface can be connected to all common microprocessors Each data can be addressed at the time of updating without having to rewrite all the displays The MAX7219 also allows the user to select or not code for each data The entire device contains a 150A low power shutdown mode analog and digital brightness control a scan limit register allows the user to display 1 8 bits of data and a test mode for all LEDs to emit light Only need 3 IO port can drive a dot matrix Dot matrix display without flicker Support cascade Notice These are the parts need to be soldered Module parameters 1 A single module can drive an 8 8 common negative lattice2 Module operating voltage 5V3 Module size 5 x 3 2 x 1 5 cm L W H 4 With 4 fixed screw holes aperture 3mm5 Module with input and output interfaces support multiple modules cascadeWiring instructions 1 The left side of the module is the input port and the right side is the output port 2 When controlling a single module only need to connect the input port to the CPU3 W