soldering leds

[armis]

 i got the led soldered ....now i wanted to test it..i put  2 AAA batteries because i tried 1 and didnt work. I quickly lit up and burnt i think... what battery should i use to test it out?

[bustinthejustin]

Depends, what color is it?

[armis]

its red...i also got white and blue ones

[bustinthejustin]

Red leds run on about 2 volts, white on about 3, and blue on about 3.3. On the side of batteries, they usually say their voltage. When you put batteries together, you just gotta make sure their voltages add up to less than what the led is supposed to run on. Blue would run fine on two AA batteries, although brand new alkaline batteries usually end up at about 1.8v each, so it might be pushing it. You just gotta find the right batteries, or better yet, use the diode test on a multimeter.

[staxx]

I usually just test mine out on the psp's speaker...just hold the ends to the contact points...easy peasy.

[armis]

got it right from the 12th time. Burned the 13th led and 14th and 15th were soldered well!!! wooot
sodlered points on red leds prob burned off cuz 2 AA battereies were too much.