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Science Forum Index » Electronics - Basics Forum » 3 in 1 toggle switch?...
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| DFWguy... |
 Posted: Thu May 15, 2008 5:15 pm |
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Looking to do the following:
I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
TIA!  |
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| Wim Lewis... |
| Posted: Thu May 15, 2008 5:15 pm |
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In article <fC2Xj.7692$0h.3489 at (no spam) trnddc02>, DFWguy <aol at (no spam) aol.com> wrote:
Quote: I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
What you're looking for is a three-pole or "3PST" switch. (ST = single throw,
since you don't need multiple switch positions --- if you were switching
between two drives, e.g., you'd want a 3PDT (double throw) switch).
However, I'm dubious that the multi-Gbps SATA data will make it through
a run-of-the-mill switch intact, and I don't know whether it's safe to
disconnect the SATA drive's power without disconnecting the data lines.
(Actually I suspect it might be safe but don't blame me if you try it and
fry something.)
--
Wim Lewis <wiml at (no spam) hhhh.org>, Seattle, WA, USA. PGP keyID 27F772C1 |
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| Rich Grise... |
| Posted: Thu May 15, 2008 5:35 pm |
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On Thu, 15 May 2008 22:15:39 +0000, DFWguy wrote:
Quote: Looking to do the following:
I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
Google for "triple-throw toggle switch" - try it with and without the
quotes.
Good Luck!
Rich |
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| DFWguy... |
| Posted: Thu May 15, 2008 5:39 pm |
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Rich Grise wrote:
Quote: On Thu, 15 May 2008 22:15:39 +0000, DFWguy wrote:
Looking to do the following:
I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
Google for "triple-throw toggle switch" - try it with and without the
quotes.
Good Luck!
Rich
That sounds like the ticket. Off to Radio Shack. Thx! |
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| DFWguy... |
| Posted: Thu May 15, 2008 7:12 pm |
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Wim Lewis wrote:
Quote: In article <fC2Xj.7692$0h.3489 at (no spam) trnddc02>, DFWguy <aol at (no spam) aol.com> wrote:
I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
What you're looking for is a three-pole or "3PST" switch. (ST = single throw,
since you don't need multiple switch positions --- if you were switching
between two drives, e.g., you'd want a 3PDT (double throw) switch).
However, I'm dubious that the multi-Gbps SATA data will make it through
a run-of-the-mill switch intact, and I don't know whether it's safe to
disconnect the SATA drive's power without disconnecting the data lines.
The data isn't going thru the switch - only the juice. And as far as
leaving the data lines intact - I've done the same thing for a long time
on my IDE drive with no issues. No juice = no problems.
Quote: (Actually I suspect it might be safe but don't blame me if you try it and
fry something.)
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| John Fields... |
| Posted: Thu May 15, 2008 7:16 pm |
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On Thu, 15 May 2008 22:15:39 GMT, DFWguy <aol at (no spam) aol.com> wrote:
Quote: Looking to do the following:
I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
---
There may be, but it seems to me that what you're looking for is a
three-pole three position rotary switch which cuts out the different
drives sequentially, one at a time, while leaving the other two
operational.
Am I right?
JF |
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| Peter Bennett... |
| Posted: Thu May 15, 2008 7:16 pm |
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On Thu, 15 May 2008 22:39:34 GMT, DFWguy <aol at (no spam) aol.com> wrote:
Quote: Rich Grise wrote:
On Thu, 15 May 2008 22:15:39 +0000, DFWguy wrote:
Looking to do the following:
I have a SATA drive I want to be able to disable the power to on
occasion. Long and short, 3 wires and 3 voltages that I want to be able
to cut off via a switch (don't wanna have to open up my rig and just
physically disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about
doing this? Is there a "3 in 1" type toggle available that I'm missing?
Google for "triple-throw toggle switch" - try it with and without the
quotes.
That should be a "triple-pole" or "three circuit" switch.
Triple-throw toggle switches are generally made from unobtainium, so
may be hard to locate.
Quote:
Good Luck!
Rich
That sounds like the ticket. Off to Radio Shack. Thx!
--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca |
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| Tam... |
| Posted: Thu May 15, 2008 8:06 pm |
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"DFWguy" <aol at (no spam) aol.com> wrote in message news:fC2Xj.7692$0h.3489 at (no spam) trnddc02...
Quote: Looking to do the following:
I have a SATA drive I want to be able to disable the power to on occasion.
Long and short, 3 wires and 3 voltages that I want to be able to cut off
via a switch (don't wanna have to open up my rig and just physically
disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about doing
this? Is there a "3 in 1" type toggle available that I'm missing?
TIA!
If you want a switch at each drive to turn it OFF/ON you need a 3 pole
single throw (3PST) switch. You can get such from Digikey and Mouser (Look
up Alcoswitch). You don't need to disconnect ground; so if you just have +5
and +12V you only need a 2PST switch. There will be dozens like that
available, but one that costs $2 to $3 should be about right. Radio Shack
will have the 2PST, but probably not the 3PST.
If you want 1 switch to enable 1 of 2 drives, you need a 3P2T or 2P2T.
Again, radio Shack will have the 2P.
Any of these will look like a regular toggle switch with extra pins on the
back.
Tam |
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| Tom Biasi... |
| Posted: Fri May 16, 2008 6:00 am |
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"DFWguy" <aol at (no spam) aol.com> wrote in message news:fC2Xj.7692$0h.3489 at (no spam) trnddc02...
Quote: Looking to do the following:
I have a SATA drive I want to be able to disable the power to on occasion.
Long and short, 3 wires and 3 voltages that I want to be able to cut off
via a switch (don't wanna have to open up my rig and just physically
disconnect the power supply).
v1 ----- switch ------- drive v1
v2 ----- switch ------- drive v2
v3 ----- switch ------- drive v2
Short of installing 3 different simple toggles, how could I go about doing
this? Is there a "3 in 1" type toggle available that I'm missing?
TIA! +
Not a good idea to just let the drive crash.
Tom |
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| Clint Sharp... |
| Posted: Sat May 17, 2008 3:19 pm |
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In message <cYqdndlT493F9LDVnZ2dnUVZ_qPinZ2d at (no spam) giganews.com>, Tom Biasi
<tombiasi at (no spam) optonline.net> writes
Quote: Not a good idea to just let the drive crash.
Tom
Drives don't 'crash' anymore because they autopark nowadays.
--
Clint Sharp |
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| Tom Biasi... |
| Posted: Sat May 17, 2008 3:29 pm |
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"Clint Sharp" <clint at (no spam) clintsmc.demon.co.uk> wrote in message
news:+F4wslWX3zLIFwUZ at (no spam) clintsmc.demon.co.uk...
Quote: In message <cYqdndlT493F9LDVnZ2dnUVZ_qPinZ2d at (no spam) giganews.com>, Tom Biasi
tombiasi at (no spam) optonline.net> writes
Not a good idea to just let the drive crash.
Tom
Drives don't 'crash' anymore because they autopark nowadays.
--
Clint Sharp
They do have an autopark feature but killing the power abruptly can still
cause a crash. Less likely than years ago but still can happen. I see them.
Tom |
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| Clint Sharp... |
| Posted: Sat May 17, 2008 6:13 pm |
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In message <YKudnRXGV7Cj3bLVnZ2dnUVZ_trinZ2d at (no spam) giganews.com>, Tom Biasi
<tombiasi at (no spam) optonline.net> writes
Quote: They do have an autopark feature but killing the power abruptly can still
cause a crash. Less likely than years ago but still can happen. I see them.
Do tell, the auto park I have seen is not an electronic feature, it's
mechanical so sudden power outage shouldn't cause a crash, I'd be
interested if this isn't always the case.
--
Clint Sharp |
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| whit3rd... |
| Posted: Sun May 18, 2008 7:54 am |
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On May 15, 3:15 pm, DFWguy <a... at (no spam) aol.com> wrote:
Quote: I have a SATA drive I want to be able to disable the power
Short of installing 3 different simple toggles, how could I go about
doing this?
The normal way to accomplish this is to use removable
disk drive bays; look for "mobile rack" for a commonly
available brand of these. Power switching and sequencing
and even hotswap capability are available, anywhere
computer case components are sold. |
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