2 layers65 × 120 mm
Top
not-sample-text/Proiect-Licenta
This repository represents the final version submitted for my Bachelor's Thesis.
33 parts1
2 layers65 × 120 mm
This repository represents the final version submitted for my Bachelor's Thesis.
- Size
- 65 × 120 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 55
- Pads
- 167
- Tracks, vias
- 178, 134
- Pours
- 122
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 28 Jul 2025
- Updated
- 4 Jul 2026
Overview
Bottom is an open-source printed circuit board by not-sample-text, from the not-sample-text/Proiect-Licenta repository on GitHub. It is a 2-layer board of 65 × 120 mm with 52 parts on 55 nets, routed with 178 tracks and 134 vias.
It is built around the SK6812MINI-E. Its parts include 22 resistors, 12 capacitors, 10 diodes, 2 ICs and 1 connector.
Main components
1README
README.mdRepository Archived
This repository represents the final version submitted for my Bachelor's Thesis.
Active development for this project has moved to ApexPad. Please refer to the new repository for the most recent updates, bug fixes, and feature development.
PROS3 Macropad: A Fully-Programmable Custom Mechanical Macropad
The PROS3 Macropad is a versatile, open-source 12-key macropad built around the powerful ESP32-S3. Designed as a university thesis project, it features a rotary encoder, OLED display, RGB underglow, and a complete software ecosystem for deep customization.
Gallery
A collection of renders showcasing the hardware.
| Top Plate | Top Plate (Angled) |
|---|---|
 |  |
| Top View | Top (Angled) |
|---|---|
 |  ! |
| Bottom Render | Bottom (Angled) |
|---|---|
 |  |
About The Project
This repository contains the complete engineering files (hardware, firmware, and software) for a highly programmable macropad designed to streamline digital workflows.
The project is built on three pillars:
- Hardware: A custom two-part PCB design with a 3D-printable case. It's designed for assembly by hobbyists with through-hole components and hot-swap sockets.
- Firmware: Custom C++ code running on the ESP32-S3. It manages input, the OLED display, lighting, and communication with the host computer.
- Software Suite: A powerful combination of a static web-based configurator (for visually creating keymaps) and a headless Python-based background daemon (for executing complex OS-level actions via a system tray UI).
This architecture allows the macropad to go beyond simple keystrokes and act as a powerful automation tool.
For a complete technical deep-dive, please see the Full Technical Documentation. (Pentru documentația în limba română, consultați acest document).
Features
- 12 Hot-Swappable Mechanical Keys: Customize your macropad with any MX-style switches, no soldering required.
- Rotary Encoder with Push-Button: Perfect for volume control, scrolling through timelines, or cycling through layers.
- OLED Display: Get real-time feedback on your current layer, connection status, and more.
- Powerful Layering System: Switch between 4 distinct layers to multiply your available keys.
- Dual-Mode Actions:
- HID Mode: Send standard keystrokes and shortcuts that work on any OS without drivers.
- Host Control Mode: Trigger complex actions on your computer—like launching native apps or executing shell scripts—using the auto-discovering background daemon.
- Web-Based Configurator: A zero-dependency, browser-based UI for remapping keys, creating macros, and configuring lighting. Features a guided interactive tour and smart JSON export.
- RGB Underglow: 10 addressable RGB LEDs for brilliant lighting effects, managed by FastLED.
- Dual Connectivity: Seamlessly switch between a wired USB-C connection and wireless Bluetooth/BLE HID.
Getting Started
- Build the Hardware: Use the KiCad files in the
hardware/directory to fabricate the PCBs and source the components from the Bill of Materials. - Flash the Firmware: Use PlatformIO to compile and upload the firmware from the
firmware/directory to the ESP32-S3. - Configure Your Layout: Access the Web Configurator (locally or via GitHub Pages) to design your custom keymaps and export the
config.jsonfile to your Downloads folder. - Run the Host Daemon: Download the standalone executable from the Releases page (or run the Python script). It automatically connects to the hardware, detects your config file, and runs invisibly in your system tray to unlock the command and launcher layers.
For a detailed, step-by-step guide, please refer to the Complete User Workflow section in the documentation.
Acknowledgements
This project was made possible by the following open-source projects and communities:
- ScottoKeebs: For the KiCad libraries and footprints for mechanical keyboards.
- The Mechanical Keyboard Community: For providing a constant source of inspiration and knowledge.
License
The hardware and software are provided as-is under a permissive license. This project includes components from third-party libraries which are subject to their own licenses. Please see the individual source files for more details.
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 0.1uF | Bottom-Footprints:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12 |
| 12 | 10k | Bottom-Footprints:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R21, R22 |
| 10 | 220 | Bottom-Footprints:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11, R12, R13, R14, R15, R16, R17, R18, R19, R20 |
| 10 | SK6812MINI | Bottom-Footprints:SK6812-MINI-E | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2, H3, H4 |
| 1 | Conn_01x15_Socket | Bottom-Footprints:PinSocket_1x15_P2.54mm_Vertical | J1 |
| 1 | LOGO | Bottom-Footprints:nubcat_24mm | G*** |
| 1 | TPS22918DBVR | Bottom-Footprints:SOT95P280X145-6N | IC1 |
| 1 | ~ | Bottom-Footprints:ProS3_TH | U1 |
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not-sample-text/Proiect-Licenta
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Questions
How big is the Bottom PCB?
It measures 65 × 120 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bottom use?
52 parts, built around the SK6812MINI-E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Bottom KiCad files?
From the not-sample-text/Proiect-Licenta repository on GitHub, at the commit this page was made from: the board is hardware/pcb/bottom/bottom.kicad_pcb and its schematic hardware/pcb/bottom/bottom.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bottom design in my own project?
Its repository states no licence, so its author keeps all rights: ask not-sample-text before reusing the design.