Introduction: Handy Power Supply

About: My Chinese name is 許英豪. My background is Electronic and software engineering. I have over 30 years design experience on the SmartPhone, Tablet and Digital camera. I love DIY!

If you find my design interesting, you could make a small donation:

This is a small size power supply with low cost and easy to make that only taking about 5 more hours. I was very happy with it and would share with you.

Power Supply Specifications

Input: 5v-16v/3A DC

Output: 1.3V - 15.5V/2 Amps

Step 1: Materials and Tools

Here is a list of materials and tools I used for this project.


2 x LM2596S DC-DC module link

2 x Voltage/Current DC0-100V LED meter link

2 x WXD3-13-2W-10K link

2 x D3-13-2W knob link

2 x 4MM banana jacks(Red + Black) link

2 x 4MM banana sockets(Red + Black) link

1 x switch 117S 8.5*13.5MM link

1 x Power Jack DC-022 DC 5.5mm 2.1mm link

1 x AMS1117-5V link

1 x 5V 30mm fan link

6 x 2.5mm/6mm screw

1 x DC adapter 16v / 3A, the voltage range between in 9v~16v would be better.


3D printer with PLA withe & gray color

Soldering iron

Step 2: Make the Enclosure by 3D Printer

Download the STL file from here

And take about 2 hours to print them.

I have removed the USB slot which the 2 holes on the front panel, the new one will not be any hole on it.

Step 3: Modify the DC-DC Converter

take away the small one of potentiometer which is on the DC-DC module, and replace the big one of potentiometer which shown in the picture. The picture 1 is not correct, please follow the number 3-3, 2-2, 1-1 to connect together as picture 2.

Step 4: Schematic and Diagrams

Refer to the diagram to connect all of parts together

Step 5: Assembler

put all of parts into this enclosure, and use the tape to protect the boards and wires to prevent any short circuit.

Step 6: Testing

Plug in the 16V DC adapter , and switch on.

Tune the voltage and measure by multimeter to see the result.

That's all and have fun.

Step 7: Start Working

I use it with my Spider Robot control board to do some experiment about MQ-2/MQ-135 air sensors.

It works fine.

If you are interested more about my projects, here is my bolg