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Step 3So How It Works?
This kind of display calls for a large amount of pins to power it out so a special technique is needed.
I used multiplexing.
Multiplexing works by switching between the digits one by one very fast and by so creating a illusion that all of the displays are working in the same time.
This works by connecting each segment to the same one on a different digit and by so you will have only seven segments that are all the same for all the digits.
And you can choose what digit you want to power by connecting the negative leads of the display to ground and sending the data to the positive segment leads.
The scanning of the display is accomplished by the 4017 decade counter because I wanted to save some pins on the arduino, to control it you will need just 2 arduino pins.
The 4017 connects the grounds one by one and by so it scan the display.
I used multiplexing.
Multiplexing works by switching between the digits one by one very fast and by so creating a illusion that all of the displays are working in the same time.
This works by connecting each segment to the same one on a different digit and by so you will have only seven segments that are all the same for all the digits.
And you can choose what digit you want to power by connecting the negative leads of the display to ground and sending the data to the positive segment leads.
The scanning of the display is accomplished by the 4017 decade counter because I wanted to save some pins on the arduino, to control it you will need just 2 arduino pins.
The 4017 connects the grounds one by one and by so it scan the display.
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