Feature(may vary by option.)
●The MAX7219 is compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs.
●Included on-chip are a BCD code-B decoder, multiplex scan circuitry, segment and digit drivers, and an 8x8 static RAM that stores each digit.
●Only one external resistor is required to set the segment current for all LEDs. A convenient 3-wire serial interface connects to all common µPs. Individual digits may be addressed and updated without rewriting the entire display.
●The MAX7219 also allow the user to select code B decoding or no-decode for each digit.
●The devices include a 150µA low-power shutdown mode, analog and digital brightness control, a scan limit register that allows the user to display from 1 to 8 digits, and a test mode that forces all LEDs on.
[Red]
[Green]
Description
Features
1.10MHz Serial Interface
2. Individual LED Segment Control
3. Decode/No-Decode Digit Selection
4. 150µA Low-Power Shutdown (Data Retained)
5. Digital and Analog Brightness Control
6. Display Blanked on Power-Up
7. Drive Common-Cathode LED Display
8. 24-Pin DIP and SO Packages
MAX7219 Dot Matrix Module
32x8 4 in 1 Green
Parameters:
1. A single module can drive a total of 8 * 8 dot matrix overcast
2. Working voltage: 5V
3. Size: *12.8 cm*3.2 cm *1.3 cm (L*W*H)
4. With 64 fixing screw holes, diameter 3mm
5. module with input and output interfaces, support for cascading multiple modules
- Package included: 2x MAX7219 32x8 LED Matrix 4-in-1 Module (Green)
- Package included: 2x 20CM Dupont line 5Pin (2 colors random)
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8×8 Dot Matrix DisplayA typical single color 8×8 dot matrix unit has 16 pins, wiring rows and columns together, 8 for each row and 8 for each column. This technique of controlling a large number of LEDs with fewer pins is called Multiplexing. |
MAX7219 ChipEnter the mighty MAX7219 Chip, which does all the control and refresh work for you. It can fully control 64 individual LEDs – including maintaining the same brightness, and allowing you to adjust the brightness of the LEDs with hardware or software (or both). All you have to do is send it serial commands through the 4-pin SPI interface. |
Wiring Instructions1. The left side of the module as an input port, an output port on the right. 2. If a single control module, simply input port connected to CPU 3. cascading multiple modules, input and output termination CPU, input the output end of the second module of the first module, the first two modules of the first three input termination module, and so on. |
The breakout pins at one end of the module are used for communication with the microcontroller
VCC--connects to 5V. Due to the high current draw of the display (up to 1A, if the brightness is cranked all the way up), it is recommended to run it directly from the external power supply instead of the 5V supply from the for Arduino. Otherwise, be sure to keep the brightness below 50%, so that the for Arduino voltage regulator does not overheat.
GND--connects to the common ground.
DIN--is the Data In. Connect it to any digital pin of the microcontroller.
CS/LOAD--is Chip Select (sometimes labeled as LOAD). Connect it to any digital pin of the microcontroller.
CLK--is the Clock pin. Connect it to any digital pin of the microcontroller.
The breakout pins at the other end of the module are used when you want to daisy-chain displays
VCC--Connects to 5V on next module.
GND--Connects to GND on next module.
DOUT--is Data Out and connects to the DIN pin of the next module.
CS/LOAD--Connects to CS / LOAD on next module.
CLK--Connects to CLK on next module.
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| WS2812B 5050 RGB 8 LEDs | WS2812B 5050 RGB 8x8 | MAX7219 8x8 Red | MAX7219 32x8 Red | TM1637 4-Digit Red | |
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| Price | — | — | $11.99 | $11.99 | — |
| Emitting Color | RGB | RGB | Red | Red | Red |
| IC | WS2812B | WS2812B | MAX7219 | MAX7219 | TM1637 |
| LED Quantity | 8 LEDs | 8x8 64 Pixels | 8x8 64 Pixels | 32x8 256 Pixels | 4-Digit 7 Segment LED |