Drive a 7-Segment LED with an Arduino

In order to multiple 7-segment LED… How can we do a dedicated 7-segment LED driver?
Thanks.

Hi,

I was also having trouble with this code. After a little bit I finally got it working and submited a pull request on GitHub but apparently they don’t accept requests very often.

If you’re having trouble, feel free to try my version on https://github.com/karlalopez/Make-Projects/tree/master/_7_segment

Cheers!

the code is full of bugs pfff

I was looking for a good starting point for lighting up a similar LED that I had wanted to use on a project (with potentiometer, sound, and servo motor). The project turned out well, but I ended up scrapping this code and wanted to give a respectful warning to others that this code will need a little work, so be prepared.

Firstly, it won’t compile as-is with the couple of typos it has.

In my case, my LED uses HIGH to light up (as you might expect), so bear this in mind.

From an efficiency standpoint also you may want to consider encapsulating some of the digitalWrite logic so that there are not as many lines of redundant code.

I’d be curious to see what Mr. Frog (commenter below) had done. I ended up overdoing it a little with a way to pass the on/off codes as a string encoding, but this is a good talking point for any student learners.

e.g.

void light_all() { drawLEDfromArray( “11111111” ); }
void clear_all() { drawLEDfromArray( “00000000” ); }
void char_A() { drawLEDfromArray( “11101110” ); }

void drawLEDfromArray( char bits[] ) {
// this lights up LED segments 0..8 when the correspond ing array item is ‘1’
for (int i=0; i < LED_segments ; i++)
if (bits[i] == '1')
light_on(LED_Pins[i]);
else light_off(LED_Pins[i]);
}

would it be possible to command 7 segment 0-9 in dosbox or cmd using notepad?