Re: ATX power supply conversion to lab not working
This site has amazed me with the help I have received for my son's PC PSU to Lab PSU. As I do not possess the knowledge of electronics nor the formulas to understand what actually works, I instead went with the "lets see what does work" theme.
Momaka, I did measure the output leads. 5V rail were very close on both + & - The -12V rail was sitting around -11.45 -11.6 The +12V rail was a little high +13.5 13.87 The reason I did not hook up the +3V rail was due to my son not needing it in his testing. I...
carpj
Member
Last Activity: 10-24-2013, 03:01 PM
Joined: 10-17-2013
Location: Kitchener, Ontario
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Re: ATX power supply conversion to lab not working
Update..... I was finally able to get the power supply working without the floppy drive hookup. I tested several 12V car bulbs until I had 2 that would keep the power on. First single element bulb was soldered to the 12V rail & 2nd single element car bulb was soldered to the 5V rail. I did not intend to use the 3V rail & did not need to attach any resister to it.
Thanks for all your ideas to a Newby...... mission accomplished!
Here is the finished result.
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Re: ATX power supply conversion to lab not working
momaka,
Yes a bulge in a cap would spell the end of that cap. The cap your looking at in the pic with the white wire above it is fine. If you zoom in to the photo the cap looks perfectly fine.
But I do appreciate the heads up. If the cap were blown I would scrap the PS and just use another one from my stock pile of old PC's.
Gotta Love This Site
JeffLeave a comment:
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Re: ATX power supply conversion to lab not working
mariushm,
I know talking to electrical newbys can be a little frustrating, so I appreciate the effort.
If I use my 10w 10ohm resister on the +5v rail and a 200ohm resister on the +12v rail, do u think this will give continuous power to allow circuit testing on the 3 way posts for +5v -5v +12v & -12v ? And if this will work will these resisters have too much heat inside the case even with the PS fan functioning. Should I just go with 200ohm 3w on both +5v & +12v rails? +3v rail with be unused...Leave a comment:
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Re: ATX power supply conversion to lab not working
mariushm,
Again.... thanks for your input. My PS was free (old PC) and many people are using these power supplies to create a lab power source. The 10w 10 ohm resister was chosen as per an online conversion I found. With lots of different kinds of ATX PS's out there I needed more input for my PS mod.
I do not know anything about plain linear PS. Just trying to create a Lab PS for my son's mechanical electrical engineering technician collage course he just started.
My 10W 10 ohm resister...Leave a comment:
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Re: ATX power supply conversion to lab not working
Hi mariushm,
Thanks for the input. I guess I have to duplicate the power being used by the floppy drive. Can I use a 10w 10olm for +5v and what would u recommend for the 12v ? What about lamps? Any idea how I might get these to work?
PS the things I do for my sons education! :PLeave a comment:
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Re: ATX power supply conversion to lab not working
Hi Momaka, I do not think my caps are on the way out. When yellow and black wires are hooked up to floppy drive I can get continuous power to PS fans. Here are the sticker & inside photos. Any insight would be great. On another note.... a 10W 10olm resister with 12v load will run PS for about 90 seconds before cutting out. The resister gets really hot before cut-out. This cut-out does not happen when hooked up to floppy drive.
Thanks Jeff
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Re: ATX power supply conversion to lab not working
Thanks Selldoor for your reply. Can I use a 10w 10olm resister to play the role of a lamp? 2nd... do I hook this lamp to black & red?Leave a comment:
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ATX power supply conversion to lab not working
Any suggestions.....
I have converted a Turbo Link ATX Switching Power Supply with 20 pin connector, Model No: WIN-350PS with AC INPUT 115/230V & DC OUTPUT: 350W to a lab power supply. I joined wires [B]black gnd [/B][COLOR="Red"]red +5v[/COLOR] white -5v [COLOR="Yellow"]yellow +12v [/COLOR][COLOR="Blue"]blue -12v[/COLOR] [COLOR="DarkOrange"]orange +3v[/COLOR]. Installed green wire to switch to gnd. Placed 10w 10o on red & black wires to use up power as per online instructions. I also wired in LED grey to black with resister.
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Re: New Members - please post your introductions here
I am also looking for help with converting an ATX power supply into a lab power supply for my sons breadboard assignments. Any help would save me a lot of pain!
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Re: New Members - please post your introductions here
Hello from Canada!
My son has just started his engineering course and I thought I would get some knowledge too!
JeffLeave a comment:
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