A good, inexpensive PS I''ve found
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Posts: 46,084
Isn't it true that you always need some load on computer power supplies to
work/regulate.
Seem to me I read something about this in N&V some time back.
Also how would you regulate/limit the current so not to blow anything or in
my case blind by the light when (not if) I short something out. Just can't
trust us mech types with electricity/
Original Message
From: John Boyles [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=qDY7V5YI3uqnHy5uScwr_DXSI8DMceEtkgGNp7TbNnikqmn2UUMsGnfnNBdUEQ-QGbBCFyd1s-swtQTz]jjghost@t...[/url
Sent: Monday, May 12, 2003 1:39 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] A good, inexpensive PS I've found
I've noticed a few questions on here about power supplies and thought I'd
share an inexpensive solution that I've found works well for me. I built a
supply for my own use around a PS taken from an old AT (Pentium or older)
computer. The AT supply is a switch-mode supply that easily provides me
with a very well regulated high current +5v (~20A, red), +12v (~5A, yellow),
and lower current -5v (white), -12v (blue). Blacks are ground. Usually
there's a sticker on top of the supply with exact current ratings. You can
get other voltages between +12 and -12 with the addition of a simple
regulator. I wouldn't recommend it for applications requiring very large
amounts of power, but it works well for electronics work.
They retail for about $30 (last I checked) but many times you can just pull
one out of an old PC you've got lying around. Just be careful when working
with the power switch on an AT supply. Remember that it's switching both
sides of 120 RMS VAC across its DPDT contacts so use caution when connecting
the four wires! (I've got an AT switch with a black scorch mark to prove
the point). Also, note that even though the supply has a grounding wire,
the chassis still needs to be separately grounded.
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[noparse][[/noparse]Non-text portions of this message have been removed]
work/regulate.
Seem to me I read something about this in N&V some time back.
Also how would you regulate/limit the current so not to blow anything or in
my case blind by the light when (not if) I short something out. Just can't
trust us mech types with electricity/
Original Message
From: John Boyles [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=qDY7V5YI3uqnHy5uScwr_DXSI8DMceEtkgGNp7TbNnikqmn2UUMsGnfnNBdUEQ-QGbBCFyd1s-swtQTz]jjghost@t...[/url
Sent: Monday, May 12, 2003 1:39 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] A good, inexpensive PS I've found
I've noticed a few questions on here about power supplies and thought I'd
share an inexpensive solution that I've found works well for me. I built a
supply for my own use around a PS taken from an old AT (Pentium or older)
computer. The AT supply is a switch-mode supply that easily provides me
with a very well regulated high current +5v (~20A, red), +12v (~5A, yellow),
and lower current -5v (white), -12v (blue). Blacks are ground. Usually
there's a sticker on top of the supply with exact current ratings. You can
get other voltages between +12 and -12 with the addition of a simple
regulator. I wouldn't recommend it for applications requiring very large
amounts of power, but it works well for electronics work.
They retail for about $30 (last I checked) but many times you can just pull
one out of an old PC you've got lying around. Just be careful when working
with the power switch on an AT supply. Remember that it's switching both
sides of 120 RMS VAC across its DPDT contacts so use caution when connecting
the four wires! (I've got an AT switch with a black scorch mark to prove
the point). Also, note that even though the supply has a grounding wire,
the chassis still needs to be separately grounded.
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
[noparse][[/noparse]Non-text portions of this message have been removed]