Saturday, February 7, 2015

Circuit Schematic Serial 4-Digit Seven Segment LED Display using MAX7219 Driver Chip

Robotronicdiagram. - Here is Circuit Schematic Serial 4-Digit Seven Segment LED Display using MAX7219 Driver Chip. In here we will show you this circuit schematic that completed with download PCB.

Circuit Schematic


Figure 1. Serial 4-Digit Seven Segment LED Display
(Source: www.electronics-lab.com)

Component List

  1. MAX7219
  2. Capacitors
  3. Resistors
  4. Seven Segment
Description

Circuit Schematic like in figure 1 above is Serial 4-Digit Seven Segment LED Display using MAX7219 Driver Chip. This project is a 7 segment LED display module that can be driven using SPI protocol, so it needs only 3 pins of your mcu to drive 4 x LED displays. It's based on MAX7219 LED display driver.

Seven segment LED displays are very popular for displaying numeric information because they are very attractive and readable from a far distance and wider viewing angle.

The downside is they are resource-hungry. For example, it requires 12 I/O pins of a MCU to drive a 4-digit seven segment display using a standard time-division multiplexing technique.

Here I present a serial seven segment LED display module that can be used with any MCU using a 3-wire SPI interface. This particular display has four digits (0.40” size) and two colon segments (to support time display) display.  




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