So i need a motherboard power switch for my case. I was wondering what kind of switch I'd need. Voltage especially. I saw many 5pin switches with nominal value of 3A/250V AC. With a 12V LED. Would something like that work on a motherboard?Consulting my Asus z170p manual it dosen't say much about the kind of switch i need.
Motherboard power switch.
- Thread starter filippo94
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Shaun o
Illustrious
- Oct 7, 2007
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Are you talking about connecting a switch for your case, where it connects to the Led,Power, reset switch pins of the motherboard header block on the motherboard it`s self ? bridging two pins for the power switch.
The switch on most cases used as a power on, or off button is only a momentary switch of the No type, normally open.
The system is turned on when the loop, or wired momentary switch is pressed down to create a closed loop circuit.
It does not carry a voltage.
The motherboard simply senses the loop is closed.
And then the motherboard it`s self and the power circuits hold the power on state open all of the time, till the button is pressed again triggering a power off state.
Or by windows signalling the system to power off if shutdown is selected as the power option.
No voltage is carried by the power switch you see on pc tower or case.
It just works on a circuit, and the fact it senses when the loop is closed or completed via pressing the power button down Filippo94.
Pass a voltage down it, and you will pop your motherboard.
It`s why for example you can turn the motherboard on or off by simply bridging the two pins where the power switch should be connected to on the motherboard with something like just a flat screwdriver tip.
A simple momentary switch.
The switch on most cases used as a power on, or off button is only a momentary switch of the No type, normally open.
The system is turned on when the loop, or wired momentary switch is pressed down to create a closed loop circuit.
It does not carry a voltage.
The motherboard simply senses the loop is closed.
And then the motherboard it`s self and the power circuits hold the power on state open all of the time, till the button is pressed again triggering a power off state.
Or by windows signalling the system to power off if shutdown is selected as the power option.
No voltage is carried by the power switch you see on pc tower or case.
It just works on a circuit, and the fact it senses when the loop is closed or completed via pressing the power button down Filippo94.
Pass a voltage down it, and you will pop your motherboard.
It`s why for example you can turn the motherboard on or off by simply bridging the two pins where the power switch should be connected to on the motherboard with something like just a flat screwdriver tip.
A simple momentary switch.
mcnumpty23
Polypheme
- Jul 15, 2011
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as said any momentary switch should do the job
so a 2 pin switch will do
should be really cheap on ebay depending if you want a basic plastic switch or something fancy that lights up etc
but even a metal one that lights up should be around the £5 mark
so a 2 pin switch will do
should be really cheap on ebay depending if you want a basic plastic switch or something fancy that lights up etc
but even a metal one that lights up should be around the £5 mark
Yea your assumption was correct. But I guess to sense the loop it's closed it has to register that current is passing though it and for this to happen so sort of potential difference must also occur, even if it is neglectable!?So I guess in most switches the " 250V AC " is just an indication about the maximum voltage supported by the switch?Than it pop's dead.
So now any switch will do the trick?be it temporary or not(in this case i'd have to open/close the switch immidiatly for it not to signal the motherboard a "shutdown" signal!?)so something like this (http://) even if not the ideal switch would still work?(also i cant plug in the LED in that one since, i belive, mobo use 5v for LED?)
And in order to connect that switch, wich supports both NO and NC, how'd i do that?Just use + and -?Or I have to use +/- and the NC?Thanks for your extensive answer!
mcnumpty23
Polypheme
- Jul 15, 2011
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you can supply 5v or 12v to a led from the psu
black and red for 5v
black and yellow for 12v if you take the power from a molex connector
black and red for 5v
black and yellow for 12v if you take the power from a molex connector
But taking theme directly from the PSU would also mean that the led is always on!?Yet I'd want it to light up only whene the button is pressed, the system is on, and tourn off once the system shuts down!So supplying the 5V from the motherboard would cause the LED to light up less?Or not light up at all?
mcnumpty23
Polypheme
- Jul 15, 2011
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if you take it from a molex it will only light up when the pc is on
i run a 12v led strip off a molex and the lights go on/off when the pc does
i run a 12v led strip off a molex and the lights go on/off when the pc does
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