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http://www.instructables.com/id/Bench-Top-Power-Supply/ technology workshop living food play outside Bench Top Power Supply by joshmt2012 on March 14, 2015 Table of Contents Bench Top Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Intro: Bench Top Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Step 1: Identifying Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Step 2: Adding Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Step 3: Drilling holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Step 4: Button everything up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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Bench Top Power Supply

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  • http://www.instructables.com/id/Bench-Top-Power-Supply/

    technology workshop living food play outside

    Bench Top Power Supplyby joshmt2012 on March 14, 2015

    Table of Contents

    Bench Top Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

    Intro: Bench Top Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

    Step 1: Identifying Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

    Step 2: Adding Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

    Step 3: Drilling holes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

    Step 4: Button everything up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

    Related Instructables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

    Advertisements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

    Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

    http://www.instructables.com/tag/type-id/category-technology/http://www.instructables.com/tag/type-id/category-workshop/http://www.instructables.com/tag/type-id/category-living/http://www.instructables.com/tag/type-id/category-food/http://www.instructables.com/tag/type-id/category-play/http://www.instructables.com/tag/type-id/category-outside/http://www.instructables.com/member/joshmt2012/?utm_source=pdf&utm_campaign=title

  • http://www.instructables.com/id/Bench-Top-Power-Supply/

    Author:joshmt2012I am a Junior in college studying Mechanical Engineering. My interests include woodworking, 3D printing, electronics and building computers

    Intro: Bench Top Power SupplyI finally found the time to make my own bench top power supply from and old computer power supply. This has been done many times before and this is my take on it.

    What you need

    Computer Power SupplyScrew driversWire cutter/StrippersRing terminalsSoldering Iron (If your right terminals aren't crimp type)4 screw terminal posts (I made my own, Instructable here)Heat shrink TubingSwitchDrill

    And as always be careful around power supply's. They contain capacitors that can cause serious harm to yourself if not handled properly.

    Step 1: Identifying WiresFor the first step we need to take the case off from around the power supply.

    Now you need to identify the wires

    YELLOW = 12 VoltsRED = 5 VoltsORANGE = 3.3 VoltsBLACK = GroundGreen = Power On

    I cut all the other wires back down to the board and wrapped the ends with black tape to prevent them from accidentally touching anything else.

    I then sorted the yellow, red, orange and black wires into separate groups.

    I set the green wire and one black wire aside for the switch to turn on the power supply.

    file:/member/joshmt2012/file:/member/joshmt2012/http://www.instructables.com/id/3D-Printed-Screw-Post-Terminal/

  • http://www.instructables.com/id/Bench-Top-Power-Supply/

    Step 2: Adding TerminalsNow i selected around 6 wires from each color and trimmed the rest down close to the board and covered with black tape.

    The six wires from each color were then soldered into a ring terminal and then covered with heat shrink tubing.

    The green wire and the one black wire were wired into the switch.

    I then attached my screw post terminals to the ring terminals.

  • http://www.instructables.com/id/Bench-Top-Power-Supply/

  • http://www.instructables.com/id/Bench-Top-Power-Supply/

    Step 3: Drilling holesMark out on your power supply case where you want your terminals and switch to be. (Since my power supply was smaller and more compact I didn't have much choicewhere they would fit)

    Drill out your holes and test fit your terminals and switch.

    Step 4: Button everything upPut your post terminals and switch in there holes and reassemble the case. Now plug in power and test your voltages. You now have a cheap desktop power supply.

    I would of liked to have added an led to signal when the power supply was turned on and this could easily be done with an led in series with a resistor connected to one ofthe voltages.

    Thank you for taking the time to read my instructable, have a nice day!

  • http://www.instructables.com/id/Bench-Top-Power-Supply/

  • http://www.instructables.com/id/Bench-Top-Power-Supply/

    Related Instructables

    ATX PowerSupply -->Cheap Bench-Top PowerSupply (Photos)by RPisces

    ComputerPower Supply toBench PowerSupply Adapterby DIY Hacksand How Tos

    Yet another ATXbench toppower supply bycdesjardins

    ATX to LabBench PowerSupplyConversion bymatthewbeckler

    ComputerPower Supply toLab PowerSupplyConversion V2.0(Photos) byColorBomb

    Variable speedmagnetic stirrerfrom a PCpower supply byM Allahkarami

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    Comments

    11 comments Add Comment

    roberthellier37 says: Mar 17, 2015. 5:51 AM REPLYI like this Idea.... a good way top re cycle old PC PSU.... well done. I will have my PSU in a metal and plasic case for good earthing bond. and put the terminalson an plastic board to prevent any shorting out.... great idea tho

    Orngrimm says: Mar 16, 2015. 2:51 PM REPLYI always connect my green wire (ATX pwr ON) to GND. This is because all my PSU's seem to have a primary-switch i use for powering ON and OFF.

    That said, i wanted to stress out something: NEVER ever EVER (!!) relocate, rewire or mess with this primary-side-switch (Located near the mains-Plug pfthe PSU) except switching it on and off (Intended use).If you want a easy and save means to switch the PSU on and off, you should use the method provided here in this instructable and use a switch to connectthe green to GND (PSU = ON) or leave it unconnected (PSU = OFF).

    EvolvedAwesome says: Mar 15, 2015. 10:03 PM REPLYGreat idea! I will suggest two things though. First, I would love to see this mounted into your desk, that would be awesome! Secondly, I want to warn anyonewho attempts this that capacitors in the PSU can kill if your not careful. Please use the appropriate safety equipment or you could get badly injured or evenkilled!

    nerd7473 says: Mar 15, 2015. 8:29 PM REPLYI don't know if anyone is aware but this project can be deadly due to high-voltage capacitors found in PSUs (power supply units) I hope that those whoattempt this stay safe... and careful

    -sincerely: nerd7473

    daniellozysko says: Mar 15, 2015. 10:34 AM REPLYamazing!

    chelseabun says: Mar 15, 2015. 8:01 AM REPLYYou make a same mistake that I have made in my ATX power supply. It's should have at least 2 ground posts. And you might want to add some filtercapacitors

    joshmt2012 says: Mar 15, 2015. 8:11 AM REPLYMy original plan was to have a ground post for each voltage terminal, but limited space inside only allowed me to have one. Im planning on building mynext one out of a full size atx and add variable voltage to it. Thank you for the suggestions!

    monkeyracing says: Mar 15, 2015. 12:23 AM REPLYCan you describe how you made the posts? That would save me a lot of frustration at my local, poorly stocked supplier. Thanks!

    joshmt2012 says: Mar 15, 2015. 8:09 AM REPLYSorry i forgot to add the link for the instructables on it, here it is http://www.instructables.com/id/3D-Printed-Screw-Post-Terminal/

    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  • http://www.instructables.com/id/Bench-Top-Power-Supply/

    russ_hensel says: Mar 14, 2015. 7:22 PM REPLYJust a note to let you know I have added this instructable to the collection:

    Encyclopedia of ATX to Bench Power Supply Conversion

    >> http://www.instructables.com/id/Encyclopedia-of-A...

    Take a look at about 70 different approaches to this project.

    joshmt2012 says: Mar 14, 2015. 7:29 PM REPLYAwesome! thank you

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