Is there such thing as a 5volt white LED

[millertime]

Well is there and if there is where can i get one.

[[Oc]acaridans]

you could try this site.. they look to have a large selection
BTW i did find a 5v white on this site

http://www.ledtronics.com/

[millertime]

thanks man

[GruntmaN]

The 5V usually have a low light output. You can use a pot or a resistor for the 3.7V ones. An ultrabright is usually 2000mcd where a normal LED is around 100-400mcd. Make sure to check this out if you want it bright.

[Crazy Jayhawk]

Radio Shack sells 3V white LEDs that are really bright. Just put a resistor in line with the LED and you can run it on 5V. :cool:

[millertime]

Originally posted by Crazy Jayhawk
Radio Shack sells 3V white LEDs that are really bright. Just put a resistor in line with the LED and you can run it on 5V. :cool: what size resistor should I use?

[PhoenixMDM]

If your talking about those white radio shack ones:

amps = volts/oms

is ohms law, lets ya find all kindsa great stuff like resistance.

i happen to know that the radio shack white LEDs use 20ma (i have the package from one right here:D )

so it would be .02 = 5/x .02x = 5 x = 250

So you would need something close to 250 ohms. You can either get a 250ohm one (dunno if they exist) or you can run a few lesser ones in a series to get them to add up to 250. Keep in mind, radio shack LEDs seem to be able to handle a little more than what they're rated for, so if you gave it a 220 (i know those ones exist) it'd probably handle it fine.

[millertime]

thanks pheonix that helps alot. I remember the ohm law from algerbra now.