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Topic: Ambilight with Arduino Mega (Read 5915 times) previous topic - next topic

frollard

That pcb/kit might be perfect for it.  The shiftbars would work well too.

The ledpainter uses a 15 dollar board, and 3 5 dollar texas instrument IC's...among a pile of other components, and might not support much current on each channel (no led bars probably)

The shiftbar is about 9 bucks a piece in small quantities, you would need 1 per led bar 'channel', somewhere between 2 and 8.

For a realistic amblight you only really need 2 channels for the effect (left and right), and more just amplifies the effect.  '4' bars would be perfect, 2 sides and 2 on top, which would mean you just use the built in arduino mega pwm.

You hook up a 12 volt source to transistors (mosfets if you start drawing more power), and use 5v from the pwm lines of the arduino to switch the transistors (or mosfets) on and off.

truvu17

Thanks for the reply Frollard,

Actually on the LED Painter's website, they show that the pcb works fine with LED bars/strips: http://www.brilldea.com/product_LEDPainter.html

You sound like you have experience regarding Ambilight, do you think having more than 4 is overkill? For some reason, I feel having at least 8 (2 on each sides) would be the perfect number.

Al

DrLabel

maybe this is a good solution
http://code.google.com/p/ledstrip/

take a look

truvu17

Thanks DrLabel. That was actually the first project I saw and wanted to replicate, but there isnt sufficient amount of information for me to further replicate.

truvu17

It also looks like that led strip has more than 4 wires, meaning to control individual LED like that, I presume you are required to have like the 6 wires per the example.

DrLabel

se this links the leds are addressable they use HL1606 :
more links
http://hackaday.com/2009/06/17/addressable-rgb-led-strip/
http://www.synopticlabs.com/blog/?p=97

truvu17

Not sure if you noticed it, but all links are referring to the same project. =)

truvu17

BUMP!

Im kind of stump and could use some help from some generous and helpful individual(s).

THanks!!

RusoFob

#23
Apr 04, 2010, 03:27 pm Last Edit: Apr 04, 2010, 03:27 pm by RusoFob Reason: 1

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