Connect CLK to the I2C clock - on Arduino UNO thats Analog #5, on the Leonardo its Digital #3, on the Mega its digital #21
Connect DAT to the I2C data - on Arduino UNO thats Analog #4, on the Leonardo its Digital #2, on the Mega its digital #20
Connect GND to common ground
Connect VCC+ to power - 5V is best but 3V also seems to work for 3V microcontrollers.
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:
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 peimar led 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!
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