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LED Sources / Suggestions
gl.tter:
--- Quote from: Buddabing on July 05, 2005, 02:25:00 pm ---I do not support pulse width modulation, so only 4913 (17*17*17) colors are theoretically possible on my controller with the RGB LEDs. I don't know how many it'll actually be in practice, I'll have to do some experimenting.
--- End quote ---
Actually your controller chip is most likely using PWM (pulse width modulation) behind-the-scenes.
Franco:
Just had a thought.
Buddabing, your largest LED will have 40 outputs, correct?
I imagine we will not be able to control 40 RGB LEDs independantly as I would imagine each of the three colour legs would need to be conected to an output?
If this is the case will we only be able to run thirteen independant RGBs of the board?
I wanted to run around 16 RGBs independantly and 16 normal LEDs independantly as well. Please say this will be possible!
If we cannot control them all of one board will it be possible to link two?
Buddabing:
--- Quote from: Franco on July 06, 2005, 02:24:45 am ---Just had a thought.
Buddabing, your largest LED will have 40 outputs, correct?
I imagine we will not be able to control 40 RGB LEDs independantly as I would imagine each of the three colour legs would need to be conected to an output?
If this is the case will we only be able to run thirteen independant RGBs of the board?
I wanted to run around 16 RGBs independantly and 16 normal LEDs independantly as well. Please say this will be possible!
If we cannot control them all of one board will it be possible to link two?
--- End quote ---
The board will be able to control 40 outputs. Since the RGB LEDs each take three outputs, the board will only control 13 RGB LEDs.
It will be possible to link two boards. However, this will require a slight reversible mod to the second board. One leg of two of the ICs on the second board will have to be lifted and a jumper wire soldered from the lifted leg to one of the other legs. To split the parallel port signal, you can use a parallel port splitter cable like I am using for debugging, or you can run two jumper wires from the first board to the second.
Are you serious about getting two boards? It will require some software changes on my part.
Franco:
Yeah in that case im going to need at least 64 outputs if possible, so ill probably be looking at two 40 boards This is depending on price of course, and ideas about how much we are going to be talking? I know you probably havent figured costs out but a ball park figure would be nice before I get all excited and buy a load of LEDs etc.
Will the software changes be a big hassle for you?
Buddabing:
--- Quote from: Franco on July 06, 2005, 11:19:50 am ---Yeah in that case im going to need at least 64 outputs if possible, so ill probably be looking at two 40 boards This is depending on price of course, and ideas about how much we are going to be talking? I know you probably havent figured costs out but a ball park figure would be nice before I get all excited and buy a load of LEDs etc.
Will the software changes be a big hassle for you?
--- End quote ---
The software changes are already done.
The software changes mostly involved changing the number 40 to the number 80.
I did have to create a config option to enable the second controller.
So it was no big deal.
I'm sorry, I cannot give you specific details about pricing at this time. I have committed in another thread to providing a fully loaded 40 LED controller with wired-up white LEDs, power cable, and parallel port cable for less than $100. I will honor that commitment. If you want to buy your own LEDs and wire them, then the cost will be less.
Don't worry, you will know the pricing before you order. :)
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