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1  Forum 2005-2010 (read only) / Interfacing / Re: Arduino to PX24500 DMX Receiver on: December 08, 2010, 06:34:03 am
Update: I got it work. In true amateurish fashion I only had to switch over two wires. I can now control the RGB strips fully, using the DMX simple library.

The PX24500 has a good response time allowing smooth fading and instant colour changes.

And only cost £56.40 so reallllllly good value!
2  Forum 2005-2010 (read only) / Interfacing / Re: Arduino to PX24500 DMX Receiver on: December 08, 2010, 04:20:33 am
Bump?
3  Forum 2005-2010 (read only) / Interfacing / Arduino to PX24500 DMX Receiver on: December 07, 2010, 10:59:51 am
I'm trying to control some LED Strips using the PX24500

I'm working via these 3 examples. 1 , 2 , 3

I have wired up the power supply & LED Strips to the PX24500 and the lights work, they appear white.

For the Arduino control side I am using the SN75176 Chip as opposed to the MAX485. and have matched the circuit diagram provided in all the walk throughs.

However I have tried uploading some simple code to turn channel 1 to max brightness with 2 and 3 turned off. But it doesn't work. I've been through a number of things which I thought might be wrong.

1. Using a Patch Cable & a Crossover Cable
2. Rebuilding the circuit between the Arduino and the PX24500
3. Trying the DMXSimple examples provided by tinker.it as well as my own code (as is shown below)

I was wondering if anyone can spot where I might be going wrong?

It's worth noting I'm not sure what the dip switches on the side should be set to so they are currently all turned off.

Code:
#include <DmxSimple.h>

void setup() {
  DmxSimple.maxChannel(3);
}

void loop() {
  DmxSimple.write (1, 255);
  DmxSimple.write (2, 0);
  DmxSimple.write (3, 0);
  delay(2500);
}


Thanks
GPR
4  Forum 2005-2010 (read only) / Exhibition / Re: Christmas Twee on: December 22, 2010, 07:08:01 am
Thanks smiley-grin It was a lot of fun!
5  Forum 2005-2010 (read only) / Exhibition / Re: Christmas Twee on: December 22, 2010, 04:12:53 am
it has heliotrope! you just need to do it with lower case! To have both upper and lower case it would double the size of the array so I just went with lower case since most people dont care much for grammar on twitter... 140 characters n all smiley
6  Forum 2005-2010 (read only) / Exhibition / Christmas Twee on: December 21, 2010, 06:13:15 am




http://www.christmastwee.co.uk

So I've made a festive little project using arduino and processing. It's called Christmas Twee and it basically allows you to tweet our christmas tree a colour and it will do its best to interpret it as an RGB colour!

Essentially what happens is I download the latest 20 @mention tweets of the @xmastwee account and iterates through searching each one for a colour in an array. When it finds one sends 3 rgb values from the same array entry down serial port where arduino picks them up and passes them onto a dmx decoder controlling 2 rolls of 10m RGB LED strips smiley

Pictures and more in depth info to follow, but take a look and let me know what you think smiley-grin

Merry Christmas!
GPR
7  Forum 2005-2010 (read only) / Exhibition / Re: Large 8x8 RGB LED lit grid on: December 07, 2010, 10:59:24 am
Super Cool
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