Search found 159 matches

by Brissieboy
Fri May 17, 2019 10:06 am
Forum: SuperHouseTV Home Automation
Topic: Small switched mode voltage regulator
Replies: 1
Views: 35

Re: Small switched mode voltage regulator

Had a look at ebay? Something like this or this?
Not encapsulated but pretty small. AliExpress might be worth a look as well to see what is available there.
by Brissieboy
Wed May 08, 2019 10:34 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

Re: Data Polarity

It is all pointing to your display not being compatable with the DMD library. You could try inverting the data line - the others appear to function normally. That could be done in the library in software or just a simple inverter in the physical interface hardware. And you will need the line you del...
by Brissieboy
Wed May 08, 2019 6:08 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

Re: Data Polarity

It works fine for me except for these: Line 25: dmd.clearScreen( false ); clears the screen to all LEDs ON. I think you mean to have all leds OFF, so it should be: dmd.clearScreen( true ); Line 30: dmd.drawString( 0, 0, newString ,sLength, GRAPHICS_INVERSE); displays the '123' as black on white. Sin...
by Brissieboy
Tue May 07, 2019 10:36 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

Re: Data Polarity

I Just had some free time so I ran a copy of your sketch supplied in the earlier post. It displays correctly for me, however you need to change line 62 from Serial.println(readString); to Serial.println(myString); to echo your received characters back to the serial monitor, and you are not yet displ...
by Brissieboy
Tue May 07, 2019 7:51 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

Re: Data Polarity

Did you try the example dmd_demo? Did that work correctly for you?
by Brissieboy
Mon May 06, 2019 10:30 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

Re: Data Polarity

Did you try the dmd_demo? Did that work correctly for you?
For some reason your setup does not appear to be working as expected. There are 2 options for the graphics mode: GRAPHICS_INVERSE and GRAPHICS_NORMAL - have you tried GRAPHICS_INVERSE?
by Brissieboy
Mon May 06, 2019 10:09 am
Forum: Dot Matrix Display
Topic: Accepting input from Serial monitor to display it on DMD display
Replies: 3
Views: 110

Re: Accepting input from Serial monitor to display it on DMD display

Convert the variables to a string then append them to your original string.
by Brissieboy
Mon May 06, 2019 5:27 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

Re: Data Polarity

Once again, if you do not post your sketch, I can only guess at what you are doing. From the download via the link you provided, it appears to be the DMD library. In that download there are several examples which will help you understand how these DMDs work. Try 'dmd_demo' and see how that goes. If ...
by Brissieboy
Mon May 06, 2019 12:07 am
Forum: Dot Matrix Display
Topic: Data Polarity
Replies: 16
Views: 276

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: 216

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...