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Benchtop Power supply Vs. Modified Computer PSU power supply

N

none none

Jan 1, 1970
0
What would be the advantages of having a benchtop power supply that was
designed and sold for the purpose of powering breadboard projects over
taking a computer PSU and modifying it so you can tap the 12V and 5V lines
to create a benchtop power supply?
 
J

James Thompson

Jan 1, 1970
0
none none said:
What would be the advantages of having a benchtop power supply that was
designed and sold for the purpose of powering breadboard projects over
taking a computer PSU and modifying it so you can tap the 12V and 5V lines
to create a benchtop power supply?
The switchmode pc supplies work ok if you don't require it to supply high
current pulses. ( as in if you try to power a headlamp or even sometimes a
turn signal lamp, will cause it to shutdown. )
The 5 volt line is not so bad for shutdown's and can handle more brunt
power.
 
H

Homer J Simpson

Jan 1, 1970
0
What would be the advantages of having a benchtop power supply that was
designed and sold for the purpose of powering breadboard projects over
taking a computer PSU and modifying it so you can tap the 12V and 5V lines
to create a benchtop power supply?

You usually need a minimum load on the computer PSU. You may find you have
more noise also.


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P

Phil Allison

Jan 1, 1970
0
"none none"
What would be the advantages of having a benchtop power supply that was
designed and sold for the purpose of powering breadboard projects over
taking a computer PSU and modifying it so you can tap the 12V and 5V lines
to create a benchtop power supply?


** Same advantages as using a small spade in the garden instead of a
bulldozer.




........ Phil
 
S

Stanislaw Flatto

Jan 1, 1970
0
none said:
What would be the advantages of having a benchtop power supply that was
designed and sold for the purpose of powering breadboard projects over
taking a computer PSU and modifying it so you can tap the 12V and 5V lines
to create a benchtop power supply?
One less piece of equipment to suspect when things don't behave.
On bench worth its weight in diamonds.

HTH

Stanislaw.
 
J

jasen

Jan 1, 1970
0
What would be the advantages of having a benchtop power supply that was
designed and sold for the purpose of powering breadboard projects over
taking a computer PSU and modifying it so you can tap the 12V and 5V lines
to create a benchtop power supply?

their behavior when short cuitcuited.

a 20A short sircuit will burn the tracks of veroboard, and ruin a solderless
breadboard.

the lab supply probably has better no-load regulation too.

if you can't afford a lab supply use a 300ma, regulated wall-wart (or other
apropriate size).


Bye.
Jasen
 
B

Ban

Jan 1, 1970
0
none said:
What would be the advantages of having a benchtop power supply that
was designed and sold for the purpose of powering breadboard projects
over taking a computer PSU and modifying it so you can tap the 12V
and 5V lines to create a benchtop power supply?

A useful Benchtop PS has adjustable voltages(course/fine) and adjustable
current limiters. It usually also has a display for V and I of each output,
which are ground independent. There is no fan noise and regulation is mostly
linear with very little noise and ripple.
None of these features can be achieved with a ATX supply.
 
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