Introduction: DIY Bench Power Supply (Dual-Channel)

Every electronic hobbyist needs a variable power supply for prototyping and testing, but they can be very expensive. I will show you how to build a cheap yet reliable power supply.

Step 1: ​The Parts List:

The Parts List:

To build this specific power supply, you will need the following:

> 1x Switching Power Supply ( Max 32 Volts - Min 2 Amps)

> 2x LM2596 DC-DC Buck Converter

> 2x 10k potentiometers + Knobs

> 4x Female Banana connectors

> 2x Toggle Switches

> 1x Car Amplifier Enclosure Box

> 1x 16*2 Dual LCD Multimeter

You can build your own Dual LCD Multimeter following this guide

> USB Port (Optional)

Tools Required:

>Dremel and cutting disk

>Silicone glue

>Soldering iron

Step 2: The Beginning

>I started by fixing SMPS onto the PCB, which was then screwed onto the Enclosure Box.

>Applied Thermal Paste b/w Heatsink & Aluminum Enclosure Box.

>Then I made Multimeter from this guide and also fixed it to the enclosure box.

Edit: Circuit Diagram + PCB layout + Hex Code also have been attached.

Step 3: Modifying Front & Back Panels

>Using Dremel I was able to cutout space for LCD & Silicon glue was used to stick LCD with front panel.

>Using Drill Machine I made holes for Potentiometer & Toggle switches.

>Next wires from external potentiometers were soldered on to the boost converters.

>Voltmeter & Ammeter are connected to the outputs of boost converter.

>Heatsinks are installed onto the boost converter, also don't forget to apply thermal paste.

Step 4: Testing

>I have tested the bench power supply on variety of loads & so far there has been no problem.

>Final cost of this project was about 2000Rs which approximately equals to 18$.

>I hope this guide was helpful, let me know if you have any questions.

Comments

author

YOU DON'T SHOWED NOTHING SPECIFIC MY FRIEND, EVEN NO ELECTRONIC DIAGRAM FOR THE BEGINNERS NOR THE CIRCUIT POWER SOURCE. BE MORE SPECIFIC....

author
Jcboff (author)2016-08-09

This instructable is very lacking in detail.

author
totomoto (author)2016-05-24

Great job

author
Nizzle321 (author)2016-05-10

Can you include some specs? Since you are using a specific switching mode power supply, the max current handling should be published. But if your power supply sources current through the buck converters, maybe it is limited?

I like your project though. Good job.

author
supernova432 (author)Nizzle3212016-05-12

>Output of the boost converter depends upon the input provided by SMPS.

>The maximum output ratings of LM2596 is 1.1-30 Volts 3 Amps.

>If your SMPS is rated at 32 Volts 6 Amps - then each buck converter can provide 1.1-30 Volts 3 Amps as output.

author
jimofoz (author)2016-05-10

Looks good, but what kind of specs (voltage/current) does it have?

author
supernova432 (author)jimofoz2016-05-12

>Output of the boost converter depends upon the input provided by SMPS.

>The maximum output ratings of LM2596 is 1.1-30 Volts 3 Amps.

>If your SMPS is rated at 32 Volts 6 Amps - then each buck converter can provide 1.1-30 Volts 3 Amps as output.

author
supernova432 (author)2016-05-12

Link is working for me, but in any case I have also attached (Circuit Diagram + PCB layout + Hex Code) for the dual multimeter.

author
Nizzle321 (author)2016-05-10

Anyone wondering what that .Lay file is, it's a PCB fabrication file. I downloaded a free reader by Abacom for their Sprint-Layout software so I could view it. Found here: http://www.abacom-online.de/uk/html/sprint-layout.html all the way at the bottom. You can print from it so making the PCB shouldn't be a problem. I'm not sure if there are other PCB Design software packages that read .lay files...

author
JosephL91 (author)2016-05-10

We need a schematic. Thank you.

author
RafaB6 (author)2016-05-10

Pls. schematics, almost circuit wiring!!!

author
Infernoxan (author)2016-05-05

Where can I get the SMPS?

author
hazza_ob (author)Infernoxan2016-05-08

ebayyyy

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rrvau (author)2016-05-06

How about a circuit diagramme?

Thankyou in advance

author
DinoD5 (author)2016-05-06

Nice job! I'd like to build one of these, but the links to the other projects don't seem to be working?

author
xAbdulRhman (author)2016-05-05

Thanks, Very awesome BPS

thanks for sharing I may build it but not now I have final exams to study for :\

author
wold630 (author)2016-05-05

Thanks for sharing this!