🖱️ High-Resolution Scroll Wheel

A large, high-resolution scroll wheel inspired by Engineer Bo's YouTube video.

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Documentation

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⚠️ Early Development Phase
This project is still under development. Use at your own risk.

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📅 Roadmap

• BLE HID Support
• Mouse Wheel Click Functionality
• Automatic power off
• Battery Level tuning
• Enclosure refinements
• Scroll acceleration modes

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🔧 Hardware Overview

• Main Controller: ESP32 (subject to maybe change later)
• Magnetic Encoder: AS5600
• Battery Pack: S3P2 NiMH Eneloop cells

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💻 Software Architecture

The entire functionality is now handled by a single ESP32 microcontroller using BLE HID (Human Interface Device) mode.

• The scroll wheel inputs are directly interpreted by the ESP32.
• Input data (e.g. rotation) is sent over Bluetooth Low Energy as HID events, emulating a native scroll device.
• No additional driver or software is needed on the PC — it works like a standard Bluetooth mouse/scroll input.

✅ This simplifies the setup significantly and increases compatibility across Linux, Windows, and macOS.

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🧩 Required Components

Part	Quantity
Main PCB (pre-soldered)	1
Bearing (65×85×10 mm)	1
JST GH Cable Kit	1 set
Cylinder Magnets (3×12 mm)	7
3D-Printed Parts	3
S3P2 NiMH Battery Pack	1
M2×5 Screws	5

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🛠️ Build Guide

🔄 Bearing Preparation

Factory bearings may feel stiff due to thick grease. Here's how to optimize smoothness:

1. Remove both sealing rings.
2. Soak the bearing in isopropyl alcohol (or another grease remover).
3. Scrub out all remaining grease.
4. Let it dry for ~3 hours.
5. Reinstall one sealing ring.
6. Add light machine oil generously into the bearing.
7. Reinstall the second sealing ring.
8. Spin the bearing multiple times to distribute the oil.
9. (Optional) Remove the seals again for an even smoother feel (at the cost of dust protection).

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🚧 Development Gallery

🔌 First PCB Prototype (with known bugs)

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🧱 PCB Inside the Case

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🧪 First Firmware Test (External ESP32)

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🧰 Fully Assembled PCB

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🆕 PCB V2 – Improved & Debugged

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🤝 Contributing

Pull requests, suggestions, and feedback are always welcome — feel free to get involved and help improve the project!
Prototyping and hardware development can get expensive quickly, so if you’d like to support the project financially:

 

Every bit helps keep the ideas (and soldering irons) running!

Credits

Credits to T-vk for creating the ESP32 BLE Mouse Library