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Cascaded big 7 segment digits

If you need really big 7 segment LED display, you may want to build 6” size display modules that can be cascade connected in row up to eight digits.

7-segment-big.jpg

 

Each module is controlled by PIC16F876A microcontroller and LEDs are driven by ULN2803 Darlington array chip, because one port needs to light 14 bright LEDs what consumes higher currents than port can handle. Project files and CCS C compiler example program are available for download.

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