DIY Bench Power Supply With Old Computer SMPS

Hey! everyone My name is Steve .

Today i'm going to show you How to make a Bench Power Supply With Computer Power Supply

Bench Power supply is very useful in electronics field it is very easy to make it with a regular ATX power supply

Click Here to See The Video

Let's Start

Supply Output

• 3.3 V @ 30A
• 5 V @ 25A
• 12 V @ 10 A

it's my specification all it's depend upon your power supply power output

Additional

• Green Led ( power indicator )
• Toggle Switch (On/Off)

Safety Features

• Short circuit Protection
• Over load Protection
• Over Heat Protection

All this Built in your ATX Power Supply

• SMPS
• Binding post click
• Led with 220ohms resistance
• toggle switch

Open 4 screws from the top ( see the picture )

• Mark the position for drilling with a marker ( see the picture )
• First Drill with small drill bit and then go for bigger
• Drill total 8 holes ,6 for binding post , 1 for led , 1 for switch

• First start with installing the binding post ( see the picture )
• then install the led
• and then install the switch

• First cut green and black wire and solder them on the toggle switch ( see the picture )
• And then cut orange and black wire and solder with a 220 ohms resistance on the LED

• Cut 3 Yellow & 3 Black , 3 Red & 3 Black , 3 Orange & 3 Black wire
• Cut the Length to reach all the connection
• Don't cut too small

Remember

• Yellow wire gives you 12 V
• Red wire gives you 5 V
• Orange wire gives you 3.3 V

• Twist the 3 wires and make a bunch ( see the picture )
• Do The same with all the wires
• To make it looks less messy

• Connect those 6 wire to the binding post and tighten the nut ( see the picture )

Connection

• Yellow & Black - Black And Red Terminal of first Group
• Red & Black - Black And Red Terminal of Second Group
• Orange & Black - Black And Red Terminal of Third Group

see the picture for more information

• Trim off the unused wire ( see the picture )

use a cable tie to tie loose wire ( see the picture )

Now close the cabinet and tight 4 screws

Now mark the terminal

• First binding post 12V
• Second binding post 5V
• Third Binding post 3.3V
• Led
• Switch (On/Off)

Click Here to See The Video

You Just Made It

Now just Plug the power and enjoy

Thank you for visiting my Instructables

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