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Post by douglas on May 14, 2008 6:44:43 GMT -6
Hope this stuff isn't getting boring, heres a few more 12v fixtures I made. This one is above the kitchen sink and has over 200 white Leds.  This one is above the front doorway and contains 216 warm white flux Leds. I took out the fluorescent ballast and used a few bread boards.  I made three of these for under the kitchen cabinets, they contain 56 flux Leds each.  |
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Post by notherdigger on May 14, 2008 14:27:48 GMT -6
I don't understand much about these leds but it is interesting stuff. I haven't had much luck looking up good info on the net that explains it so my simple mind can grasp it. Can you suggest a site/sites that are good?
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Post by douglas on May 14, 2008 15:50:53 GMT -6
Leds need a resistor according to the amount of voltage you are using. These are in series of four with resistors to keep them from blowing, the resistor takes the extra voltage they don't need. Most Leds handle up to 3v apiece. The longer leg on the Led is the + while the shorter leg is the _.   |
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Post by notherdigger on May 14, 2008 19:36:15 GMT -6
Thanks Douglas, I've got alot to learn but I can see how you would line them up in series. Electricity is right up there with math on my most difficult subjects. I'm going to look further into this subject and see what I can learn about them.
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Post by douglas on May 15, 2008 2:32:47 GMT -6
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Post by Pharmer Phil on May 15, 2008 5:49:47 GMT -6
Doug, I gotta hand it to ya Bro, you are saving electricity, and doing your part to be "Part of the answer" to our energy situation. Quick question(s) Douglas... I have a lamp on the night stand that has two rows of ten, making 20 LEDS in all and is battery operated with two D batteries. Now, I can see and find things with it in a dark room very well, but reading with it is very hard, even if I have my spectacles on.  it has that bluish cast to the light. so, with your fixtures, and as in the second pic "front doorway and contains 216 warm white flux Leds" how bright is this, I mean how well do you see with 216 LEDS?? and is there a difference in the "flux" LEDS?? ALSO, on my lamp, there is a plug in for an AC adapter, the plug in reads: DC 4.5 V. 1.5 A. the lamp did not come with an adapter, and, although I have found adapters close to this voltage, all are either a bit higher, or lower in both volts and amps...being as they are LED, just how much +/- could I use?? |
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Post by douglas on May 15, 2008 6:08:41 GMT -6
Flux Leds are wide angled Leds and throw light in all directions 90-120 degrees, but normal Leds only are 15-20 and light up whats in front of them. The more Leds you have the more light power you have. The 216 Led fixture puts out about like a 25w bulb but uses about 12w to run. It would be better to have the right volts on the safe side, does your lamp have this next to the power jack input? Some adapters are reversed and will not work.   |
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Post by notherdigger on May 15, 2008 10:26:37 GMT -6
These are the kind of questions I have as well, bout the brightness mainly. Thanks for asking Phil and thanks for all the info to see Douglas. So much to learn but time well invested.
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Post by douglas on May 15, 2008 10:38:45 GMT -6
Without a resistor your Led will burn out instantly, I killed many not knowing what I was doing but learned the hard way. Hooking the power supply back wards will not harm the Led seeing it is a diode which only allows DC power through one way. All diodes are is a circuit that turns AC into DC current.
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Post by notherdigger on May 15, 2008 13:05:31 GMT -6
Are you saying the led is is the converter/inverter or the resistor/pardon my incessent redundant questions but my mind has to take small bites over and over to digest this process lol. Another way to put the question is this: I have a malibu type box which I run a 12 volt bulb with from 120. Is this the same or a different horse. Sorry Douglas.
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Post by notherdigger on May 15, 2008 13:39:41 GMT -6
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Post by douglas on May 15, 2008 14:25:55 GMT -6
Those Malbu lights are most likely running off AC since filament bulbs run on both AC and DC. It has a small power pack in the box bringing the voltage down to 12v AC but can be converted to DC current. Leds run only on DC current and you need a diode which is inexpensive and a capacitor. Diode change AC to DC current, I find many in old TV's and stereos and get them there for free. The Capicitor should be at least 470 uf or more and rated 16v or more like below.   www.reprap.org/pub/Main/ElectrolyticCapacitor/electrolytic-capacitor-small.jpgelectrolytic-capacitor-small.jpg (JPEG Image, 404x419 pixels) img.alibaba.com/photo/11062645/Sidac_Bi_directional_Trigger_Diodes.jpgSidac_Bi_directional_Trigger_Diodes.jpg (JPEG Image, 360x360 pixels) |
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Post by Pharmer Phil on May 16, 2008 3:46:06 GMT -6
Flux Leds are wide angled Leds and throw light in all directions 90-120 degrees, but normal Leds only are 15-20 and light up whats in front of them. The more Leds you have the more light power you have. The 216 Led fixture puts out about like a 25w bulb but uses about 12w to run. It would be better to have the right volts on the safe side, does your lamp have this next to the power jack input? Some adapters are reversed and will not work.  yepp, I was jus wondering ifin there was any variable "wiggle room" on the voltage..thanx Douglas |
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Post by douglas on May 16, 2008 4:10:48 GMT -6
Cool bro, hope it werks out for ya  |
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