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| LED voltage ? http://www.rcsail.com/forum/viewtopic.php?f=3&t=399 |
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| Author: | K.Y.Mak [ Mon Jan 31, 2005 9:15 pm ] |
| Post subject: | LED voltage ? |
Hello all, After the last F3F race which some of us have to walk down the mountain in the dark. I'm going to make a torch using super bright LEDs, which was supposed for my EPP night flying. The LED torch will make use of receiver batteries for power, so that I don't have to carry extra batteries. So, I need to know what is the working voltage for each LEDs, which should work with 4x1.2v battery packs. |
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| Author: | Ah Pong [ Mon Jan 31, 2005 10:17 pm ] |
| Post subject: | |
Dear Mak, As far as I know, most of those ultalight LEDs are work at 6V. I immediately try them at 4.8V at home. Guess what, it works well, althought it is not as bright as working with 6V, but is good enough for you purpose. Regards. |
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| Author: | CM Cheng [ Mon Jan 31, 2005 11:53 pm ] |
| Post subject: | |
I think you should not connect it directly to a NiCd / NiMH that can supply a high current. As I know 6V should be out of the working voltage of all the LEDs (except the Luxeon 5W). The LED will get hot and eventually damaged. |
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| Author: | 小克 [ Tue Feb 01, 2005 5:05 am ] |
| Post subject: | |
 those leds are 2v to 3v,@$2 except the red one is 1.5v @$1.for details ,contact Billy for help or mc chant (get elec. form rx.ch5 turn on & off will your tx). otherwise you can buy a headlight in duck`s street which had 5leds & then.....call me at 92333826 for details 
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| Author: | Alexis Lip [ Tue Feb 01, 2005 1:44 pm ] |
| Post subject: | |
Mak, This may help, Resistor calculation to limit current http://home.so-net.net.tw/eric_chu/LED_rst/LED_rst.htm Alexis |
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| Author: | K.Y.Mak [ Tue Feb 01, 2005 9:11 pm ] |
| Post subject: | |
Hi, Thank you all for the suggestions, but it is getting complicated ! The LED torch will get used once or twice a year. If the LEDs can last for the jorney down the hill, it'll be OK for some of them to be burned in a long run. They are so cheap to replace ! However, since there are different voltage for each colour. and I've got LEDs in many different colours ! Can one of you list out the voltage for each colour please! |
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