1.2" 7 segment Backpack brightness with Arduino

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wjburl
 
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Joined: Wed Apr 18, 2018 6:09 pm

1.2" 7 segment Backpack brightness with Arduino

Post by wjburl »

I just setup my new 1.2" 7 segment Backpack. I am using the sevenseg program example from the Adafruit Adafruit_LED_Backpack-master library with the 1.2" 7 segment Backpack connected to an Arduino UNO. It displays very dim numbers. I then added the lines:

matrix.setBrightness(15);
matrix.writeDisplay();

It didn't make any difference. When the dashes displayed by part of the program when the number is too long, those dashes are bright. Later in the program, a very bright colon is displayed.
How the display is wired
How the display is wired
IMG_20180425_140652_smaller.jpg (546.58 KiB) Viewed 141 times

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wjburl
 
Posts: 6
Joined: Wed Apr 18, 2018 6:09 pm

Re: 1.2" 7 segment Backpack brightness with Arduino

Post by wjburl »

Just a noob problem. When I read that for large displays to use the v_IO pin, I thought that meant instead of the +5v pin. I went on to a different project for a few days and when I returned to this one, I connected both pins to +5v and it is working as expected. I now am using the display with an Adafruit HUZZAH ESP8266 board to display NTP time.

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