OMGNOOBIE ?????'s

**Gutter** · 09-25-2004, 04:20 PM

I"M A HUGE NOOBIES TO THIS COMPUTER+CAR THING!!@

Anyway, I need a 2-pos rotary switch to power an ATX motherboard on and off (properly, not just cutting power). El Search-o function-o hasn't turned up anything but my old thread.

Because it's an ATX motherboard, the PWRON jumpers need to be shorted momentarily in order to do this. Just using a rotary switch by itself won't work because it'll keep the circuit closed.

Anyone have any momentary switch circuits that'll work?

Help.

**gospeed.racer** · 09-25-2004, 04:31 PM

Like these?
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WD1V

**Gutter** · 09-25-2004, 05:19 PM

No, premade ones return to center when you turn them, kinda like the ignition in your car. I need a definite *click* when you turn the knob left or right and it needs to stay there. I drew up a schematic using some capacitors, but it didn't quite work.

**gospeed.racer** · 09-25-2004, 05:44 PM

....So when you turn it, you need a "click" and a momentary pulse, but no spring return? whoa, ok, never seen them before!

**Gutter** · 09-25-2004, 06:30 PM

I know, that's why I need a circuit that will short the PWRON jumper on the motherboard for 1 second when I turn the switch to either position. I know the switch alone doesn't exist.

My short-lived idea was to have two capacitors; one that would charge while the other discharges for about one second and causes a SCR rectifier to close the circuit for a second. I just couldn't come up with a working prototype.

**xBrady** · 09-25-2004, 06:52 PM

Originally Posted by Gutter

I"M A HUGE NOOBIES TO THIS COMPUTER+CAR THING!!@

If you didn't notice your caps lock is on.

**Gutter** · 09-25-2004, 06:57 PM

Originally Posted by brady

If you didn't notice your caps lock is on.

I had to make this an on-topic post somehow.

**Beowulf404** · 09-25-2004, 07:40 PM

Why dont you use Push button instead???

**Tidder** · 09-25-2004, 07:52 PM

Here ya go, you need one of these with a rotary switch.
http://www.grainger.com/Grainger/pro...mId=1611601184

This one is actually for AC, but I bought one for my car that's DC. This is all I could find in a 30sec search.