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.
4x7 segment featherwing LED backpack
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Please be positive and constructive with your questions and comments.
- rianL
- Posts: 4
- Joined: Mon Oct 08, 2018 9:10 pm
Re: 4x7 segment featherwing LED backpack
Oops. Found the problem. Loose ground connection.
- adafruit_support_carter
- Posts: 29056
- Joined: Tue Nov 29, 2016 2:45 pm
Re: 4x7 segment featherwing LED backpack
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.
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.
Please be positive and constructive with your questions and comments.