 5 leds 4 resistors, how should i do it |
 Jun 2, 2005 - 4:56 PM
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 Enthusiast  Joined Aug 18, '04 From St. Louis, Missouri Currently Offline Reputation: 0 (0%)  |
i have a 12v source, (4) 540 ohm resistors, and (5) 3.3v LED's that need ~ 20-25mA each. how do i do this?
EDIT: just did a resistor calculator, and it says the resistors are 560ohm. This post has been edited by rocky2006: Jun 2, 2005 - 5:01 PM --------------------  |
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Jun 4, 2005 - 8:07 PM
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Enthusiast Joined Aug 18, '04 From St. Louis, Missouri Currently Offline Reputation: 0 (0%) |
the hard part was finding out how to wire it up. when i found this website it made it much easier.
http://metku.net/index.html?sect=view&n=1&...dcalc/index_eng i used shoe goo to glue the LEDs in place which took some time to dry. i took the unit out of the car to do some soddering work. i used the power from the cigarette lighter light that way i got 12v and the LEDs would turn on only when the driving lights or headlights are on. some pics of LEDs glued in and glue.   
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Posts in this topic
rocky2006 5 leds 4 resistors, how should i do it Jun 2, 2005 - 4:56 PM
SoundSlut_dotcom ask clipset tuner Jun 2, 2005 - 5:07 PM rocky2006 pm'ed clipsetuner. is there anyone else that ... Jun 2, 2005 - 5:21 PM DamDirtyApes hmmm i think u should have the - of the first led ... Jun 2, 2005 - 6:01 PM rocky2006 i dont think that would work. 12v/5 leds would gi... Jun 2, 2005 - 7:01 PM mark_426 It needs to be in series. Parallel will not work, ... Jun 2, 2005 - 8:01 PM DamDirtyApes yeah, what i just said would put it in series Jun 2, 2005 - 9:20 PM Snarfer you are only going to get 3.2mA per led with that ... Jun 2, 2005 - 9:39 PM rocky2006 before i waited for replies, i did that setup and ... Jun 3, 2005 - 1:59 AM rocky2006 if anyone else does this in blue, use a 100 ohm re... Jun 4, 2005 - 2:11 PM mark_426 How hard was it to do, did you take the unit out, ... Jun 4, 2005 - 3:38 PM
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