Search found 7 matches

by hersh
Mon Jul 09, 2018 11:52 pm
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Re: Connecting two Displays

Thanks for all the help. I've finished my Table Tennis scoreboard using a single display. It uses IR to adjust brightness and scores. Serve and deuce tracking are automatically handled as is the best of three game behavior. Fun project and great display. I can post the code if anyone is interested.
by hersh
Thu Jul 05, 2018 11:48 pm
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Re: Connecting two Displays

Thanks for the link. Will try it over the weekend. The IR remote is for updating the scoreboard I'm building but as reported on this Forum there seems to be an issue when using DMD2. Your suggested solution looks much easier.
by hersh
Thu Jul 05, 2018 12:04 pm
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Re: Connecting two Displays

Can I run it off 3V instead of 5?
by hersh
Thu Jul 05, 2018 12:01 pm
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Re: Connecting two Displays

Thanks for the explanation and tip. Now I need sunglasses to read the display. Is there a way of dimming the panel? I know DMD2 has one but I've discovered that using an IR sensor and DMD2 results in inconsistent IR readings - so I need to use the original library. But how to dim the display?
by hersh
Thu Jul 05, 2018 7:08 am
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Re: Connecting two Displays

You were right. Powering the second display did the trick. My sample code uses 430 mA for each display so it makes sense that the second display didn't come up. I'm surprised the first one did. Once again, thanks for your help.
by hersh
Thu Jul 05, 2018 4:51 am
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Re: Connecting two Displays

Thanks for the prompt reply. Yes using the equivalent of a one-to-one ribbon cable. Both displays are working. I have a third which isn't. I run the brightness at a minimum so not consuming too much power. One DMD is fine being powered from the Arduino. Can even turn on all LEDs at low brightness. I...
by hersh
Thu Jul 05, 2018 12:03 am
Forum: Dot Matrix Display
Topic: Connecting two Displays
Replies: 10
Views: 238

Connecting two Displays

I have two 32x16 DMD panels and have them connected pin for pin. The example Marque Arduino Sketch has been changed to 2 screens wide but the scrolling shows nothing on the second display. Any help will be appreciated.