Electrical help - Page 2

airspirit · 08-02-2002, 01:55 PM

Oh, and if my reckoning is correct, you should be able to use an AC switch for this use. The difference in AC is that the polarity resembles a sine wave (oscillates from terminal to terminal) while DC has static polarity. If you connect your leads to the right pins on the switch it should work. Just look at the lead diagram on the back and attach it to the white and black leads (the green is the ground line).

bigben2k · 08-02-2002, 02:01 PM

That last one used to be available at Radio Scrap, I don't know if it still is (I've got a few!).

The SPST means Single Pole Single Toggle. Momentary is an extra feature on those. What you are looking for is a "Normally Open" momentary switch. AC or DC, it doesn't matter: a switch is a switch.

airspirit · 08-02-2002, 02:55 PM

Somebody finally knows what the damned abbreviations mean! I've always wondered ... that might make it easier to remember. And yes, that last switch is available at the Rat Hack as a "125VAC" switch ... it costs 5x as much, though, but its convenient, I suppose.

bigben2k · 08-02-2002, 04:02 PM

Quote:

Originally posted by airspirit
Somebody finally knows what the damned abbreviations mean! I've always wondered ... that might make it easier to remember. And yes, that last switch is available at the Rat Hack as a "125VAC" switch ... it costs 5x as much, though, but its convenient, I suppose.

He he...

SPST single pole single toggle
two pins, and the switch lever (or button) makes them either on or off.

SPDT single pole double toggle
3 pins, and the lever makes the middle one (usually) contact either one.

DPST
(4 pins) same as SPST, it's like a double switch, but with only one lever.

DPDP double pole double toggle
(6 pins) same as SPDT, like a double switch.

ECUPirate · 08-05-2002, 11:02 AM

SPST: aka, single pole single throw... (or toggle)

and Ben's right. A switch is a switch. In fact, you could take the two leads going to the switch and momentarily touch them together, and that would work.

ambient · 08-05-2002, 11:44 AM

Thanks for your help guys, i didn't have to buy one after all. I just robbed one off my friend's old ATX case. But now I know for next time. My little bro has found an old AT case he wants to mod.

ECUPirate · 08-05-2002, 11:48 AM

just be careful with those AT psu's... like I said, the brown leads going from the PSU to the front switch are HOT! Don't poke around inside those cases if you don't know what U R doing!

bigben2k · 08-05-2002, 12:31 PM

and if you want an AT switch, I just bought a dozen of them for about $1.00 each.

ambient · 08-05-2002, 03:16 PM

Thanks ECU, I'm acutally cool on the AT switch, I learned the hard way a long time ago

.

BigBen, I have so many AT power supplys and switches I don't know what I don't know what I'm gonna do with all of them.

Thanks to all my friends and family with broken old computers. LOL I'm sure you all have the same problem/perk?

08-02-2002, 02:01 PM	#27
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	That last one used to be available at Radio Scrap, I don't know if it still is (I've got a few!). The SPST means Single Pole Single Toggle. Momentary is an extra feature on those. What you are looking for is a "Normally Open" momentary switch. AC or DC, it doesn't matter: a switch is a switch. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

08-05-2002, 11:02 AM	#30
ECUPirate Hottest Stank of them All Join Date: Mar 2002 Location: Washington, DC area Posts: 533	SPST: aka, single pole single throw... (or toggle) and Ben's right. A switch is a switch. In fact, you could take the two leads going to the switch and momentarily touch them together, and that would work. __________________ Does a radioactive cat have 18 half lifes? --Kenny my pimpin' rig: ...previously poorly cooled... 486DX-2 66mhz @ 75mhz, 4Mb ram, shared, 256Mb hard drive Onboard VGA, watercooled, of course 16-color monitor, labtec speakers, 28kbs USRobotics modem Windows XP (think about it) Maze 3, DDen GF3 block, Eheim 1250, econoline van HC, 1/2" hose w/ 5/8" fittings Comair 172mm fan

08-05-2002, 11:44 AM	#31
ambient Cooling Savant Join Date: Jan 2002 Location: Planet Earth Posts: 312	Thanks for your help guys, i didn't have to buy one after all. I just robbed one off my friend's old ATX case. But now I know for next time. My little bro has found an old AT case he wants to mod. __________________ water cooled 1.4 tbird @ 1580 143x11 vcore 1.88 vio 3.55

08-05-2002, 11:48 AM	#32
ECUPirate Hottest Stank of them All Join Date: Mar 2002 Location: Washington, DC area Posts: 533	just be careful with those AT psu's... like I said, the brown leads going from the PSU to the front switch are HOT! Don't poke around inside those cases if you don't know what U R doing! __________________ Does a radioactive cat have 18 half lifes? --Kenny my pimpin' rig: ...previously poorly cooled... 486DX-2 66mhz @ 75mhz, 4Mb ram, shared, 256Mb hard drive Onboard VGA, watercooled, of course 16-color monitor, labtec speakers, 28kbs USRobotics modem Windows XP (think about it) Maze 3, DDen GF3 block, Eheim 1250, econoline van HC, 1/2" hose w/ 5/8" fittings Comair 172mm fan

08-05-2002, 12:31 PM	#33
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	and if you want an AT switch, I just bought a dozen of them for about $1.00 each. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

08-02-2002, 01:55 PM	#26
airspirit Been /.'d... have you? Join Date: Jul 2002 Location: Moscow, ID Posts: 1,986	Oh, and if my reckoning is correct, you should be able to use an AC switch for this use. The difference in AC is that the polarity resembles a sine wave (oscillates from terminal to terminal) while DC has static polarity. If you connect your leads to the right pins on the switch it should work. Just look at the lead diagram on the back and attach it to the white and black leads (the green is the ground line).

08-02-2002, 02:55 PM	#28
airspirit Been /.'d... have you? Join Date: Jul 2002 Location: Moscow, ID Posts: 1,986	Somebody finally knows what the damned abbreviations mean! I've always wondered ... that might make it easier to remember. And yes, that last switch is available at the Rat Hack as a "125VAC" switch ... it costs 5x as much, though, but its convenient, I suppose.

08-05-2002, 03:16 PM	#34
ambient Cooling Savant Join Date: Jan 2002 Location: Planet Earth Posts: 312	Thanks ECU, I'm acutally cool on the AT switch, I learned the hard way a long time ago . BigBen, I have so many AT power supplys and switches I don't know what I don't know what I'm gonna do with all of them. Thanks to all my friends and family with broken old computers. LOL I'm sure you all have the same problem/perk? __________________ water cooled 1.4 tbird @ 1580 143x11 vcore 1.88 vio 3.55

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