box to measure voltages in a power supply

M

Mario

Guest
Hello,

I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.

refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html

In the box there will be the appropriate connector to to connect the
pc power supply to be tested

I will have a digital display to show the voltage measured.

Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?

I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.

Is this ok ? can I do this ? any better solution ?

voltage range goes from -13VDC up to +13VDC

can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.

Please tell me the best solution that you recommend me.

Thanks for your advice,

Mario
 
Mario wrote:
Hello,

I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.

refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html

In the box there will be the appropriate connector to to connect the
pc power supply to be tested

I will have a digital display to show the voltage measured.

Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?

I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.

Is this ok ? can I do this ? any better solution ?

voltage range goes from -13VDC up to +13VDC

can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.

Please tell me the best solution that you recommend me.

Thanks for your advice,

Mario
Click to expand...
"Auto Ranging Digital Panel Meter"
 
Jacks to connect a DMM to the sense terminals.
"Mario" <mandm@flashnet.it> wrote in message
news:9ae829af.0404180326.46cfb8f4@posting.google.com...
Hello,

I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.

refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html

In the box there will be the appropriate connector to to connect the
pc power supply to be tested

I will have a digital display to show the voltage measured.

Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?

I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.

Is this ok ? can I do this ? any better solution ?

voltage range goes from -13VDC up to +13VDC

can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.

Please tell me the best solution that you recommend me.

Thanks for your advice,

Mario
Click to expand...
 
Fred Bloggs <nospam@nospam.com> writes:

Mario wrote:
Hello,
I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.
refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html
In the box there will be the appropriate connector to to connect the
pc power supply to be tested
I will have a digital display to show the voltage measured.
Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?
I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.
Is this ok ? can I do this ? any better solution ?
voltage range goes from -13VDC up to +13VDC
can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.
Please tell me the best solution that you recommend me.
Thanks for your advice,
Mario

"Auto Ranging Digital Panel Meter"
Click to expand...
Doesn't even need to be autoranging for a PC power supply if you already
have a switch to select the input. Places like Jameco, Marlin P. Jones, etc.
have inexpensive digital panel meters.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
 
Sam Goldwasser wrote:
Fred Bloggs <nospam@nospam.com> writes:


Mario wrote:

Hello,
I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.
refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html
In the box there will be the appropriate connector to to connect the
pc power supply to be tested
I will have a digital display to show the voltage measured.
Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?
I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.
Is this ok ? can I do this ? any better solution ?
voltage range goes from -13VDC up to +13VDC
can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.
Please tell me the best solution that you recommend me.
Thanks for your advice,
Mario

"Auto Ranging Digital Panel Meter"


Doesn't even need to be autoranging for a PC power supply if you already
have a switch to select the input. Places like Jameco, Marlin P. Jones, etc.
have inexpensive digital panel meters.

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
Click to expand...
I've been through these fussy things before- even autopolarity is
considered an extra. This one will work, fix jumper on VDC 20V.
http://www.mpja.com/productview.asp?product=14505+ME -hopefully this
means +/-20V.
 
Mario wrote:
Hello,

I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.
Click to expand...
Will the unit under test be connected to a computer while being tested?
If not, is it necessary to make these readings while the supply is under
some load?

You will need to connect a minimum load to the supply under test as they
typically do not operate properly (or at all IIRC) unloaded.

On the other hand, if you need to make these measurements while powering
a system, most modern motherboards have on-board voltage (and
temperature and fan RPM sensing). A simple application can provide this
data on screen. It may not be as precise as a good panel meter, but you
didn't specify the precision you needed.


--
Paul Hovnanian mailto:paul@Hovnanian.com
note to spammers: a Washington State resident
------------------------------------------------------------------
Relax, its only ones and zeros!
 
Fred Bloggs <nospam@nospam.com> writes:

I've been through these fussy things before- even autopolarity is
considered an extra. This one will work, fix jumper on VDC 20V.
http://www.mpja.com/productview.asp?product=14505+ME -hopefully this
means +/-20V.
Click to expand...
Yes. I've used similar meters and they work well enough, if not quite
as stable as something costing 10 times as much. :)

--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: The email address in this message header may no longer work. To
contact me, please use the feedback form on the S.E.R FAQ Web sites.
 
"Sam Goldwasser" <sam@saul.cis.upenn.edu> wrote in message
news:6wn059jwya.fsf@saul.cis.upenn.edu...
|
| Doesn't even need to be autoranging for a PC power supply if you
already
| have a switch to select the input. Places like Jameco, Marlin P.
Jones, etc.
| have inexpensive digital panel meters.
|
| --- sam | Sci.Electronics.Repair FAQ Home Page:
http://www.repairfaq.org/
| Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
| +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| | Mirror Site Info:
http://www.repairfaq.org/REPAIR/F_mirror.html
|
| Important: The email address in this message header may no longer
work. To
| contact me, please use the feedback form on the S.E.R FAQ Web sites.
|
|

Fuck me sideways.....

Sam Goldwasser.

Fuck me.

DNA
 
On 18 Apr 2004 08:24:13 -0400, Sam Goldwasser <sam@saul.cis.upenn.edu>
Gave us:

Fred Bloggs <nospam@nospam.com> writes:

Mario wrote:
Hello,
I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.
refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html
In the box there will be the appropriate connector to to connect the
pc power supply to be tested
I will have a digital display to show the voltage measured.
Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?
I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.
Is this ok ? can I do this ? any better solution ?
voltage range goes from -13VDC up to +13VDC
can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.
Please tell me the best solution that you recommend me.
Thanks for your advice,
Mario

"Auto Ranging Digital Panel Meter"

Doesn't even need to be autoranging for a PC power supply if you already
have a switch to select the input. Places like Jameco, Marlin P. Jones, etc.
have inexpensive digital panel meters.
Click to expand...
If it is for a PC, there are several single half height slot devices
which do this, and even give thermal readings as well.

Why try to re-invent the PC supply monitor? They are already out
there.
 
On Mon, 19 Apr 2004 04:14:58 +0100, "Genome" <Genome@nothere.com> Gave
us:


Fuck me sideways.....

Sam Goldwasser.

Fuck me.

DNA
Click to expand...
What an immature little twit you are.
 
DarkMatter wrote:
On 18 Apr 2004 08:24:13 -0400, Sam Goldwasser <sam@saul.cis.upenn.edu
Gave us:


Fred Bloggs <nospam@nospam.com> writes:


Mario wrote:

Hello,
I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.
refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html
In the box there will be the appropriate connector to to connect the
pc power supply to be tested
I will have a digital display to show the voltage measured.
Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?
I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.
Is this ok ? can I do this ? any better solution ?
voltage range goes from -13VDC up to +13VDC
can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.
Please tell me the best solution that you recommend me.
Thanks for your advice,
Mario

"Auto Ranging Digital Panel Meter"

Doesn't even need to be autoranging for a PC power supply if you already
have a switch to select the input. Places like Jameco, Marlin P. Jones, etc.
have inexpensive digital panel meters.



If it is for a PC, there are several single half height slot devices
which do this, and even give thermal readings as well.

Why try to re-invent the PC supply monitor? They are already out
there.
Click to expand...
It is not for a fixed PC- it is for PC repair shop- a $10 test rig.
 
On Tue, 20 Apr 2004 13:32:36 GMT, Fred Bloggs <nospam@nospam.com> Gave
us:


If it is for a PC, there are several single half height slot devices
which do this, and even give thermal readings as well.

Why try to re-invent the PC supply monitor? They are already out
there.

It is not for a fixed PC- it is for PC repair shop- a $10 test rig.
Click to expand...
And the price of the half height slot device is still likely cheaper
and more accurate than piecing one together.
 
in article 9ae829af.0404180326.46cfb8f4@posting.google.com, Mario at
mandm@flashnet.it wrote on 4/18/04 06:26:

Hello,

I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.

refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html

In the box there will be the appropriate connector to to connect the
pc power supply to be tested

I will have a digital display to show the voltage measured.

Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?

Yes. try
Click to expand...
http://www.redlion.net/Products/DigitalandAnalog/DigitalPanelMeters/PAXLVD.h
tml
Rig your switch to reverse the + and - for negative supplies.

Dave Cole

I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.

Is this ok ? can I do this ? any better solution ?

voltage range goes from -13VDC up to +13VDC

can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.

Please tell me the best solution that you recommend me.

Thanks for your advice,

Mario
Click to expand...
 
"DarkMatter" <DarkMatter@thebarattheendoftheuniverse.org> wrote in message
news:0rbi80hmfa3vqs34p36qiile81oudt7h9l@4ax.com...
On Tue, 20 Apr 2004 13:32:36 GMT, Fred Bloggs <nospam@nospam.com> Gave
us:


If it is for a PC, there are several single half height slot devices
which do this, and even give thermal readings as well.

Why try to re-invent the PC supply monitor? They are already out
there.

It is not for a fixed PC- it is for PC repair shop- a $10 test rig.

And the price of the half height slot device is still likely cheaper
and more accurate than piecing one together.
Click to expand...
But you still need a load, the slot device likely relies on the motherboard
and such to load the PSU. I use some 12v automotive lightbulbs and measure
the voltages with a DMM.
 
"Dave Cole" <davidwcole@earthlink.net> wrote in message
news:BCAF8CC6.6AD4%davidwcole@earthlink.net...
in article 9ae829af.0404180326.46cfb8f4@posting.google.com, Mario at
mandm@flashnet.it wrote on 4/18/04 06:26:

Hello,

I want to build a box to which i can connect a PC power supply
connector and by switching knobs in the box i can measure if the
correct voltage output is in each of the power supply pins.

refer to as power supply pin out:
http://www.hardwaresite.net/faqpowersupply.html

In the box there will be the appropriate connector to to connect the
pc power supply to be tested

I will have a digital display to show the voltage measured.

Question: this voltage digital displays exist ready to measure
voltage? i mean without need of any IC? just plug the to points to
measure voltage in between? do they exist? what are they called? if
not exist what is the easiest solution ?

Yes. try

http://www.redlion.net/Products/DigitalandAnalog/DigitalPanelMeters/PAXLVD.h
tml
Rig your switch to reverse the + and - for negative supplies.

Dave Cole

I want to have a digital display and a knob, by switching the knob i
select each pin of the power supply to be measured.

Is this ok ? can I do this ? any better solution ?

voltage range goes from -13VDC up to +13VDC

can I use only one digital display ? please tell me your
recommendation. I do know want by hand to measure each pin with a
voltmeter.

Please tell me the best solution that you recommend me.

Thanks for your advice,

Mario
Click to expand...

Look at the digital panel meter at
http://www.mpja.com/productview.asp?product=14505+ME
It's ranges are selectable by jumpers, and accepts either 5V (may share
common ground with voltage being measured) or 9V (must be isolated from the
coltage being measured) for its own power.
Of course, you know that you must supply a minimum load to the main output
of your PC supply (+5V or +3.3 V). And to properly test the PC supply, you
should load all the outputs with resistors or other load having suitable
power capacity. Since PC supplies come in many flavors of wattages and
output voltages, your load switching arrangement needs to handle a wide
range of voltages and currents. Use Ohm's law to determine the values and
sizes or load resistors you need.
Cheers!!!
--
Dave M

Good judgement comes from experience, and a lot of that comes from bad
judgement.
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top