gamintojo paaiskininimas visiskas Bull-Shit.

Paprasciausiai 12V LEDas turi savyje stabilizatoriu ir jo darbo itampa tikriausiai nuo kokiu 5V iki 24V. Jis jis siame diapazone svies _vienodai_. Todel itampos keitinimo diminimas netinka. PWM diminimas tikriausiai irgi netinka, nes LEDo stabilizatorius tikriausiai a) turi iejime dideli kondika, b) LEDo stabilizatorius dirba didesniu dazniu nei diminimo ir pilnai speja pasiimti tiek energijos kiek jam reikia.

Ir tokie LEDai ne "cheap LED product". Va tie kurie lengvai diminasi yra "cheap".

Bye, Levas


"knx" <varzug@gmail.com> wrote in message news:hsdhvd$a8g$1@trimpas.omnitel.net...
> Sveiki,
> niekaip nesuprantu kaip diminti LED 12V lemputes.
> Turiu toki dimmeri, kaip atachmente, kuris tinka valdymo sistemai, bet 
> nelabai suprantu kiek ir kokias led lempos (pvz http://eled.lt/Buitinis.htm) 
> jam tinka. Nu suprantoma, kad 12V. Nes kai klausiu dimmerio gamyntojo apie 
> http://www.electricity-monitor.com/mr16-3x1w-led-12v-spot-cool-white-p-141.html 
> tokio tipo lempa, tai jis sako kad:
> 
> That’s the problem about the cheap LED products.
> This device works all together with a simple 12 V power supply.
> But you are not able to dimm this spot.
> 
> The write about 700mA : because inside they use cree LEDs with a constant 
> current of 700mA. But this doesn’t mean, that the input on the contacts is 
> 12V, 700mA = 8,4W
> And it is not correct: because the cree LEDs are able to work with 700mA, in 
> this case the write 3x1W. If this LED have an output of 1W the drive them 
> with 350mA!!!
> It’s not possible to drive this LED without a big cooling device with 700mA 
> in a so small spot
> 
> You definitely can not dimm this product!!!
> 
> We also have LED Spots in our product portfolio. In the catalog you will 
> find them as TEKO.
> This spots we also produce with an 12V input. They are not dimmable.
> But we also produce them without control: so you can drive them direct with 
> the CURVE actuator.
> 
>