wiring my own power button...

[Jakeblues]

I have a regular 3 terminal, what is that SPST?, anyway, i can wire it to turn on with an ATX M/B but trying to get it to turn off is another thing entirely, anybody have any suggestions? Is there another way to wire it, right now i have power and load tied together and ground separately, i think that's it..i can't get to it at the moment. Is there a better way to do this?
Thanks

 

[LintMan]

SPST is "Single Position - Single Throw".
The position part is the number of different contact (closed) positions the switch can have. So Single Position means the switch is either open or closed. A Double Position switch would have 2 closed positions, say for a switch to set forward/reverse on a kids toy.

The throw part is the number of separate lines/circuits that are switched simultaneously by the switch. Single throw means just a single circuit. Double Throw would be 2 lines.

A 3 terminal switch doesn't sound like what you'd want for a ATX MB. SPST should only have 2 terminals, I think. I also think that the ATX standard is just a pulse on the power-up line to power it up (ie: you want a momentary contact switch, not one that stays closed). Check your MB manual - it might give more details.

Good luck!

 

[element2k5]

lint man is right if u are using an atx mobo u need a pushbutton switch that stays open when u let go...

 

[sygyzy]

Best switch to use in this case is those push button ones. They are generally red and circular. Easily found at Radioshack.

 

[GoldMember]

Tell you what dude.. Drop me an E-mail

info@icefoundry.com

I'll give you a pic of the switches I use on my case. They can be used for anything that does VDC. (Volts DC).

They are also illuminated with red LED and they needa 12vdc current to make the LED come on. That is a yellow PSU cable.

They are about 2 to 3 dollars each from Radioshack. I use them for power switches for PSU's so I can turn them on and off w/o having the PSU hooked up to the mobo, fans, lights, and what not. I also have my pump rigged up using a 120VAC illuminated switch. That way I can turn my water-pump on and off from my control panel on the front of my PC. If you want a pic of the switches let me know. I can probably get you Radioshack part numbers on them. I'll post pic's of my machine soon.

 

[pbrain]

spst is single pole, single throw; it's akin to a light switch (on-off). atx mb's use normally-open push button switches--when you push the button it closes the circuit and when you release the button the circuit opens. you *could* use a spst switch on the power-on header on the atx mobo, but push button switches are the proper ones to use.

if your mobo supports apci then selecting "shutdown" through the os should turn off the computer. shorting the power-on headers will work in any case.

 

[Croton]

i was at radio shack and i just got these.

i got the spst mini momentary pushbutton switch.

part number 275-1547C

N.O. contacts rated 0.5A @ 125VAC, 0.3A @ 50VDC
These should be good enough............

someone correct me if i'm wrong.

 

[Jakeblues]

sorry, i meant the SPST thing as a rhetorical question, i do get them all confused, i usually just go and grab what i need and not pay attention to what exactly it's called..i'll go and grab a push button switch though, thanks everybody for answering me though, it helped a lot.
Jakeblues

 

[randomlinh]

you need a spst momentary (one that stays open when not pushed... not sure if that's momentary closed or open).

let me suggest not using the red push button one. I used that on my plexi for the reset (had a toggle for my power) and ppl were just drawn to pusing the little red button