4x7 segment featherwing LED backpack

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rianL
 
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4x7 segment featherwing LED backpack

Post by rianL »

Hello,

I could use a little help with the yellow 7-segment display and featherwing backpack combo (3109). This is my first attempt with I2C communications on the Arduino and I think I may have a wiring issue. I can't get the display to light up using the sevenseg example. I have included a picture of what I've got so far.
7segLEDbackpack.jpg
7segLEDbackpack.jpg (118.7 KiB) Viewed 140 times

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rianL
 
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Re: 4x7 segment featherwing LED backpack

Post by rianL »

Oops. Found the problem. Loose ground connection.

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adafruit_support_carter
 
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Re: 4x7 segment featherwing LED backpack

Post by adafruit_support_carter »

Glad you got it working. Some additional info FWIW:

There are pull up resistors already on the FeatherWing, R1 and R2:
https://learn.adafruit.com/adafruit-7-s ... ematic-6-2
so you don't need to add external ones.

These also come in a general purpose breakout form factor:
https://www.adafruit.com/category/103
So you don't have to use the FeatherWing form factor if you don't want. Just depends on you end use.

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