rgb led for led matrix

[ultra]

is this the proper led to use for the led matrix?

http://cgi.ebay.com/50X-New-5mm-4-Pin-RGB-Common-Cathode-LED-8-000mcd-F-R_W0QQitemZ250077113620QQihZ015QQcategoryZ66954QQrdZ1QQcmdZViewItem

[Wilba]

You mean the button and LED matrix for MB-SEQ V3?

http://www.ucapps.de/mbhp/button_duoled_matrix.pdf

These RGB Leds are "common cathode". That means the red, green and blue LEDs are joined together at their cathodes, the pointy end of the arrow symbol.

The Button/Duo LED matrix uses two-colour (Red/Green) LEDs, also common cathode.

So you could use RGB LEDs and choose to use the Red/Green, the Red/Blue or the Blue/Green LEDs.

Or you could add another shift register to control all three colours, and change the code to support the extra shift register. That's my plan, by the way  ;D

[ultra]

let me know how it goes.  i swear from the youtube video i saw a color for an active step, a color for an inactive step, and another for a step being triggered.  but there may have been no color for the inactive step.  is there code involved with what you're doing?

[Wilba]

When the red and green are both on, the light is yellow or orange. That's the third colour in the demo.

I've only got the idea at the moment, that when I build my MB-SEQ, I'll use RGB LEDs and write a little bit of code to handle the extra LED colour. For now, there's no problem for you to buy RGB LEDs and only use two of the LED colours, if you choose red and green it will work exactly like the demo, then at a later stage add the third LED colour if someone writes the code for it  ;)

[ultra]

so does using the led matrix at all require code?  i'm not apt at this, unfortunately.  i saw the youtube video and figured there was software ready to go for that implementation.

[Wilba]

I think it is already in MB-SEQ V3, but it's not officially released yet.

[ultra]

excellent, thanks.