10 LEDs lit it up acording to potentiometer variation

adrianbodor · 5th November 2005, 05:05 AM

Hy,

I want to build a circuit based on 10 leds & pot (anyway this is the ideea only, other components is needed also)

My question is how can I make all those leds to light up acording to the potentiometer variation.

When I have the pot set to minimum i want all leds down,when is set to middle only first 5 leds to be lit & when all leds are lit pot is set to maximum

Anyway i think u get the idea. Anyone knows such a circuit, ICs or links to all this?

Thx Adrian,

AudioFreak · 5th November 2005, 05:11 AM

What other requirements do you have? supply voltage/s etc?

Nordic · 5th November 2005, 05:19 AM

Well I suppose you will start with a dual gang pot, one half to be used as the pot for your regular circuit and one to controll the LEDs, I suppose a 3 gang one would allow you even stereo control.

You will also need a little circuit to measure voltage and then light the LEDS, I think there are LED VU meter circuits that you could slide right in there.

adrianbodor · 5th November 2005, 05:50 AM

Yes i was thinking to use a dual pot, one for my circuit & the other one for the leds but it is only an ideea.

I don't know what IC to use that's why I need some schematic for this.

karma · 5th November 2005, 05:54 AM

i have a not so old dvd player with just that setup.if you want i can take some pics. im sure this ones all digital.

nordics 3 gang pot allso would work for this purpose. and cheaper

adrianbodor · 5th November 2005, 06:46 AM

Anything that would help me, pictures, circuits, links, anything
Thx in advance

Adrian,

karma · 5th November 2005, 07:23 AM

well theres not much to this one all of it is surface mount.

but here some pics anyway

karma · 5th November 2005, 07:24 AM

.

karma · 5th November 2005, 07:26 AM

cheers

Mephistopheles · 5th November 2005, 07:26 AM

Have a look at the LM3916 datasheet

http://www.national.com/ds/LM/LM3916.pdf

I think it will do what you want.
There's a logarithmic one too if that floats ya boat.

5th November 2005, 05:05 AM	#1
adrianbodor diyAudio Member Join Date: Jul 2004 Location: Romania	10 LEDs lit it up acording to potentiometer variation Hy, I want to build a circuit based on 10 leds & pot (anyway this is the ideea only, other components is needed also) My question is how can I make all those leds to light up acording to the potentiometer variation. When I have the pot set to minimum i want all leds down,when is set to middle only first 5 leds to be lit & when all leds are lit pot is set to maximum Anyway i think u get the idea. Anyone knows such a circuit, ICs or links to all this? Thx Adrian,

5th November 2005, 05:11 AM	#2
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	What other requirements do you have? supply voltage/s etc? __________________ - Dan

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5th November 2005, 05:19 AM	#3
Nordic diyAudio Member Join Date: Sep 2005	Well I suppose you will start with a dual gang pot, one half to be used as the pot for your regular circuit and one to controll the LEDs, I suppose a 3 gang one would allow you even stereo control. You will also need a little circuit to measure voltage and then light the LEDS, I think there are LED VU meter circuits that you could slide right in there.

5th November 2005, 05:50 AM	#4
adrianbodor diyAudio Member Join Date: Jul 2004 Location: Romania	Yes i was thinking to use a dual pot, one for my circuit & the other one for the leds but it is only an ideea. I don't know what IC to use that's why I need some schematic for this.

5th November 2005, 05:54 AM	#5
karma diyAudio Member Join Date: Feb 2003 Location: hamilton,ontario	i have a not so old dvd player with just that setup.if you want i can take some pics. im sure this ones all digital. nordics 3 gang pot allso would work for this purpose. and cheaper

5th November 2005, 06:46 AM	#6
adrianbodor diyAudio Member Join Date: Jul 2004 Location: Romania	Anything that would help me, pictures, circuits, links, anything Thx in advance Adrian,

5th November 2005, 07:26 AM	#10
Mephistopheles diyAudio Member Join Date: Nov 2005	Have a look at the LM3916 datasheet http://www.national.com/ds/LM/LM3916.pdf I think it will do what you want. There's a logarithmic one too if that floats ya boat.

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