Project Hub /Renewable Energy Power & Sustainability/Smart Solar Inverter Controller/Power Bank Based Linear Regulated DC Power Supply

Beginner

ANALOG / DISCRETE

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Power Bank Based Linear Regulated DC Power Supply

A compact variable DC power supply circuit utilizing a standard power bank and a DC-DC booster module to deliver 1.2V to 37V regulated output.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

LM2596 Step Down DC-DC Buck Converter Rs. 99.00
10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: Battery (generic / unspecified)
Voltage Regulator IC (7805 / LM317 / 1117)
Potentiometer / Trimpot
Capacitors
Custom PCB / PCB Fab
Header Pins / Terminals / Connectors

Browse all components

How It Works

This DIY power supply circuit transforms a standard 5V USB power bank into a versatile, adjustable bench power source capable of delivering a variable DC voltage output ranging from 1.2V to 37V. The system operates in two main stages: voltage boosting and linear regulation. First, the 5V DC output from the power bank is fed into Board1, an XL6009 DC-DC booster module. This switching boost converter steps up the 5V input to a higher intermediate DC voltage that is greater than the maximum desired output. Next, this boosted voltage is routed to IC1, an LM317 3-terminal positive linear voltage regulator. The LM317 regulates the voltage down to the precise level set by the user. By adjusting VR1, a 10-kilo-ohm potentiometer connected to the adjustment pin of the LM317 alongside standard resistors, the output voltage across the output connectors (CON2) can be smoothly varied. Capacitors placed at the input and output stages of the regulator help filter out high-frequency noise and maintain circuit stability, ensuring a clean and steady DC output for testing electronic projects without needing an AC mains outlet.

Why Build This

Provides a portable, battery-operated variable DC power source for testing and troubleshooting electronic circuits on the go without relying on AC wall outlets.

Serves as an excellent hands-on laboratory project for diploma and ITI engineering students to understand the practical integration of switching boost modules and linear voltage regulators.

Offers a cost-effective alternative to commercial bench power supplies for prototyping low-power electronic projects.

Real-World Application

Portable bench power supply for testing electronic circuits, prototyping, and providing reliable variable DC power without needing a direct AC wall outlet.

Skills You'll Learn

DC-DC boost conversion

linear voltage regulation

potentiometer voltage adjustment

DC power supply design

circuit filtering using capacitors

multimeter voltage verification

Safety Precautions

Ensure correct polarity when connecting the power bank and verify output voltages using a multimeter before attaching sensitive electronic circuits.

Technology Tags

DC-DC BOOSTER MODULE

LINEAR VOLTAGE REGULATOR

LM317

XL6009

POWER BANK

PCB DESIGN

POWER SUPPLY

Frequently Asked Questions

Can I use any standard power bank for this project?

Yes, as long as the power bank provides a stable 5V output via a USB connection, it can be used to supply power to the XL6009 booster module.

Why do we need both a boost module and a linear regulator?

The XL6009 DC-DC booster module steps up the 5V from the power bank to a higher voltage, while the LM317 linear regulator provides the clean, precisely adjustable output voltage needed for sensitive electronic testing.

Do I need to write any software or code for this circuit?

No, this is a purely analog hardware project, so no programming or software is required for it to function.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-00370