Project Hub /Audio Displays & Interactive Media/Analog Audio & Amplifier Circuits/Simple DIY Wireless Bluetooth Speakers using Audio Amplifier

Beginner

ANALOG / DISCRETE

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

Simple DIY Wireless Bluetooth Speakers using Audio Amplifier

Learn how to build a budget-friendly, portable wireless Bluetooth speaker from scratch using basic electronic components and an acrylic laser-cut enclosure.

Originally published on CircuitDigest

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.

ESP32 WiFi+Bluetooth CP2102 Development Board Rs. 858.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
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

We don't carry yet: Speaker / Audio Amplifier
LiPo Battery
Battery Charger Module TP4056
Laser / LiDAR / ToF Sensor
Heating / Nichrome / Iron

Browse all components

How It Works

This project integrates a Bluetooth audio receiver module with a PAM8403 amplifier module to create a self-contained portable speaker system powered by a rechargeable LiPo battery. When you pair a smartphone or computer to the Bluetooth receiver, it streams digital audio wirelessly and converts it into a weak analog stereo audio signal. This analog signal is routed directly into the inputs of the PAM8403 amplifier module. The amplifier uses power from the LiPo battery to boost the tiny audio voltage, driving enough current through the connected speakers to produce audible, clear sound waves. A power switch is placed inline with the battery to control the flow of electrical power to the entire circuit. To keep the LiPo battery charged and safe for use, a TP0456 charging module is wired into the power system, allowing you to replenish the battery via a standard power input. All of these electrical components are housed securely inside a custom enclosure built from acrylic laser-cut parts, assembled using a hot glue gun to hold the structure and speakers firmly in place.

Why Build This

Create a custom, budget-friendly wireless speaker for your desk or workspace.

Learn practical electronics assembly by building a fully functional, portable audio playback device from scratch.

Real-World Application

Portable wireless speakers, custom desktop audio systems, low-power audio reproduction devices.

Skills You'll Learn

Basic circuit wiring

soldering techniques

power management with lithium batteries

audio amplifier integration

wireless module interfacing

mechanical enclosure assembly

Safety Precautions

Ensure proper wiring of the LiPo battery and charging module to prevent short circuits or battery damage. Exercise caution when using a soldering iron and hot glue gun.

Technology Tags

BLUETOOTH

PAM8403

AUDIO AMPLIFIER

ACRYLIC ENCLOSURE

LASER CUTTING

SOLDERING

LIPO BATTERY

Frequently Asked Questions

Do I need to write any computer code or program a microcontroller for this project?

No software or programming is required. The system relies entirely on analog audio routing and hardware modules.

How do I charge the battery once it runs out of power?

The included TP0456 charging module manages the recharging process for the LiPo battery when connected to an appropriate power source.

What tools do I need to complete the physical assembly?

You will need a soldering iron to make secure electrical connections between the wires and modules, and a hot glue gun to secure the speakers and internal parts inside the acrylic enclosure.

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.

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