This is a remix of the awesome Lab Power Supply by Chordless. I couldn't find the exact components they used, so I had to adjust the design a little. I also added separate switches for the input and output so you can adjust the voltage or current without the need to disconnect your electronics.

Here's the list of parts I used:

• 1x 5A CC StepDown Board based on XL4015 E1 1.51 EUR
• 1x Mini Digital Voltmeter Ammeter DC 100V 10A 2.33 EUR
• 2x WXD3-12 10kOhm Potentiometer 2.04 EUR
• 1x KCD8 Rocker Double Switch 0.59 EUR
• 1x 2.5mm DC jack 0.14 EUR
• 1x Set of red and black Terminal Connectors 1.06 EUR
• 1x Test Leads 2.70 EUR

This was a very fun project for 10.37 EUR.

For assembly instructions follow Chordless' description and refer to the schematic.

Again many thanks to Chordless for their original design, to Heartman for their Parametric Box and charliearmorycom for their Customizable Knob.