Front LED's Which way round?

Colbaker

Colbaker

Colbaker

Associate
Joined
8 Dec 2004
Posts
1,970
Location
Paignton, Devon
Hi, I am building another computer and have never really paid attention to what is the positive wire on the front Case LED's, I have always used trial and error, Does anyone know the Which cable (either the white one of the coloured one) is the positive?

Thanks
 
well it can vary like if is it wrong the worst that would happen is you blow the led (this is very unlikely if not impossible) and they cost very little to buy....or if your at school, steal them lol
 
nick_lerwill said:
well it can vary like if is it wrong the worst that would happen is you blow the led (this is very unlikely if not impossible) and they cost very little to buy....or if your at school, steal them lol
Click to expand...

lol! :D
 
Colbaker said:
Hi, I am building another computer and have never really paid attention to what is the positive wire on the front Case LED's, I have always used trial and error, Does anyone know the Which cable (either the white one of the coloured one) is the positive?

Thanks
Click to expand...

Generally the coloured wire is positive and the white wire is ground :).

Just match the coloured wire up to the +ve sign on the header on the motherboard.
 
Actually, if you look at the header there is a small arrow on it, that goes onto the +ve connection.

Nothing trial and error about it.

LEDs are diodes, they will not break by putting them the wrong way round, diodes are designed to prevent current going through part of a cicuit incorrectly, they are one way only. Why Light Emitting Diodes only light up one way round, the other way they are stopping the current.
 
Or just a general knowledge of what a diode is...

But yes I did GCSE Systems and Control. Complete waste of time and just spent 2 years making modifications to a transformer so it made anything plugged into it smoke.

Don't get me started about 555 timer chips aswell, so boring.

There are diodes in everything electronical, to not know what one is would be criminal.
 
Yewen said:
Or just a general knowledge of what a diode is...

But yes I did GCSE Systems and Control. Complete waste of time and just spent 2 years making modifications to a transformer so it made anything plugged into it smoke.

Don't get me started about 555 timer chips aswell, so boring.

There are diodes in everything electronical, to not know what one is would be criminal.
Click to expand...
If you start on 555's then I'm starting on Z80's - now there's a chip to be reckoned with.
Sorry 20 years too late. :(
 
Yewen said:
Or just a general knowledge of what a diode is...

But yes I did GCSE Systems and Control. Complete waste of time and just spent 2 years making modifications to a transformer so it made anything plugged into it smoke.

Don't get me started about 555 timer chips aswell, so boring.

There are diodes in everything electronical, to not know what one is would be criminal.
Click to expand...

Systems and Control was the best subject I've ever studied! Such a welcome break from the theory you're stuck with in more mainstream subjects. It's a shame that my school didn't offer anything similar for A Level, and that for my Uni course Physics and maths etc are regarded more highly. I made an automatic fan controller that actually worked :eek: :).

On the subject of LEDs: the coloured wire is usually +. On the LED its self, the flat side of the body of the LED is negative, as is the shorter of the two legs.
 
Can't damage LEDs ?????

COnnecting a diode the wrong way round cannot do any damage unless you exceed the inverse voltage limit However, these voltages are usually pretty high and NOT available within the confines of a PC. You can't damage anything, it just wont Glow if connections are reversed. :)
 
p4radox said:
Systems and Control was the best subject I've ever studied! Such a welcome break from the theory you're stuck with in more mainstream subjects. It's a shame that my school didn't offer anything similar for A Level, and that for my Uni course Physics and maths etc are regarded more highly. I made an automatic fan controller that actually worked :eek: :).

On the subject of LEDs: the coloured wire is usually +. On the LED its self, the flat side of the body of the LED is negative, as is the shorter of the two legs.
Click to expand...

I had a teacher who was absolutely useless. He couldnt get any circuit working and me and my mate basically taught a group of the class up to Grade C in one 2 hour sitting. Useless teacher. :o

Good subject if you had a half good teacher though, huge scope in what you could actually do.
 
Yewen said:
I had a teacher who was absolutely useless. He couldnt get any circuit working and me and my mate basically taught a group of the class up to Grade C in one 2 hour sitting. Useless teacher. :o

Good subject if you had a half good teacher though, huge scope in what you could actually do.
Click to expand...

Ah, shame that. My teacher was a real enthusiast. I know what it's like to have a subject strangled by poor teaching.
 
I loved Systems and Control. Out teacher was great. We even made a remote control hovercraft in our spare time, one we had finished out lesson work. Scared the teacher a bit though, as it started dragging the desk that it was bolted to across the room. :)
 
You must log in or register to reply here.
Back
Top Bottom