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DIY RGB AmbiLight - Page 3

post #21 of 234
Mine. Simple Arduino board through USB running 100 LEDs in 32:18. Just duct taped them to the back for now.

post #22 of 234
Thread Starter 
Quote:
Originally Posted by Caples View Post

Mine. Simple Arduino board through USB running 100 LEDs in 32:18. Just duct taped them to the back for now.

Looks nice smile.gif

I guess you run many averages to get a softer effect?
post #23 of 234
It's actually a lot more harsh. It's just the camera which makes it look that way. I've been thinking about applying a max brightness, though. It can be a bit much on occasion.
post #24 of 234
Thread Starter 
I've done a few experiments using my good old breadboard and a small MCU. I don't have any LEDs connected but I've ordered some. I could manually solder some LEDs together, but I don't really have the patience knowing they've already been ordered.

This is what my experimental setup looks like:



It's doing all the capturing and averaging in the external hardware, so it will have no effect on performance. Plus it should work directly with DVD, Bluray, XBOX, PS3 etc. without need for a PC.

It should do 30-50 fps without any problems plus as many averages as it's got enough ram for. For testing, since I don't have any LEDs, I'm sending the image back to PC so I can view what is being captured. This does slow it down a bit, but once I have LEDs there will be no need to do that.

Here a quick video of the captures and averaged image (the small capture window):



Now I just need to wait for the LEDs to arrive.
post #25 of 234
How are feeding the signal over? A digital signal or analog? Oh and if you get this to work out you'll have to post up a schematic.
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post #26 of 234
Thread Starter 
Quote:
Originally Posted by Kylepdalton View Post

How are feeding the signal over? A digital signal or analog? Oh and if you get this to work out you'll have to post up a schematic.

The signal is converted from digital to analog and then back to digital as part of the capture/averaging process, it's much faster doing the averaging that way, using just a small MCU (clocked at 80MHz) for the processing work and LED control. I'll post more details on the inner workings once I get LEDs and a bit further with the project.

It seems to work just fine in any resolution up to, and including, 1080p (I don't own any displays above that resolution, so that's as far as I've been able to test it). It should also work with a standard VGA signal with just a few tweaks. Really high resolutions could probably be done with something more powerful, maybe an ARM Cortex BeagleBoard.
post #27 of 234
Thread Starter 
While waiting for LEDs to arrive for further experiments, I've been thinking a bit about what features would be useful for this thing, this is what I've got so far:

  1. Easy setup with number of LEDs and how they are arranged around the screen.
  2. Adjustment of color tones (red, green and blue LEDs usually don't have the same intensity for the same current)
  3. Support for multiple types of LED strips (e.g. ws2801 and ws2811)
  4. Simple On/Off.
  5. Brightness adjustment.
  6. Adjustment of sample frequency and number of averages.
  7. Switch between fixed and live light mode (fixed being just an ambient light of one color and live is based on video capture)
  8. For home theater some remote control support would be useful, on/off, brightness, fixed/live mode switching.
  9. Maybe support for some extension to control more lights for full room ambient effects, e.g. LED strips around the ceiling.

Feel free to add if you got some ideas smile.gif
post #28 of 234
You Sir have already won an internet. You are striving to achieve greatness. Keep it up.

I'd probably drop #9. The entire room glowing would be obnoxious.
post #29 of 234
Please don't shoot me but.... why not just attach another monitor to the back of your current one and run screens in clone? Granted - would be stupid expensive for a TV based project but surely it would achieve the same thing?

Disclaimer - I haven't actually turned my monitor against the wall in a dark room so... may be completely off rolleyes.gif

It would possibly be backwards as well... hmm
Edited by Chickenman - 1/15/13 at 3:43pm
post #30 of 234
Thread Starter 
Quote:
Originally Posted by TLHarrell View Post

You Sir have already won an internet. You are striving to achieve greatness. Keep it up.

I'd probably drop #9. The entire room glowing would be obnoxious.

Thanks man smile.gif .. just having fun with this thing, but I do have a tendency to go a bit overboard with projects.

for #9, it's something to experiment with, it should probably be the same color, maybe a total average, but as you say, it could be too much biggrin.gif
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