Search found 165 matches

by Brissieboy
Mon Aug 19, 2019 9:33 pm
Forum: Dot Matrix Display
Topic: Need help with proteus dmd component creation
Replies: 3
Views: 102

Re: Need help with proteus dmd component creation

This is how the DMDs are daisy-chained. That is not the way you are showing in your clip.
by Brissieboy
Mon Aug 19, 2019 2:57 am
Forum: Dot Matrix Display
Topic: Need help with proteus dmd component creation
Replies: 3
Views: 102

Re: Need help with proteus dmd component creation

As shown in the clip, the displays do not appear to be the standard DMDs - connections and interconnections are different. If they are, then you need to connect them correctly.
And have a look at this. It might help
by Brissieboy
Mon Aug 12, 2019 11:53 pm
Forum: OLED128 Display
Topic: OLED128 and EtherMega
Replies: 2
Views: 209

Re: OLED128 and EtherMega

There are quite a few posts on this forum warning about just that problem.
You should not rely on USB power to run anything other than the basic Arduino.
Always power your 'extras' from a reliable source.
by Brissieboy
Wed Jul 31, 2019 5:59 am
Forum: Module Discussion
Topic: where do i find files
Replies: 1
Views: 242

Re: where do i find files

That is an Eagle library file. Not sure whether or not it is generally available to the public or a proprietary Freetronics file.
You could try an email to support@freetronics.com.au and see if they can help.
by Brissieboy
Tue Jul 16, 2019 9:26 am
Forum: Dot Matrix Display
Topic: LEDs and Resistors and Power and USB Ports and Stuff.
Replies: 2
Views: 296

Re: LEDs and Resistors and Power and USB Ports and Stuff.

Most USB ports do have current limiting so loading them up too much will usually not cause failure in the PC, but will result in the available voltage dropping considerably; leaving very uncertain results from whatever you have plugged in. The reasons for powering the DMDs separately is partially re...
by Brissieboy
Mon Jul 15, 2019 12:58 am
Forum: Dot Matrix Display
Topic: Split screen marquee/scroll
Replies: 12
Views: 12601

Re: Split screen marquee/scroll

The DMD library version I started with is here . To avoid confusion with libraries, make sure each library is contained in its own directory under the 'libraries' directory. And also power your DMD from a decent separate power source - do not power it via the USB connection to the Arduino. Very ambi...
by Brissieboy
Fri May 17, 2019 10:06 am
Forum: SuperHouseTV Home Automation
Topic: Small switched mode voltage regulator
Replies: 2
Views: 976

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: 1386

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: 1386

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: 1386

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...