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#474960 - 03/14/08 05:46 PM Single standard LED with 12volts [Re: monneysi]
TCPMeta MacModder Registered: 11/15/07 Posts: 1797 Loc: Florida, USA	Anyone know the type of resistor is needed for turning a standard LED 3 or 5 volt to handle 12 volts? _________________________ To live is to let die
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#474961 - 03/15/08 07:59 AM Re: Single standard LED with 12volts [Re: monneysi]
soundmann18 Registered: 05/19/05 Posts: 342	do you know what current you need? the equation would be (12V - 3V)/current. So, in general (Source Voltage - LED Voltage)/Current. If you don't know the current, something like 20-25 mA is probably safe.
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#474962 - 03/20/08 05:54 PM Re: Single standard LED with 12volts [Re: monneysi]
TCPMeta MacModder Registered: 11/15/07 Posts: 1797 Loc: Florida, USA	What ever how many cars use. I'm trying to build a custom circuit for my carputer _________________________ To live is to let die
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#474963 - 03/24/08 08:37 AM Re: Single standard LED with 12volts [Re: monneysi]
flippy10 Registered: 09/05/07 Posts: 166 Loc: Pelham	1K Resistors, I've used them with 12V before and it's fine. They should provide ample current for the LED unless it's extremely high draw. Not only that but a pack of 6, from Radioshack (U.S. Electronics Store) is something around 1.15$ http://ourworld.compuserve.com/homepages/Bill_Bowden/led.htm You can also use that. If you don't know the stats on your LED, do your best to figure them out. Usually they'll be on the packaging, unless you've sourced from a surplus or another machine, etc.
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#474964 - 03/27/08 06:24 PM Re: Single standard LED with 12volts [Re: monneysi]
TCPMeta MacModder Registered: 11/15/07 Posts: 1797 Loc: Florida, USA	I finally got the full specs of the LEDs I want to use and also found the correct voltage. 12.9v - 7.76v(1.94x4)= 5.14 / 35ma = ~150ohm _________________________ To live is to let die
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