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Author Topic: Led wiring  (Read 1895 times)

Captain fizz

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Led wiring
« on: April 22, 2016, 07:53:42 am »

when wiring led circuits, is it necessary to use a resister for each led or can they be wired in pairs with only one resister?


Simon
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g6swj

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Re: Led wiring
« Reply #1 on: April 22, 2016, 08:33:29 am »

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Captain fizz

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Re: Led wiring
« Reply #2 on: April 22, 2016, 08:43:16 am »

Thanks Jonathon, individual resistors it is.


Simon
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Stan

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Re: Led wiring
« Reply #3 on: April 22, 2016, 09:30:49 am »

P/M sent also.

Stan
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Brian60

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Re: Led wiring
« Reply #4 on: April 22, 2016, 01:01:29 pm »

However that only addresses led's in parallel. It is perfectly acceptable to link them in series with only one resistor

Umi_Ryuzuki

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Re: Led wiring
« Reply #5 on: April 22, 2016, 06:33:25 pm »

You can use one resistor for a matched pair of LED, but at some point you will have to
increase the wattage of the resistor. If there is too much amp draw, say for a 1/8 watt resistor it will burn out.
Resistors are available in several watt ratings.  So it would depend on the "maths".

 ok2

Most of the time I have a resistor at each LED.

I know others that will run them in series and add up the voltages to match the power.
But like Christmas lights if one goes bad you lose the string. A voltage spike can do that.
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