DIY Bench Power Supply (Dual-Channel)

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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 )

> 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

> 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.

>Multimeter Circuit Diagram + PCB layout + Hex Code 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.

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    17 Discussions

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

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    Jcboff

    2 years ago

    This instructable is very lacking in detail.

    Great job

    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.

    1 reply

    >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.

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

    1 reply

    >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.

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

    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...

    We need a schematic. Thank you.

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    RafaB6

    2 years ago

    Pls. schematics, almost circuit wiring!!!

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    rrvau

    2 years ago

    How about a circuit diagramme?

    Thankyou in advance

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    DinoD5

    2 years ago

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

    Thanks, Very awesome BPS

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

    Thanks for sharing this!