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MAX7219 Led Module 7 Segment Module


8-Digit 7 Segment Module MAX7219 8 Bit Digital Segment Tube LED Display Module Supports Cascade Eight Bit Serial 3 IO Ports for Arduino.

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MAX7219 Led Module Description:

MAX7219 Led Module 7 Segment Module Red Tube 8 Bit Digital Segment Tube LED Display Module Supports Cascade Eight Bit Serial 3 IO Ports for Arduino.

Integrated serial input / output common-cathode display driver, which connects your microprocessor to a 7-segment digital LED display with 8 digits.

  • The module is compatible of 5V / 3.3V microcontroller; Only three IO ports are use to drive the eight digit display.
  • Only three IO ports are use to drive the eight digit display. MAX7219 supports flicker free displays as well as cascading displays
  • PCV board four corners of the fixed copper stud, which can effectively percent short circuit accidents happen.
  • Wiring instructions a program, for example, you can pick any IO port definition can be modify in the program):
  • VCC to 5V, GND to GND, DIN to P00, CLK to P02, CS to P01; Digital tube is 0.36 inch 4-bit integrate cathode digital tube; Common cathode..
  • Note: 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 connect to other ports data lines.

    MAX7219 Led Module Experimental procedure:

    1. Use 4 male to female DuPont lines 4-digit digital display module Connect to Arduino, as shown in the following table and figure

    2. Connect the Arduino with mini USB. If you are using the motherboard for the first time,

  • its USB to serial driver can find the USB Drivers from the drivers in the Arduino IDE directory.

    3. Reopen the Arduino IDE and click the Open button on the toolbar to open the Number Flow routine in Digital Tube.

  • Select the serial port, board name, click the Burn button, you can burn. This routine can make 16 characters from 0~9, A, b, C, d, E, F, etc. flow from right to left.

    The function of adjusting the gray scale of the digital tube is the set, function in the class TM1637, and the input parameter is 0~7. The larger the number, the higher the brightness.

  • ¬†total of 4 pins (GND, VCC, DIO, CLK), GND is ground, VCC is the power supply, DIO is the data input and output pin, CLK is the clock signal pin;

    4-digit common anode with a 0.36-inch digital tube with a score point, highlight in red;

    4 M2 screw positioning holes, the hole diameter is 2.2mm.

    which makes the module easy to install and position, and realize the module combination;

    Overview of the library routines:

    1. Clock Display: Use the timer 1 of the MCU on the motherboard to time and let the 4-digit display display.

    2. Number Flow: 0~9, A, b, C, d, E, F and other 16 characters flow from right to left.

    3. Stop Watch: Use the timer 1 of the MCU on the motherboard to time, and use the button to realize the stopwatch function.

  • en.wikipedia.org
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