Search found 191 matches

by Brissieboy
Mon May 06, 2019 12:07 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 3791

Re: Data Polarity

Difficult to give an accurate answer without knowing more about your sketch. I will assume you are using the DMD library as you mention 'DMD Lib' and not DMD2. If that is the case, have a look at the format of drawMarquee(): drawMarquee(const char *bChars, byte length, int left, int top, byte fgcolo...
by Brissieboy
Mon Apr 29, 2019 11:22 pm
Forum: Dot Matrix Display
Topic: Driving 48 panels
Replies: 6
Views: 2042

Re: Driving 48 panels

I suspect you will have a trouble achieving your goal with unos. You are correct with the basic limit of 6 DMDs on a single uno, so you would have to set up a master/slave configuration. However I doubt a single uno as master could handle enough slaves. And you would not be able to achieve any accep...
by Brissieboy
Sat Apr 13, 2019 11:41 pm
Forum: Eleven
Topic: Hi I'm new here
Replies: 3
Views: 7025

Re: Hi I'm new here

When you are within a thread you only have the option to post a reply to that thread. You need to go one level higher in the forum menu to post a new topic under that topic.
newtopic.JPG
by Brissieboy
Wed Apr 10, 2019 11:57 pm
Forum: Module Discussion
Topic: Why two mosfets in circuit for "N-MOSFET driver"
Replies: 3
Views: 3717

Re: Why two mosfets in circuit for "N-MOSFET driver"

Just a suggestion, but maybe because the WS2811 is a current driver device it cannot be guaranteed to reach appropriate logic levels to fully drive the NTD5867.
You could try an email to support@freetronics.com.au and see if they have design details.
by Brissieboy
Sun Mar 24, 2019 11:04 pm
Forum: Dot Matrix Display
Topic: External data not reading
Replies: 5
Views: 2438

Re: External data not reading

In

Code: Select all

dmd.drawString(  0,  0, (t), 3, GRAPHICS_NORMAL );
Looks like (t) is only pointing to a character and you're trying to print a string?
by Brissieboy
Fri Feb 22, 2019 11:05 pm
Forum: Dot Matrix Display
Topic: Missing characters from serial input when using DMD2
Replies: 5
Views: 2458

Re: Missing characters from serial input when using DMD2

Sorry but I can't offer much help here as I have not done much with DMD2. You could try limiting your serial while loop to doing nothing but gathering the input characters and putting them into a buffer and see if that has any effect.
by Brissieboy
Wed Feb 20, 2019 5:09 am
Forum: Dot Matrix Display
Topic: Missing characters from serial input when using DMD2
Replies: 5
Views: 2458

Re: Missing characters from serial input when using DMD2

I suspect your sketch is spending too much time in the interrupt updating the DMDs. It will take quite a while to do this with 10 DMDs. Characters will probably be lost during this time.
by Brissieboy
Mon Feb 18, 2019 6:43 am
Forum: EtherTen
Topic: MQTT really slow to subscribe
Replies: 3
Views: 5519

Re: MQTT really slow to subscribe

setLatchChannelOn() is a procedure defined at line 202 in the code provided in the earlier message so it should be available to you as long as you have the case correct case. NOTE the capital 'C' - you show setLatchchannelOn with a lowercase 'c' in your message and that will not work.
by Brissieboy
Mon Jan 28, 2019 10:41 pm
Forum: Dot Matrix Display
Topic: Split screen marquee/scroll
Replies: 13
Views: 16408

Re: Split screen marquee/scroll

I think you can achieve what you are after by using the DMD2 library - have a play with that one. I have not done a lot with that so can't really help with that.
There is no mod to the DMD library that will do it for you as far as I am aware, but it would certainly be possible to do it.
by Brissieboy
Fri Jan 25, 2019 10:57 pm
Forum: Dot Matrix Display
Topic: Split screen marquee/scroll
Replies: 13
Views: 16408

Re: Split screen marquee/scroll

Did you try your setup with the standard unmodified DMD library using some of the supplied examples? If that works, then there is a problem with the changes. If it still does not work there is probably a problem with your sketch or your hardware setup. Are you using a Uno? If you are still having pr...