MAX7219 DIY Kits 1 single module can drive the an 8 * 8 dot matrix common cathode 2 the module Operating voltage: 5 v The Module 3 dimensions: length 3.2 cm X 3.2 cm wide X 1.3 cm high 4 holes with four screws, the diameter of 3 mm Five modules with input and output interfaces, support for cascading multiple modules Wiring instructions: 1 on the left block to an input port, the an output port on the right. 2 the When the control of a single module, simple enter the port received a CPU The When wining 3 modules cascaded output input termination CPU, the input output termination module of the first two modules of the first one, the first two modules of the termination input terminal of the three modules, and so. The To 51 single example: VCC 5 v GND GND DIN P2.2 CS P2.1 CLK P2.0 MAX7219 4 IN 1 Module A single module can drive a 8x8 dot matrix common cathode Operating Voltage: 5V A single module can drive a 8x8 dot matrix common cathode Operating Voltage: 5V Dimensions: 12.8X12.8X1.3cm/ Fixing screws with 64 holes with a diameter 3mm Module with input and output interfaces, support for cascading multiple modules Quality:1Set The left side of the module to the input port, the right to an output port When the control of a single module, simply input port connected to CPU When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on... 51 microcontrollers, for example: VCC 5V GND GND DIN P2.2 CS P2.1 CLK P2.0 MAX7219Digital Display ControlModule MAX7219 is an integrated serial input / output common-cathode display driver, which connects the microprocessor 7-segment digital LED display with 8 digits, you can connect a bar graph display or 64 independent LED. On which includes a B-type BCD encoder chip, multi-channel scanning loop, segment word driver, but also an 8 x 8 static RAM for storing each data. Only one external register is used to set the segment current for each LED. A convenient four-wire serial interface can connect all the general-purpose microprocessor. Each data can be addressed in the update does not need to rewrite all of the display. MAX7219 also allows users to select each data coding or non-coding. 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 bit data, there is a LED light all the detection mode. Only three IO ports to drive eight digital tube! Digital flicker-free display! Support cascade! PCB plate fixed to the four corners of copper studs, which can effectively prevent a short circuit accident occurs! Digital tube 0.36 inches four one common cathode LED This module is compatible with 5V / 3.3V microcontroller (51 / AVR / STM32 .......) Wiring instructions (in program provides an example, you can access any IO ports, you can modify the port defined in the program):