I'm working with a 2.3" 7 segment and it will not light up. I can handle evey thing else once I get 1 segment to light up.
http://www.flickr.com/photos/51037744@N06/
You'll see wires go from pins 1 and 5 (red wires) to a bread board. The 3 green wires between them are pins 2-4 and also go to the breadboard.
From there, the green wires pass through a 180 ohm resistor and then exit to a digital pin in the arduino mega.
Power for the 7 segment comes from the arduino comes from the 5v out.
I have only wired the bottom of the 7 segment display because if it works, I'm going to flip the bread board to go behind the display and then loop the other wires around from the top.
Two questions... does the 7 Segment display take 5v from the arduino or does it need separate power?? Also, I've coded something on the arduino that turns pins on... But they don't turn on... so now what?
int ledPin31 = 31; // LED connected to digital pin 31
void setup() {
// initialize the digital pin as an output:
pinMode(ledPin31, OUTPUT);
}
void loop()
{
digitalWrite(ledPin31, LOW);
}
Here is a link to the 7 segment data
Also, I'm using an arduino mega, but the wireless shield on top of it has been taken off (even though it's on in the photos).