Encompasses a convenient 4-wire serial interface (4-pin SPI interface) to connect to all common microprocessors. Useful Links: (copy into a new browser window).
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MAX7219 CWG 8-Digit Digital Tube Display Control Module Red Three IO for Arduino
Aliexpress UK
Single module can drive an 8 8 dot matrix common cathode. On the left block to an input port, an output port on the right. Modules with input and output interfaces, support for cascading multiple modules.
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MAX7219 Dot Matrix Module Microcontroller Module 4 In One Display
Aliexpress UK
MAXIM - MAX7219CNG.
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MAX7219 Dot Matrix Module Microcontroller Module Display Module Finished For Arduino
Aliexpress UK
IC MAX7219CNG MAX7219 DIP-24 DRIVER LED DISPLAY 8DGT DIP. 2 PCS IC MAX7219CNG MAX7219 DIP-24 DRIVER LED DISPLAY 8DGT DIP.
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DIYUSER TM1637 4 Bits/TM1638/MAX7219 8 bit Digital LED Display 7 Segment 0.36Inch Clock RED Anode Tube Four Serial Driver
Aliexpress UK
10MHz Serial Interface. SPI, QSPI, MICROWIRE Serial Interface (MAX7221). Drive Common-Cathode LED Display. Display Blanked on Power-Up.
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1/5PCS 8x8 8*8 MAX7219 Dot Led Matrix Module MCU LED Display Control Module For Arduino 5V Interface Module Common Cathode
Aliexpress UK
A single module can drive a 8x8 dot matrix common cathode. The left side of the module to the input port, the right to an output port. module with input and output interfaces, support for cascading multiple modules.
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MAX7219 Dot Matrix Module 32x8 4 in 1 LED Display Modules Drive with 5Pin Wires for Arduino Raspberry Pi
Aliexpress UK
A single module can drive a 8x8 dot matrix common cathode. The left side of the module to the input port, the right to an output port. Module with input and output interfaces, support for cascading multiple modules.
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MAX7219 0.36 Inch 5 Bits Digital LED Display 7 Segment Module 5 Color Available for Arduino STM32 STC AVR ESP32 Welded
Aliexpress UK
Only three IO ports are used to drive the eight digit display. MAX7219 supports flicker free displays as well as cascading displays. You you can use it for Arduino. VCC and GND should not be connected reversed, so as not to burn the chip.
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MAX7219 Dot Matrix Module 8*8 Common Cathode 5V, Red and Green 4 in One LED Display with DuPont Line, 1 Bit Display Module
Aliexpress UK