2 layers84.2 × 100 mm
Fabpack out v5 8
yuz207/agentpad13
agentpad13 — open-source 13-key macropad for agentic work (RP2040, vial-qmk, planar joystick, Raw HID agent-status protocol)
126 parts41
2 layers31 × 45.5 mm
- Size
- 31 × 45.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 58
- Pads
- 138
- Tracks, vias
- 264, 13
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Mar 2026
- Updated
- 2 Mar 2026
Overview
HID is an open-source printed circuit board by sasidhar1918, from the sasidhar1918/PCB-Implementation repository on GitHub. It is a 2-layer board of 31 × 45.5 mm with 21 parts on 58 nets, routed with 264 tracks and 13 vias.
It is built around the RP2040, W25Q128JVSIQ and AP2112K-3.3, with the USBLC6-2SC6 among its other parts. Its parts include 8 capacitors, 6 resistors, 4 ICs, 2 connectors and 1 crystal. It belongs with the RP2040 boards of this library.
Main components
4
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
README
HID/README.mdRP2040 Custom HID Device: Technical Implementation
🚀 Project Overview
This project is a high-performance Human Interface Device (HID) built on the Raspberry Pi RP2040 microcontroller. Moving beyond simple breadboard prototypes, this implementation features a production-ready PCB designed to handle high-speed USB data signals with professional-grade integrity.
🛠️ My Implementation Approach
1. High-Speed Data Integrity
For the USB-C interface, I prioritized signal quality for the D+ and D- differential pairs:
- Routing: Minimal trace length to reduce latency and interference.
- Isolation: Kept data lines isolated from noisy power components.
- Grounding: Implemented a robust ground system to provide a stable reference and prevent data corruption.
2. Thermal & Noise Management (Via Stitching)
A key technical feature of this design is the strategic use of GND Via Stitching:
- Copper Pours: Large planes on both Top and Bottom layers to eliminate "floating islands."
- EMI Shielding: Manual via placement creates a "Faraday cage" effect to suppress electrical noise.
- Thermal Dissipation: Efficiently transfers heat from the RP2040 into the bottom copper plane.
3. Power Delivery Architecture
Designed to handle 5V input from the USB-C receptacle with a focus on stability:
- Filtering: series of decoupling capacitors to suppress high-frequency noise.
- Proximity: Components placed as close as possible to the RP2040 power pins to handle sudden current draws from the dual-core processor.
4. Design for Excellence (DfX)
The layout adheres to strict Design Rule Checks (DRC) for seamless manufacturing:
- Soldering: Clearances optimized for easy component assembly.
- Legibility: Silkscreen labels are positioned to avoid overlap with solder pads.
- CNC Ready: Precisely defined board edges for factory routing.
📊 Technical Specifications
| Feature | Specification |
|---|---|
| Core | RP2040 (Dual ARM Cortex-M0+ @ 133MHz) |
| Interface | USB 2.0 via USB-C |
| PCB Topology | 2-Layer FR-4, 1.6mm thickness |
| Grounding | Symmetrical Top/Bottom copper pours with via stitching |
📂 How to Use This Project
This repository contains the full design source. You can explore the implementation details within the KiCad files, where I have documented:
- Specific trace widths.
- Clearance constraints used to achieve a zero-error DRC report.
Designed and implemented with a focus on signal integrity and professional PCB manufacturing standards.
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4, C5, C6 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C8 |
| 2 | 27 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R5 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 1M | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 1 | 4.7n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | Conn_01x04 | Connector_PinHeader_1.27mm:PinHeader_1x04_P1.27mm_Vertical | J2 |
| 1 | ECS-2520MV-xxx-xx | Oscillator:Oscillator_SMD_ECS_2520MV-xxx-xx-4Pin_2.5x2.0mm | Y1 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4110 | J1 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U2 |
Questions
How big is the HID PCB?
It measures 31 × 45.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HID use?
21 parts, built around the RP2040, W25Q128JVSIQ, AP2112K-3.3 and USBLC6-2SC6. 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 HID KiCad files?
From the sasidhar1918/PCB-Implementation repository on GitHub, at the commit this page was made from: the board is HID/HID.kicad_pcb and its schematic HID/HID.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HID design in my own project?
Its repository states no licence, so its author keeps all rights: ask sasidhar1918 before reusing the design.
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