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How do I reduce 12V to 1V?


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jman1113 
Member - Posts: 6
Member spacespace
Joined: February 17, 2004
Location: United States
Posted: September 23, 2004 at 9:07 AM / IP Logged  
  How do I reduce 12V to 1V?   I am using a 1volt led and don't want to blow it as its a stock bulb.I could get a 12V led but it would'nt be stock.Thanks in advance,Joe
hi
Teken 
Gold - Posts: 1,492
Gold spacespace
Joined: August 04, 2002
Location: Aruba
Posted: September 26, 2004 at 8:46 PM / IP Logged  
470 - 550 ohm 1/4 watt resistor. Idealy you would have provided a current value for the LED, to be more accurate. But this range will do fine for a general purpose voltage drop.
Regards
EVIL Teken . . .
jman1113 
Member - Posts: 6
Member spacespace
Joined: February 17, 2004
Location: United States
Posted: September 27, 2004 at 8:40 AM / IP Logged  
Thanks for getting back w/me.So I add the 1/4 watt resistor inline on the + side and that will do it . I am retro fitting my 00 vette with passenger side airbag cutoff switch and wanted the stock indicator light and bezel. this will complete it.Thanx again.J
hi
Mongol 
Member - Posts: 3
Member spacespace
Joined: July 22, 2004
Location: United States
Posted: October 06, 2004 at 10:32 AM / IP Logged  
The LED really doesn't care if you give it 1 volt or 12 volts the thing that will hurt it is the current putting a resistor in line with the LED is what you want to do. Since this will be a series circuit the LED doesn't care if you put the resistor in on the + side or the - side just as long as you've got a resistor somewhere between about 200K ohm and 200 ohm. I'd tell you to use a resistor at or around 1k ohm. Remember the LED only works one direction, you won't hurt it if you hook it up backwards, but it only works one direction.

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