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Author Topic: Control Knob for LED/CCL  (Read 3264 times)

Skylined

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Control Knob for LED/CCL
« Reply #10 on: September 22, 2003, 08:56:10 PM »

The pot to use depends on your led's specs and supplied voltage.

I'm about to write another guide, this time a fan controller  that is rheo (6.5V to 10.5V) / off / 12V with indicating bicolour led.
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Coeus

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Book/Web?
« Reply #11 on: September 25, 2003, 06:45:04 PM »

I have been searching for a few days to see what kind of help/instructional resources I could find.  I have not come up with anything worth a darn.

Can someone point me to a web source or book that would get me started in electronics?  I have no idea what anything means, for example pot, rheo, etc... or how to use them.

I would rather have an all encompassing site/book than try to ask a bunch of questions on here.

Thanks,
Coeus
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viridius

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Control Knob for LED/CCL
« Reply #12 on: September 25, 2003, 06:52:33 PM »

I'm working on a guide for electronics, but it will be a few days.  Basically, pots and rheos are devices that limit the flow of current by changing their resistance to that current.  Since the brightness of an LED is directly proportional to the current running it, a pot can be used to change its brightness.
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ClearCaseMan

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Control Knob for LED/CCL
« Reply #13 on: September 25, 2003, 06:55:42 PM »

Be carefull with dimming a ccfl it is designed to run at a given voltage and changing that may affect the transformer shortining its life
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I LOVE ED

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Control Knob for LED/CCL
« Reply #14 on: September 25, 2003, 06:59:32 PM »

Quote from: viridius
I'm working on a guide for electronics, but it will be a few days.  Basically, pots and rheos are devices that limit the flow of current by changing their resistance to that current.  Since the brightness of an LED is directly proportional to the current running it, a pot can be used to change its brightness.


to follow-up, just imagine a potentiometer as an adjustable resistor.  You'll see pots labeled with a certain resistance value, for example, a 100-Ohm potentiometer.  That means that particular potentiometer can set a resistance up to 100-Ohms, with a turn on the knob.
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PetaHertz

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Control Knob for LED/CCL
« Reply #15 on: September 25, 2003, 07:05:35 PM »

If you go to http://electronics.howstuffworks.com/channel.htm?ch=electronics&sub=sub-building-blocks">www.howstuffworks.com they have some info on electronic components.

http://www.physics.uoguelph.ca/tutorials/ohm/index.html">THIS site also has some basic electronics tutorials.

And finally http://www.ibiblio.org/obp/electricCircuits/">THIS site has a little more info for you.
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Coeus

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Control Knob for LED/CCL
« Reply #16 on: September 25, 2003, 07:56:59 PM »

Thanks, I will check those out when I get a chance.

I think that I am going to change from a knob that varies the light, to a knob that acts like a switch.  So, instead of a toggle switch for on/off, i was thinking of a knob for on/off.  Would I have to use the same thing or what?

Thanks,
Coeus
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viridius

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Control Knob for LED/CCL
« Reply #17 on: September 25, 2003, 08:55:45 PM »

Actually, there are switches that turn on or off when you rotate them.  Look around in some of the links that are stickied at the top of the electronics page.
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Coeus

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Control Knob for LED/CCL
« Reply #18 on: September 26, 2003, 10:16:04 AM »

Kewl thanks, I did a quick search after posting that, and found that sticky.  Geesh, if only I would just look before asking.  It seems I always have that problem, specially when talking... Most of the time I forget to think before I talk.  Some how I seem to get in trouble that way...  :-?  :dumdum:

Oh, I am actually looking at creating some kind of control device that does the following:
  • Controls several fans and lights
  • Monitors temp
  • If temp is too high, switch on more fans
  • If temp is too high and all fans and lights are on, turn lights off
  • If temp is low enough, turn fans off
  • Turn fans/lights on/off from a control panel on the case somehow
  • Turn fans/lights on/off from computer
  • Either LCD or Light display or both of some sort
  • etc...
  • [/list:u]
    I think you get the idea.  I have seen some products out there, but I want to build my own, that way it will do exactly what I want it to.

    If you know of some products that meet these requirements, feel free to let me know.
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