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Total 9 documents matching your query.

1. Low-voltage (12V) LED lights (score: 1): Author: Ian <shop-talk@mcfetridge.org>; Date: Mon, 15 Jan 2007 11:27:15 -0500; Hi All, Here's what I'm trying to do: I have a built-in wall unit that has existing 12V spotlights using a 300W transformer (see 12VTrans pic link below) that has a lot of excess capacity (only using; /html/shop-talk/2007-01/msg00198.html (8,982 bytes)
2. Re: Low-voltage (12V) LED lights (score: 1): Author: "E. John Puckett" <ejpuckett@centurytel.net>; Date: Mon, 15 Jan 2007 12:39:02 -0600; if you will look at the different power supplies you will see the difference. The LED lights require dc power (note the transformer says output 12vdc). teh exisiting transformer you have is marked ou; /html/shop-talk/2007-01/msg00200.html (10,841 bytes)
3. Re: Low-voltage (12V) LED lights (score: 1): Author: Ian <shop-talk@mcfetridge.org>; Date: Mon, 15 Jan 2007 14:01:20 -0500; Wow, it certainly helps to have a new set of eyes look at the problem. I *ordered* a 600W DC power supply and never noticed the 12VAC on theose transformers (see what I expect to see I guess). Thank; /html/shop-talk/2007-01/msg00201.html (8,895 bytes)
4. Re: Low-voltage (12V) LED lights (score: 1): Author: "Arvid Jedlicka" <arvidj@visi.com>; Date: Mon, 15 Jan 2007 13:14:20 -0600; Based on the "output" statements on the pictures you provided: The LED power supply puts out 12 volts DC, 5 watts, or about .4 amps. The spotlight transformer puts out 12 volts AC, 60 watts, or about; /html/shop-talk/2007-01/msg00202.html (11,462 bytes)
5. RE: Low-voltage (12V) LED lights (score: 1): Author: "Mullen, Tim" <Tim.Mullen@ngc.com>; Date: Mon, 15 Jan 2007 15:46:03 -0500; I am certainly not an expert on such things, but I've also been of the understanding that one way to "dim" LEDs is to pulse them - turn the electricity on an off - the more "on", the brighter they a; /html/shop-talk/2007-01/msg00203.html (7,869 bytes)
6. Re: Low-voltage (12V) LED lights (score: 1): Author: "Arvid Jedlicka" <arvidj@visi.com>; Date: Mon, 15 Jan 2007 16:04:31 -0600; You are correct, that is another way to dim them - turn them on and off very rapidly and let the eye do the "total light from the device" integration over time. In its simplest form, it is all about; /html/shop-talk/2007-01/msg00204.html (9,355 bytes)
7. RE: Low-voltage (12V) LED lights (score: 1): Author: "Randall" <tr3driver@ca.rr.com>; Date: Mon, 15 Jan 2007 16:24:43 -0800; I guess I'm missing something here ... why is everyone convinced this won't work ? LEDs are diodes, meaning they do have a relatively fixed forward voltage drop, below which no current flows; and th; /html/shop-talk/2007-01/msg00205.html (7,905 bytes)
8. Re: Low-voltage (12V) LED lights (score: 1): Author: "Arvid Jedlicka" <arvidj@visi.com>; Date: Tue, 16 Jan 2007 07:06:15 -0600; My thoughts were related to how well it would work - hence the term reliable - not that it would not light, or possibly even dim the LED strip at all.. But you are correct. Build it and see what hap; /html/shop-talk/2007-01/msg00206.html (9,469 bytes)
9. RE: Low-voltage (12V) LED lights (score: 1): Author: "Randall" <tr3driver@ca.rr.com>; Date: Tue, 16 Jan 2007 11:02:59 -0800; Well, except that this is a half-sine wave, with a peak value closer to 170 volts. And, as I mentioned before, the dimmers I have don't have enough phase shift in the trigger circuit to trigger the; /html/shop-talk/2007-01/msg00207.html (9,325 bytes)

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