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wmyatthu
Joined: 14 May 2005
Posts: 31
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 07 Oct 2008 19:44 Automatic LED Display |
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Hi
I want to build a LED Display that automatically change one color to another. I will use Red, Green and Blue LEDs. I want to do it in following orders: Red, Red+Green, Green, Green+Blue, Blue, Blue+Red. So the display will rotate in that order. Any one has experience in this type of LED Display. And ideas and tutorials please! Thanks.
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Azka
Joined: 13 Sep 2006
Posts: 113
Helped: 61
Location: Malaysia
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| 08 Oct 2008 2:45 Automatic LED Display |
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| I think u should use microcontroller to do that like PIC
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wmyatthu
Joined: 14 May 2005
Posts: 31
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| 08 Oct 2008 2:56 Automatic LED Display |
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| Yes. I will use PWM control of PIC16F628. Any one has such an experience, plz share me. Thanks.
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blueroomelectronics
Joined: 17 Sep 2006
Posts: 1229
Helped: 60
Location: Toronto, Canada
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| 08 Oct 2008 3:41 Automatic LED Display |
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| The 16F628A has only 1 PWM channel. But it's easy to do in software.
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alexz
Joined: 19 Nov 2004
Posts: 285
Helped: 3
Location: UK
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| 08 Oct 2008 11:02 Re: Automatic LED Display |
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Assuming you are talking about High Power LEDs.
You would need 4 channels of PWMs to drive and dim the 4 LEDs R/G/B/W.
You would also need 4 channels of high current LED drivers.
NEC Electronics has just released a new microcontroller which has everything you need on-chip. And a low cost starter kit is also available.
http://www.am.necel.com/micro/applications/lighting.html
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