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Newbie LED series resistor

Posted: Fri Sep 21, 2012 6:25 pm
by crispylees
Hi,

Newbie question - but I will remember the answers and gradually learn!

If I have created a potential divider to provide the power supply for a LED should I still put a resistor in series to control current, or does the aggregate resistance of the potential divider do the job anyway?

Thanks

Re: Newbie LED series resistor

Posted: Wed Sep 26, 2012 8:09 pm
by winelight
My question would be why have a potential divider, normally you just put an appropriate series resistor between the LED and the supply. In theory you could look up the LED data sheet and calculate the right value, or you could just use 330R for 5V, that usually works for me.

Re: Newbie LED series resistor

Posted: Thu Oct 18, 2012 9:43 am
by crispylees
ErnestTeel wrote:Very clever. Care to tell us how you did it without using a flashing LED?
Hi, ErnestTell - who is the question to; me or winelight?

Thanks