317Views7Replies

Author Options:

my leds not work Answered

is it possible to run 5mm white(3.3v each) 6 led series by 5v adapter without any rasister????

Tags:leds

Discussions

0
None
Jack A Lopez

Best Answer 11 months ago

You should use some resistors.

The math for calculating what size resistors is pretty easy. Also pages like this,

http://led.linear1.org/1led.wiz

http://led.linear1.org/led.wiz

can do the math for you. If you know how much current you want to flow through the LEDs, then use that number. Otherwise, I suggest 20 milliamperes (20 mA) as a typical, safe but still bright, amount of current for a 5 mm size LED.

0
None
neelpalJack A Lopez

Answer 11 months ago

what is

(diode forward voltage) how di i khow

0
None
Downunder35m

11 months ago

You don't need another topic for this as you already got the answer in your previous one ;)

0
None
neelpalDownunder35m

Answer 11 months ago

i didn't know before my first question was answered i show it aftere post this question