Introduction: Variable Voltage and Current Power Supply

About: Diy and gadgets

Check the above video for all the steps.

Homemade power supply, ideal for testing leds, motors and other electronics.

List of material used:

- Dual Meter Here or Here

- DC module

- 10K precision potentiometer Here or Here


- Normal 10k Potentiometer

Step 1: ​Prepare the Case

In this project i´m going to use a plastic container, cut 2 tipes of wood for the sides of the case and glue then together, use small wood pieces to secure them to the case.

Step 2: Drill the Holes

Mark and cut the case to fit all the parts.

Step 3: Wiring

Just follow the schematic, in fact its very easy,just need to remove the small blue potentiometers from the module and reconect the wires to the bigger potentiometers, solder all the remaining components, put all the components inside the case and its nearly done.

Using the schematic:

1º-Power the DC Step-Down module using a transformer from 4 to 30 volt, connect the amp meter to the source "in" 2º-The yellow wire is pluged to the "out" positive side of the buck converter 3º-The remaining bigger black wire is conected to the "out" negative side, the the red is the output negative

Step 4: New Arrival !

While i was finishing this project i received 2 new precision potentiometers, you can use the normal ones but the with the precision potentiometers you have more precision to select the values that you want.

I cut the first and forth cable from the module and use only the other 2 cables for each potentiometer.

Step 5: Time to Test

A nice and easy project to do, i´m going to use it for simple electronic tests.

Tank you for watching ;)

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