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LED resistance


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44dawgs 
Member - Posts: 31
Member spacespace
Joined: January 26, 2005
Location: Mexico
Posted: February 03, 2005 at 10:34 AM / IP Logged  

could anyone tell me what should be the value of a resistance for a high intensity LED? i'm going to use to light a few acrylic panels in my install.

thanks for your help.

xetmes 
Silver - Posts: 586
Silver spacespace
Joined: May 18, 2003
Posted: February 03, 2005 at 12:11 PM / IP Logged  

huh? what do acrylic panels have to do with the resistance of an LED?

LEDs do not have a specific resistance, they are non-linear devices.

ohh wait i reread that you want the resistor to put in series with the LED? how much current can it handle?

BaggedTruck 
Member - Posts: 16
Member spacespace
Joined: April 12, 2004
Location: United States
Posted: February 04, 2005 at 12:38 AM / IP Logged  

if you are going to wire up some LED's on 12 volt--depending on the voltage each requires - thats what determines you resistance.  if you have LED's that require 3.3-3.5v you'd need about a 330 ohm resistor to run them on 12 volts. Here is a link to a resistance calc..........http://www.ledsupply.com/reca.html.......just cut/paste...and when you calculate 12v, you should really up it to around 13.4.

-Nick

Don't hop it...Bodydrop it
44dawgs 
Member - Posts: 31
Member spacespace
Joined: January 26, 2005
Location: Mexico
Posted: February 07, 2005 at 7:57 PM / IP Logged  
thanks a million! i should have been more specific, yes, I used a 330 ohm resistor, it worked out grand. I'll post some pics when I'm done!!

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