Welcome to my another DIY "Power Supply" project. In this project i'm gonna show you how to make your own power supply with old computer. I have my old pc so, i decided to change it into something new like power supply + 5 volt charger for my workbench. So, let's get started.
Step 1: Circuit Diagram
Here it is the circuit diagram and some information about power supply wires with the help of this we will be able to make our project.
Step 2: Components and Parts
Switches: spst x 2
Resistors: (5 watt 12 ohms x 2) and (1/2 watt 2.2 k x 2)
Led: Red and Green
Female usb port x 2
Drill and Drill bits according to the size
Terminals x 6 (one black for ground and 5 other any color)
5 volt 2amp charger kit
Step 3: Removing All Parts From Old Pc
Remove the all parts from your old computer you don't need anything except power supply and 12 volt fan. Make sure don't waste your removing parts we will use later for another project.
Step 4: Casing and Strips
Now you have computer casing and two strips of floppy drive and CD-ROM drive. Take your floppy drive and CD-ROM drive strips.
Step 5: Measuring and Holes
Take your floppy drive strip and marking on it according to terminal size. I marked for 6 terminals and than hole on it.
Now take your cd-rom strip mark on it according to the voltmeter cut it down into the box shape.
Step 6: Fixing
Fix your all 6 terminals into your floppy drive strip and put a voltmeter into the cd-rom strip. Than its look like this.
Step 7: Disassembling the Front Side of Pc Casing
Take your pc casing and remove the front pannel from it than its look like this.
Step 8: Removing Circuit
Remove the power and reset circuit + usb port from it and than placing it onto the vero board and cut it down according to the same size and build a circuit on it.
Step 9: Making Circuit
Now build your own circuit of on/off for your power supply according to your circuit diagram (1) and make usb port connection according to circuit diagram (2) placing the all components on a both strips and then soldering it.
Step 10: Power Supply Wires
Take a bigger clip of wires and cut the clip you don't need this you need wires only.
Step 11: Installing Parts
Put the all parts back "usb port, floppy drive strip and cd-rom strip" into the casing and make some connection according to circuit diagram (2) with soldering.
Step 12: Connections
Take a small piece of veroboard and soldering two 5 watt 12 ohms resistor into paraller and connect one end with +5 volt and other one is from ground. Joining the wires with voltmeter also connect your 5 volt 2 amp charger with it according to the diagram and soldering it with female usb port.
Make sure you'll soldering the all components accoding to the diagram very carefully.
Step 13: Fan Plugging
Remove the cover from 12 volt fan which one we take it while disassembling the casing parts. Now you'll need to fix it back with computer casing and connection it.
Your power supply is almost ready to use.
Step 14: Voltage Checking
Check the output connections with your meter for your confirmation its working fine. Fix the all components with hot glue very carefully.
Step 15: Finish
Now my DIY power supply is ready to use for my workbench here above on and off conditions of my power supply you also check the voltage reading on voltmeter.
I hope you guys like it
Step 16: Old Power Supply
My old power supply its look like this but now i have my latest power supply.