1.2" 4-Digit 7-Segment Display w/I2C Backpack Issue

[slampana]

I'm having an issue getting the 4th digit on my 7 segment display working on my Raspberry Pi. Everything else works great, just no 4th digit. I've been using the Adafruit code and so far nothing I've tried gets it to work. The tutorial says to connect IO to 3.3v on the pi, but that makes it even worse...the top or bottom (I can't remember which) segments don't work when I do that.

Here's my code, the connections and some pictures. Any help would be greatly appreciated.

Connections:
D -> SDA
C -> SCL
+ -> 5v
- -> GND

Code: Select all

import time
import datetime
from Adafruit_7Segment import SevenSegment
from Adafruit_LEDBackpack import LEDBackpack

# ===========================================================================
# Clock Example
# ===========================================================================
segment = SevenSegment(address=0x70)
backpack = LEDBackpack()

backpack.setBrightness(0)

print "Press CTRL+Z to exit"
print datetime.datetime.now()

while True:

    segment.writeDigit(0, 8)
    segment.writeDigit(1, 8)
    segment.writeDigitRaw(2, 0x2)
    segment.writeDigit(3, 8)
    segment.writeDigit(4, 8)
    time.sleep(1)

WP_20130825_006.jpg (457.39 KiB) Viewed 1437 times

WP_20130825_002.jpg (387.71 KiB) Viewed 1437 times

[adafruit_support_rick]

Please post some pictures of the solder side of the board!

[slampana]

Here you go...

WP_20130825_007.jpg (481.62 KiB) Viewed 1405 times

[adafruit_support_rick]

Looks like you have a bad display. Please email [email protected] with a link to this thread and ask for a replacement.

[slampana]

Thanks for the quick help