Tai gaunasi, jei paimti LED lempute be driverio, tai ji galima valdyti su PWMu? Nes shitas dimeris butent PWM'u ir valdo. O kaip veikia tokie dimeriai? http://www.luchrom.com/product/cate_8626_1.html Nu pvz: http://www.luchrom.com/product/69087_pic.html Ji reikia diminti su AC dimeriu? Tai paimu kaitinimo lempai skirta dimeri > sita led dimmeri > led lempute is to pacio luchrom ar kaip? "Bilibobas" <kakbubu@tralia.lt> wrote in message news:hsdnt3$jqe$1@trimpas.omnitel.net... > gamintojo paaiskininimas visiskas Bull-Shit. > > Paprasciausiai 12V LEDas turi savyje stabilizatoriu ir jo darbo itampa > tikriausiai nuo kokiu 5V iki 24V. Jis jis siame diapazone svies > _vienodai_. Todel itampos keitinimo diminimas netinka. PWM diminimas > tikriausiai irgi netinka, nes LEDo stabilizatorius tikriausiai a) turi > iejime dideli kondika, b) LEDo stabilizatorius dirba didesniu dazniu nei > diminimo ir pilnai speja pasiimti tiek energijos kiek jam reikia. > > Ir tokie LEDai ne "cheap LED product". Va tie kurie lengvai diminasi yra > "cheap". > > Bye, Levas > > > "knx" <varzug@gmail.com> wrote in message > news:hsdhvd$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. >> >>