Tag Archives: SPI seven segment display


MAX7219-based double row 4-digit seven segment LED display

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This display board (SPI7SEGDISP8.56-2R) features eight 7-segment displays arranged in two rows of four digits. The on-board MAX7219 driver enables you to control all LED segments through only 3 I/O pins of microcontroller. The major advantage of using this board is the time-division multiplexing operations required for continuous refreshing of the display digits are performed by the MAX7219 chip, thereby keeping the microcontroller free for doing other pressing tasks. The double row arrangement is suitable for many projects where two variable values are to be displayed simultaneously, such as displaying temperature and humidity, or current and voltage, etc.

SPI7SEGDISP8.56-2R: MAX719-based seven segment LED display module

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SPI7SEGDISP8.56 kit is now available with blue seven segment LED displays

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SPI7SEGDISP8.56 is a MAX7219 based serial seven segment LED display module that allows 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. The LED display size is 0.56″ and all 8 digits are arranged into two rows of four. SPI7SEGDISP8.56 display kit is now also available with blue LED color. You can buy one for $13.50 on Tindie.

SPI7SEGDISP8.56-1R module in blue color

SPI7SEgDISP8.56-1R Buying links:

SPI7SEGDISP8.56 buying link – Red color
SPI7SEGDISP8.56 buying link – Yellow color
SPI7SEGDISP8.56 buying link – Green color
SPI7SEGDISP8.56 buying link – Blue color

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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