MaDDy Buddy: Building a DIY Flipper Zero-Inspired Gadget From Scratch

Introduction

Have you ever wanted a portable device that could interact with electronics around you, capture signals, and help you learn more about embedded systems? That's exactly what inspired me to create MaDDy Buddy.

MaDDy Buddy is a DIY electronics gadget inspired by the concept of Flipper Zero. Instead of purchasing an expensive commercial device, I decided to build my own version from scratch using readily available components and custom firmware.

In this article, I'll walk you through the design process, hardware selection, software development, enclosure creation, and testing of Version 0.1 of MaDDy Buddy.

What is MaDDy Buddy?

MaDDy Buddy is a compact handheld electronics tool designed for makers, students, and hardware enthusiasts.

The first version focuses on infrared communication, allowing users to capture and replay IR remote control signals. Future versions will expand its capabilities significantly.

Current Features

1. IR Signal Capture
2. IR Signal Replay/Emulation
3. OLED Display Interface
4. Portable Handheld Design
5. ESP32-Based Hardware
6. Simple Menu Navigation

Planned Features

1. Sub-GHz Wireless Support
2. RFID Functionality
3. NFC Support
4. Advanced Signal Analysis
5. Wireless Testing Tools
6. Improved User Interface

Components Used

The following components were used in this project:

1. ESP32 Development Board
2. 0.96" OLED Display
3. IR Receiver Module
4. IR LED Transmitter
5. Push Buttons
6. Rechargeable Battery
7. Charging Circuit
8. Custom PCB / Prototype Board
9. 3D Printed Enclosure

Most of these parts are inexpensive and easily available online. Buy These Parts

Before building the hardware, I first defined the core objectives of the project.

The main goal was to create a low-cost handheld device capable of:

1. Capturing IR remote signals.
2. Saving those signals.
3. Replaying the signals on demand.
4. Providing a simple user interface.

The project was intentionally kept simple for the first version so that future features could be added without redesigning the entire platform.

The ESP32 serves as the brain of the system.

The IR receiver is connected to one GPIO pin and listens for incoming infrared signals from devices such as:

1. TV Remotes
2. Air Conditioner Remotes
3. LED Controller Remotes
4. Media Player Remotes

The captured data is processed and stored by the ESP32.

An IR LED transmitter is used to recreate and transmit the same signal back to the target device.

The OLED display provides menu navigation and real-time information about captured signals.

The firmware was developed using the Arduino IDE.

Several modules were created:

IR Capture Module

This module listens for incoming infrared signals and decodes them.

Signal Storage Module

Captured signals can be stored temporarily and selected later for replay.

Signal Transmission Module

The stored data is transmitted through the IR LED to emulate the original remote control.

User Interface Module

A menu-driven interface allows users to navigate through different functions using buttons.

The code was optimized to ensure smooth operation while maintaining low memory usage.

Download The Files

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Looking for the STL files?Drop me a quick DM and I’ll send you the download link right away! or click here

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Once all components were ready, assembly began.

The process involved:

1. Soldering all electronic components.
2. Installing the display.
3. Mounting the ESP32.
4. Connecting the IR modules.
5. Installing buttons.
6. Fitting the battery.
7. Securing everything inside the enclosure.

Careful cable management helped maximize the available space inside the case.

Testing is one of the most important stages of any hardware project.

Several remote controls were used to verify functionality.

Tests Performed

1. TV Remote Signal Capture
2. TV Remote Signal Replay
3. LED Strip Controller Testing
4. Air Conditioner Remote Testing
5. User Interface Validation

The device successfully captured and replayed signals with good reliability.

Multiple iterations of firmware improvements were made to increase accuracy and response speed.

Challenges Faced

Every project comes with challenges.

Some of the issues encountered during development included:

1. IR Signal Decoding Variations
2. Limited Internal Space
3. Power Management Optimization
4. User Interface Improvements
5. Hardware Noise and Interference

These challenges helped improve both the hardware and software design of the final prototype.

Future Improvements

Version 0.1 is only the beginning.

Future releases of MaDDy Buddy may include:

Version 0.2

1. Better Menu System
2. Improved Signal Storage
3. Larger Display Support

Version 0.3

1. RFID Support
2. NFC Support
3. Wireless Analysis Features

Long-Term Goals

1. Sub-GHz Communication
2. Expandable Firmware
3. Open Hardware Design
4. Community Contributions

The objective is to transform MaDDy Buddy into a powerful multifunction electronics tool for makers and experimenters.

Final Thoughts

Building MaDDy Buddy has been an exciting journey that combined electronics, programming, 3D design, and product development.

What started as an idea inspired by Flipper Zero turned into a fully functional DIY gadget capable of capturing and replaying infrared signals.

The best part of creating your own hardware is the freedom to customize and improve it over time. This project is only the first step, and many new features are already planned for future versions.

If you're interested in embedded systems, ESP32 projects, hardware development, or DIY electronics, I encourage you to build your own version and experiment with new ideas.

Happy Making!