It is a MAX7219 digital tube display module.MAX7219 is an integrated serial input/output common-cathode display driver.It connects a microprocessor and an 8-digit 7-segment digital LED display.It can also connect to a bar graph display or 64 independent LEDs.It includes an on-chip B-type BCD encoder,multiple scan loops,segment word drivers,and an 8*8 static RAM to store each data.There is only one external register used to set the segment current of each LED.
1).A convenient four-wire serial interface can be connected to all general-purpose microprocessors.Each data can be addressed without rewriting all the displays when updating.MAX7219 also allows users to select encoding or not encoding for each data.
2).The entire device includes a 150μA low-power shutdown mode,analog and digital brightness control,a scan limit register allowing users to display 1-8 bits of data,and a detection mode that allows all LEDs to emit light.
3).Only 3 IO ports are required to drive 8-bit digital tubes,and the digital tubes will not flicker when displayed,and support cascading.
4).The digital tube is connected with the PCB board with a 2.54mm pitch round hole pin header,which can easily replace the digital tube.
5).The four corners of the PCB board are fixed with copper studs,which can effectively prevent accidents such as short circuits.
1).Product Name:MAX7219 Digital Tube Display Module
2).Input Voltage:DC 3.3V/5V
3).Digital Tube Size:0.36 inch
5).Display Number:1-8 digits data
1).Don't connect VCC and GND reversely,so as not to burn the chip.
2).51 The P0 port of the single-chip microcomputer needs to be connected with a pull-up resistor.If your single-chip microcomputer is not connected with a pull-up resistor,you can connect the data line to other ports.
1).1pcs MAX7219 Digital Tube Display Module
2).1pcs 6-Pin Straight Pin
3).1pcs 5-Pin Looper
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