paprastai daromas sroves per LED stabilizatorius... Pirmiausia, kad 
nesokinetu srove-sviesumas, kai sokineja itampa..., o kitas 
dalykas-ekonomija, nes stabilizavimas daromas paprastai naudojant PWM ir 
raktus...



"knx" <varzug@gmail.com> parašė naujienų 
pranešime: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.
>
>