In this video, I show you how to build your own adjustable DC power supply using an XL4015 step-down module and a custom 3D printed case.
This compact DIY power supply allows you to precisely control both output voltage and current, making it perfect for electronics projects, circuit testing, and lab use.
🔧 Key Features:
• Adjustable output voltage: 0–24V
• Adjustable output current: up to 5A (XL4015 module)
• Built-in digital voltmeter display
• Compact and clean 3D printed enclosure
• Easy to build and customize
📏 Dimensions:
• 85 × 46 × 44 mm (Compact and portable design)
🎛 Smart Knob Design:
Instead of replacing the potentiometer, I designed a custom external knob that works directly with the module’s original potentiometer.
This allows smooth and precise control without modifying the module.
📐 Wiring Diagram:
A complete wiring diagram is included in the video to guide you step by step.
🖨 3D Print Files:
Download the case files from MakerWorld:
https://makerworld.com/en/models/2649321-3d-printed-adjustable-power-supply-case-xl4015#profileId-2928649
💡 Components used:
• XL4015 DC-DC Step-down module (Voltage & Current control, up to 5A)
https://s.click.aliexpress.com/e/_c3N9l3vF
https://s.click.aliexpress.com/e/_c3rxCjBP
https://s.click.aliexpress.com/e/_c3s0sIR3
• Digital voltmeter
https://s.click.aliexpress.com/e/_c4XNiuE1
https://s.click.aliexpress.com/e/_c4l1qzAH
• DC power connector 2.1×5.5
https://s.click.aliexpress.com/e/_c3Efd6AZ
• Rocker switch
https://s.click.aliexpress.com/e/_c3Pmjyb7
https://s.click.aliexpress.com/e/_c2z9uwBj
• Banana terminals
https://s.click.aliexpress.com/e/_c34d1pwd
https://s.click.aliexpress.com/e/_c4cDhULL
• 3D printed enclosure
⸻
⚡ This is a compact, powerful, and practical DIY power supply combining electronics and 3D printing.
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