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Thread: pinout voltage for power on on mobo

  1. #1
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    pinout voltage for power on on mobo

    dose the momentary contact switch use 5 or 12v to power up the system- if its 5 would it be bad if i used 12v????
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  2. #2
    jol
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    Re: pinout voltage for power on on mobo

    I dont know what you mean, but i guess it's one of the two


    I mean power good:
    (taken from some site that sells the delay circuit)

    Power Good (PG) Delay and Off Delay

    Power Good (PG) Delay and Off Delay: It takes a power supply at least 100ms to completely power up before it can offer the proper DC voltages to the computer. The computer will not attempt to turn on until the power supply is finished powering up and sends a Power Good (PG) signal to the motherboard via a PG terminal. On power up the Power Good (PG) terminal is polled for a brief period before the PC turns on to check the status of the power supply. Only after the +5V and +3.3V rails are above threshhold does the PG signal go "high." The PG signal stays on until the PC is ready to power off. The period of delay between switching on the PS and the actual application of power is the PG delay. Typical values are 100-300ms. The PG delay of the power supply should roughly match the PG delay specification of the motherboard or power on problems may occur. When shutting off the PS a delay of about 1ms is required. This is called the Off delay.

    The PG signal is generated by the +5V terminal plus a 10K resister.
    Frequently the PG terminal is attached to a watch dog timer card. The watch dog timer card will issue and alert if the power supply goes down.
    guess that'll do

    I just want to start the psu w/o mobo:

    connect the green cable to any groundasd

  3. #3
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    im talking about the switch pinouts- there where the "pw switch" and the "hd led" and "pw led" and the "speaker" pluginto on the mobo- i know when you momentarily connect the 2 pw pinouts the computer boots up- i need to know what voltage it uses to do that- its either 5 or 12 volts

    these are the are the things that plug on to the the pinouts


    these are the pinouts


    i need to know the voltage the pw switch uses to activate and the voltage for the LED's
    my ride my team

    2001 Civic EX- lowered, 18", NOS
    12.1"touchscreen, gps, dvd, tv, fm
    NO RADIO!!!!!!!!!!!!!!!!!!!!!!!!!

  4. #4
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    Funny lookin pinouts.. lol... why can't you just measure it??

  5. #5
    jol
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    if ure 100 percen sure its one of them, try 5 first, and then 12...I thought that you just shorted the pins and the mobo sent back the +5always on signal to the mobo, or shortened the green to ground..

  6. #6
    Variable Bitrate
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    If your talking about how much voltage is used by the MB header to turn on the MB and PSU, it doesnt work like that. You wont be able to just bung a voltage on the header and expect it to work. The power on signal works thus: one of the pins is connected to the circuit, the other to ground, when you join the two it creates a complete circuit.

    Besides, if you just want to create a remote activation line, just extend the header to where every you want it and connect it up.

    The leds are usually 5v, just take a connection from your 5v psu line, and connect a resistor in-line to stop em burning out.

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