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LEDWiz, basic LED and RGB LED questions
unclet:
headkaze
You stated "You would also need to modify a PC power cable to run directly off PC's 5V power supply as the USB connection would not be sufficient to run them all"
I have a spare 200Watt PC power supply in the closet which I can use in the jukebox, however, I am not quite sure what you are telling me I need to do. I thought the LED lights need to be connected to the LEDWiz for it to control the lights. Are you indicating one of the RGB wires should be connected to the PC power supply 5V line while the other wires should be connected to the LEDWiz screw terminals? Please explain.
Oh yeah .... if I decide to simply use a standard LED light (ie: not RGB type), then I am assuming these could be wired in parallel and connected to one port of the LEDWiz only .... is this true? I mean, would you recommend still connecting these standard LED lights to the PC power supply as well or not?
superbigjay:
--- Quote from: unclet on November 20, 2007, 09:19:40 am ---headkaze
You stated "You would also need to modify a PC power cable to run directly off PC's 5V power supply as the USB connection would not be sufficient to run them all"
--- End quote ---
Hello Unclet,
If you are using the 5V from the usb port, there will be a limitation on the amount of power. GGG's ledwiz documentation state that the ledwiz powered by the usb should be able to supple 500ma. most leds draw about 20amps, giving you a max of 25 leds.
If you use the 5V directly from the power supply (ledwiz, external 5v), then you are able to drive many more leds.
For example, your 200W power supply should be able to drive 2000 leds (each leds is using roughly P=VI=5v*20mA=100mW)
I guess you should be able to borrow a few WATTS from your existing power supply (about 10 leds per watt). So you might not need that extra 200W power supply.
A last note...
don't forget the resistor on each "control wire" going to your ledwiz.
the value should be:
(5v - led_voltage)/(led_current)
Since the current is fix, and you have a range of operating led voltage, you'll end up with a resistor range value that you should be able to match...
If you connect more than 1 led in parallel, don't forget that the current used is multiplied by the number of led...
Ex:
a led with V={3.3, 3.6} and I=20mA is fine with a resistor of 78 Ohms
I you connect 3 of those leds in parallel, they will draw 60 mA, so the resistor will be 26 Ohm (or you can connect 3 resistor of 78 Ohms in parallel)...
Anyways, Hope this helps...
Also, make sure you recalculate... I wrote all those number from memory :dizzy:
Cheers :cheers:
Jay
RandyT:
--- Quote from: headkaze on November 19, 2007, 04:17:28 pm ---The only problem is the LuminAudio software is still a bit limited at the moment, but I think if it was expaned to play back random lwa's, have the plasma effect (which I could possibly help out with), and the "dance to music" all randomly changing (to music!) you would have a pretty awesome addition to a jukebox ;)
--- End quote ---
Just a note on the LuminAudio software. I started working on the automation features a couple of weeks ago (hard to believe it's been that long already :banghead:) and made excellent progress in the couple of hours I was able spend on it. Basically, all controls of the software can be manipulated via specific window captions, generated by external apps, through a very simple protocol. This also includes hiding, showing and exiting the control panel.
At the moment, all that is left to do is the LWA filename and input device selection. And while not necessary for front-end integration, automatic storage and retrieval of the last state of the software.
I'll look at what adding the "random" function will take. Probably be pretty easy to add, I would think.
RandyT
unclet:
I am confused as to how the 5V from the power supply is used to connect the LEDWiz and or LED lights.
I am confused as to how I should incorporate the 5V power from the power supply. I believe the LEDWiz comes with a USB cable to hook it up. Are you saying that I should "not" use that USB cable but instead connect the LEDWiz up to the power supply 5V directly somehow? If so, how?
Also, Randy's LED lights come with a resistor (I am told) but will this resistor be able to be used if I connect more than one LED in parallel to each other or must I buy different resistors if I do this?
I am electrically challenged so I am getting confused with all the electrical stuff ..... sorry if these questions seem stupid to some people (or most people :P)
RandyT:
--- Quote from: unclet on November 20, 2007, 01:52:31 pm ---I am confused as to how the 5V from the power supply is used to connect the LEDWiz and or LED lights.
I am confused as to how I should incorporate the 5V power from the power supply. I believe the LEDWiz comes with a USB cable to hook it up. Are you saying that I should "not" use that USB cable but instead connect the LEDWiz up to the power supply 5V directly somehow? If so, how?
--- End quote ---
No. You still hook up the LED-Wiz with the USB cable. But you will remove the jumper that configures the device by default for the USB power and get the power directly from the PC power supply for the LED's. See the diagram in the documentation (available at the store) for more info.
--- Quote ---Also, Randy's LED lights come with a resistor (I am told) but will this resistor be able to be used if I connect more than one LED in parallel to each other or must I buy different resistors if I do this?
--- End quote ---
Each LED, even in parallel, gets it's own resistor. Multiples can be wired differently to use a lower component count, but the EE types swear that one resistor per LED in parallel is the best solution.
RandyT
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