102Views4Replies

Author Options:

is it highly necessary to use resistors on leds. Answered

i want to do a small tiny project using only 3 led's with no resistor,now the led's are 3.3v,i only want to use 4.5v of battery power,but i was thinking of wiring it in parallel although that drains more battery power,any help would be highly appreciated thanks....

Tags:leds

4 Replies

user
icengBest Answer (author)2011-12-10

OMG  the resistor goes in series with the LED.
You can go here to design an LED circuit of your own.   .   .   A

Select as Best AnswerUndo Best Answer

user
Sandeep P. Varshney (author)2011-12-10

Yes, it is highly necessary. You can use the calculator pointed to by iceng below to get an accurate resistor value as per your need.

Select as Best AnswerUndo Best Answer

user
Jack A Lopez (author)2011-12-10

Resistors are necessary, and good. How else are you going to control how much current flows through your LEDs?

Select as Best AnswerUndo Best Answer

user
aelias36 (author)2011-12-10

Pretty much. They're going to burn out really quickly unless you limit current.

Select as Best AnswerUndo Best Answer