12/30/2025 2:10 PM - Project Development – Initial Stage

Overview

At this stage, I focused on testing how the project would work and identifying the components I would need. The goal was to validate the general concept before moving forward with more detailed design and implementation.

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Key Decisions

After initial testing and analysis, I decided on the following setup:

• The project will be based on two 5V DC motors
• A custom PDB (Power Distribution Board) will be used
• The main controller will be ESP32-C3-DevKitC-02

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Electronic Components

The system will include the following electronic parts:

Component	Purpose
ESP32-C3-DevKitC-02	Main microcontroller
L7805	Voltage regulator
TB6612FNG	Motor driver
Pin headers	External connections

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Mechanical Design

For the mechanical side of the project, I plan to use:

• LEGO wheels
  
  • In the 3D CAD model, these will be represented as simple generic wheels, as no accurate model was available.
• A simple platform, designed specifically for:
  • 3D printing
• A small front swivel wheel
  • This will improve maneuverability and make turning easier.

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Notes

• The mechanical design is intentionally simple to speed up prototyping.
• All custom parts are designed with rapid iteration in mind.
• The platform geometry will be adjusted after real-world testing.

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12/30/2025 2:11 PM - Making PCB - Schematic Stage

Description

At this stage, I focused on creating the PCB schematic.

The schematic was designed in KiCad.

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Work Summary

This part of the project was not difficult. The schematic consists mainly of:

• The MCU
• Several key components listed below
• Basic and necessary connections between them

Once the components were selected, it was simply a matter of connecting everything correctly.

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Key Points

• No complex circuitry was required
  
• The design is straightforward and functional
  
• The goal was clarity and correctness, not complexity
  

Overall, it was easy work and did not require advanced effort.

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12/30/2025 2:20 PM - Making PCB - Routing and Final Preparation

Description

In the next stage, I focused on routing the PCB and preparing the final board for the project.

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Results

• The PCB layout is clear and functional
  
• No complex routing challenges were encountered
  
• The design meets the project requirements
  

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12/30/2025 2:21 PM - 3D Design

This is finish of design section

Description

After finishing the PCB, I moved on to Fusion 360.

At this stage, I focused on the 3D appearance of the project.

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Design Process

Working on the 3D model was quite enjoyable, and the process went quickly and smoothly.

The main focus was on:

• Integrating the PCB into the 3D design
• Defining the overall shape of the platform
• Making sure all components fit correctly

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