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SubWoofer LED

 
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H2oMaN
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Joined: 22 Mar 2009
Posts: 1

PostPosted: Sun Mar 22, 2009 4:56 pm    Post subject: SubWoofer LED Reply with quote

Well i am real new to electronics.

i have a 2.1 stereo system that outputs 30 watts of music.
well i have seen a few vids on hooking LED's to the system so i tried it for my self.

in my noobish experience they said the LEDs will work on every speaker system aslong as they have the juice. later that they i dismanteled a flashlight i had that i wasnt using anymore and took out 4 LED's in parallel( If im not mistaking it goes from one + to the other + ) out of it and hooked it directly to the wires of the speaker. guess what happened PooF @ low volumes it worked, i cranked it @ 10% they blew up.

2nd i got the same series again with new LED's soldered into place. and soldered if im not mistaking a 700 ohm resistor. cranked to around 60 and blew up in a few secconds.

so im guessing i need a stronger resistor.

went to Check the voltage coming out of the wires when the speaker is fully cranked, it went from 80v - 700v on the reading the 700 is the realy high pitched bass and last fraction of a seccond. but the avg voltage was around 127 - 210 while playing fully cranked.

what i know is a led can resist only around 2.

the question is what is the best way convert this high power to the 2-4 volts needed for the LED.

some1 told me to make them into series so 4 LED's can take on around 10volts.

so any1 can give me suggestions i can use.

thank you in advanced.
i can solder and wire anything fine. but i don't have to knowledge of calculating for components needed.
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Alan
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Joined: 29 Jan 2006
Posts: 1399
Location: Winnipeg, MB

PostPosted: Tue Mar 24, 2009 11:42 pm    Post subject: Reply with quote

Have a look at the circuit listed on this page
http://forum.allaboutcircuits.com/showthread.php?t=6708

It should do what you need without blowing up the LEDs.
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