LED Question
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
LED Question I tried to install the led in my Monsoon Stereo and I placed the resistor on the positive side(anodes)of the LED. BUT going by direction from the web site below He's saying to install them on the negitive side(Cathode) of the LED. I'm I had them install with the resistor on the postive side and when I went to do them by his directions ended up pulling some of the copper ribbon off the back. NEED a new Monsoon Stereo Any Help Would be Greatly APPRECIATED!!!
http://xse.com/leres/ss/leds.html
Thanks and have a great Sunday,
John Junkins
http://xse.com/leres/ss/leds.html
Thanks and have a great Sunday,
John Junkins
TECH Enthusiast
Joined: Aug 2005
Posts: 672
Likes: 3
From: Washington Crossing, PA
same directions i used when i did mine and i also put the resistors on the positive side. i remember how much of a pain it was to take the headunit apart to work on it. did the ribbon tare or is there anyway you can re-connect it back together?
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
Tried to resolder it but it won't stick.. I might try the sand paper.. I also had a little smoke come out of it when I first installed them the wrong way.. Hope it didn't fry it..
John Junkins
John Junkins
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Verdad Gallardo Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
And what Resistors did you use.. The ones in the pics are 5.6K Green, Blue, Red, Gold +/- 5% and he is saying 680 ohm 1/4 watt resistors??? PLEASE let me know
Thanks Again,
John Junkins
Thanks Again,
John Junkins
TECH Enthusiast
Joined: Aug 2005
Posts: 672
Likes: 3
From: Washington Crossing, PA
i had to do a trial and error to see what was positive and negative on the headunit. once i found the positive on one then i could follow it back to the next light and continue from there. as far as resistors you'll have to figure that out by the specs on the leds you have, not by the ones he has listed on his site because all leds are different.
Joined: Nov 2003
Posts: 11,332
Likes: 347
From: Jacksonville, FL (originally from Toronto Canada)
Technically, it makes absolutely no difference whether you put the resistor on the positive or negative side (anode or cathode). The resistor is there to limit current flow through the LED and it will do so regardless of which side it's installed on.
There are non-technical reasons why the convention is to install on the positive side. One is that if an accidental short occurs between the LED and the resistor it wouldn't destroy the LED. It's kind of the same reason that it's recommended to disconnect the negative cable of the battery before the positive - there is no electrical reason to prefer one over the other but it helps prevent accidents.
There are non-technical reasons why the convention is to install on the positive side. One is that if an accidental short occurs between the LED and the resistor it wouldn't destroy the LED. It's kind of the same reason that it's recommended to disconnect the negative cable of the battery before the positive - there is no electrical reason to prefer one over the other but it helps prevent accidents.
in order to fix the copper trace, use an exacto knife to scratch away the overlay covering the copper trace that is still in tact, then solder a piece of wire to it, if it is too hard to solder go buy a bottle or pen of "rework flux" (probably can find it at radio shack or an equivalent electronics store, put a little of that on the copper and you should be able to easily solder to it. Usually ground plans are very hard to solder to because they are so large that they dissipate a lot of heat, causing the area you want to solder to not get hot enough for the solder to melt and stick.
