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Lan-led Issue


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#1 GoTeamScotch

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Posted 22 July 2009 - 11:45 AM

I have a quick Q for you Xbox gurus-

I just did a LAN-link LED activity indicator mod and it works, it blinks whenever there is LAN activity going on but the thing is, it never goes out completely. When there is no activity, it stays lit but it is very dim.

I doubt it is supposed to be like that but I checked all my connections and solder points so maybe it is...? I'm using a 5v going to the anode (+) of the LED source (ties into the same source as the HDD molex power connector but on the underside of the mo'bo where the PSU snaps on). The (-) is going though a 100 ohm resistor then to the solder point for LAN activity seen here>>>
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pics-
LAN activity
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no LAN activity
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STILL ON! but very dim.

the red light is the HDD activity light. It shares a power source with the LAN led but they blink separately.

edit- i just noticed there is a faint static-like noise that occurs whenever the LAN led is fully lit.
hmm...yep, must have screwed something up. I'll look into this more later

any tips?

Edited by GoTeamScotch, 22 July 2009 - 11:49 AM.


#2 Alex548

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Posted 22 July 2009 - 10:50 PM

What size is the LED? If it's a 3mm LED, try using 3.3v as your source of power. You can grab that from the motherboard connector for the controller ports. smile.gif

Edited by Alex548, 22 July 2009 - 10:52 PM.


#3 GoTeamScotch

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Posted 22 July 2009 - 11:17 PM

QUOTE(Alex548 @ Jul 22 2009, 02:50 PM) View Post

What size is the LED? If it's a 3mm LED, try using 3.3v as your source of power. You can grab that from the motherboard connector for the controller ports. smile.gif

its a 5mm if i'm not mistaken.

USB outputs 5v, so you must mean the data line right? The data (+) line is 3.3v?

#4 Alex548

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Posted 22 July 2009 - 11:40 PM

Since you're using 5mm, then the 5v source should be fine. Wrong size resistor perhaps?
I noticed other tutorials mention 220 OHM resistor and you said you're using 100 OHM.

QUOTE
USB outputs 5v, so you must mean the data line right? The data (+) line is 3.3v?

I was actually thinking power/eject connector on the motherboard, but mistakenly said controller ports. Sorry.
No big deal anyway since you need 5v power.

Well, according to SICKdimension's resistor calculator, you should be using 1/4 100 OHM resistor so that's not your problem either.... huh.gif

What gauge wire are you using?

Edited by Alex548, 22 July 2009 - 11:53 PM.


#5 GoTeamScotch

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Posted 23 July 2009 - 01:24 AM

QUOTE(Alex548 @ Jul 22 2009, 03:40 PM) View Post

Since you're using 5mm, then the 5v source should be fine. Wrong size resistor perhaps?
I noticed other tutorials mention 220 OHM resistor and you said you're using 100 OHM.
I was actually thinking power/eject connector on the motherboard, but mistakenly said controller ports. Sorry.
No big deal anyway since you need 5v power.

Well, according to SICKdimension's resistor calculator, you should be using 1/4 100 OHM resistor so that's not your problem either.... huh.gif

What gauge wire are you using?

I'm using a 1/4 watt 100 ohm resistor. I'm thinking it may be something to do with the wire I'm using. Its wires from an old IDE cable I split up. Had it lying around. I'll rewire it using a different wire and see if that works.


ty for the wisdom from your bucket of knowledge alex

#6 xman954

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Posted 23 July 2009 - 03:27 AM

you need 3.3vdc not 5vdc

you could also put a series diode (1N4001) in the 5vdc line (drops 5vdc to 4.3 and the led will not light untill it's pulled low by the NIC)



#7 GoTeamScotch

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Posted 23 July 2009 - 04:58 AM

Ok so 3.3v is the way to go? I'll give that a go when I tear into it in a bit.

Before I go off to search the forums and sift through pages of Xbox 360 results, could anyone tell me where I could get an easy 3.3v source off the mo'bo?

@alex, you mean this connector? >>
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I don't follow uhh.gif

#8 Joes2Silly

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Posted 24 July 2009 - 12:55 AM

Get the 3.3V off of the controller ports, not the PE board wink.gif

#9 GoTeamScotch

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Posted 24 July 2009 - 01:28 AM

---USB---
Red: +5v
White: Data +
Green: Data -
Black: Ground -

Where are you seeing 3.3v?

I tried the +5, looks exactly the same as before. I tried the Data + line just for the hell of it and nothing happened-> not enough power i suppose.

#10 Joes2Silly

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Posted 24 July 2009 - 05:51 AM

Okay, I'm positive you can pull 3.3V from the xboxs' LPC

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#11 lostboyz

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Posted 24 July 2009 - 07:24 AM

or just go straight from the power supply connector, which depends on what version you have

If I remember right when I had a lan activity led is that it was normally on and blinked off with activity, its been awhile though.

#12 JBmtk

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Posted 05 August 2009 - 05:44 PM

anytime you need power, power off straight from the PSU. This is the safest idea as someone already mentioned in here. Most people here just assume that if they can find a voltage, then pulling off from it will be safe. This is so incorrect and may damage your board. For your case, a 20ma LED will not hurt most components, but it is bad practice and if your wiring of the circuit goes to hell, then so does your board.

Edited by JBmtk, 05 August 2009 - 05:46 PM.


#13 Bandit5317

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Posted 05 August 2009 - 10:46 PM

If you have a version 1.0-1.5 Xbox, then all of the orange wires coming from the PSU are switched 3.3v. If it's a v1.6, then it may be the same way, but I don't have one in front of me to look at. According to the sickmods diagrams, the v1.6 doesn't have a switched 3.3v point coming from the PSU, but I believe it's incorrect.




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