Tag Archives: Serial LED display


Soldering the SPI7SEGDISP8.56 serial 8-digit seven segment LED display kit

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SPI7SEGDISP8.56 is a MAX7219 based serial 8-digit seven segment LED display module. With this display module, you can easily add 8 digits of seven segment LED displays to your project using only 3 I/O pins, and provides full control of all the digit segments including decimal points. You can even cascade two or more of these modules together without sacrificing any extra I/O pin. You can buy SPI7SEGDISP8.56 display kit on Tindie for only $12.00. SPI7SEGDISP8.56 PCB is double layer. The top layer consists of two 4-digit CC LED display modules (Disp1 and Disp2) arranged in a row and header connectors (JP1 and JP2), whereas the bottom layer is one where the MAX7219 chip and other passive components reside.

Assembled SPI7SEGDISP8.56 board top and bottom view

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Introducing a new serial (SPI) 8-digit seven segment LED display module using MAX7219

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Seven segment LED displays are brighter, more attractive and provide a far viewing distance as well as a wider viewing angle as compared to LCD displays. The major drawback of using seven segment LEDs is they are resource-hungry. Time-division multiplexing is the most common technique of interfacing 7-segment LEDs to microcontrollers. With this technique, an 8-digit seven segment LED display with the decimal point requires at list 16 I/O pins of the microcontroller, which is quite a lot. Consequently, their use with low pin-count microcontrollers (such as PIC12F series) is not practically feasible. Here’s our latest version of the MAX7219 based serial seven segment LED display module (SPI7SEGDISP8.56) that will allow you to add 8 digits of seven segment LED displays to your project using only 3 I/O pins, and provides full control of all the digit segments including decimal points. You can even cascade two or more of these modules together without sacrificing any extra I/O pin. SPI7SEGDISP8.56 display kit is also available for purchase on Tindie for $12.99.

SPI7SEGDISP8.56: 8-digit serial seven segment LED display

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