Resistor & LED placement

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Sandy_Crack
 
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Resistor & LED placement

Post by Sandy_Crack »

Hi,
I'm about to wire up a heap of "dumb" LEDs to a +ve supply and wonder if there is any benefits to putting the current limiting resistor on the "+ve " side of the LED as apposed to the GND or " 0 ve" side

Thanks in advance
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dastels
 
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Re: Resistor & LED placement

Post by dastels »

Doesn't matter at all. The same current flow through both either way which means the excess voltage is across the resistor.

Dave

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Sandy_Crack
 
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Re: Resistor & LED placement

Post by Sandy_Crack »

Thanks,
Thats what I thought, I'd thought I would just check incase there were some slight esoteric reasons for one whay over the other

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jps2000
 
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Re: Resistor & LED placement

Post by jps2000 »

Electrically there is no difference.
However thermically it could be different depending on other circumstances. LEDs should be as cool as possible. So it may be for example that GND wire conducts better temperature.
But the in-flu-ence on reliability is probably small.
Remark: The word with the two - is a banned word???
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Re: Resistor & LED placement

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jps2000 wrote:Remark: The word with the two - is a banned word???
Apparently the link spammers are making lots of references to people who try to get free meals by saying they'll post photos of themselves to Twitter.

The wheel of random keywords stops at strange places sometimes, and our automated spam filters follow along.

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