I purchased the 7-segment LED with the 4-pin backpack and I'm unable to get them to light up.
I've followed all the directions on the site:http://learn.adafruit.com/adafruit-led- ... t-backpack
Here's where I'm at:
1. The program compiles error free.
2. After uploading it to my arduino I check the serial monitor and it outputs "7 Segment Backpack Test" - So the program appears to be working and uploaded to my arduino. I hit reset and it pops out another "7 segment..." line. It works.
3. There are only 4 pins and I've wired them, re-wired them, again and again to make sure I did not do a silly mistake... nothing makes these things light up.
4. I've checked all my soldering, went back and touched up the soldering to make sure all is just dandy... still no lights.
I've attached a photo too!
Is there a simple way to de-bug this? Is there anything else I should be doing? What is the likelihood of a defective part?
And help would be great. Thanks!