4 layers40 × 60 mm TMDT1UC1, the printed circuit board in 3D

TMDT1UC1

Tagged ranging and coordinate position system for FRC events. Using UWB ranging with anchors and tags to provide realtime positioning of robots

Full screen GitHub .kicad_pcb

Size: 40 × 60 mm
Copper layers: 4
Thickness: 0.19 mm
Parts: 35
Nets: 65
Pads: 199
Tracks, vias: 266, 49
Pours: 9
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 22 Feb 2026
Updated: 4 Mar 2026

Overview

TMDT1UC1 is an open-source printed circuit board by GrimGT, from the GrimGT/Meridian repository on GitHub. It is a 4-layer board of 40 × 60 mm with 35 parts on 65 nets, routed with 266 tracks and 49 vias.

It is built around the DWM3000, W25Q128JVSIQ and ADXL343BCC, with the CR2032-BS-6-1 among its other parts. Its parts include 17 capacitors, 6 resistors, 4 ICs, 1 connector and 1 inductor. It belongs with the radio and wireless boards and the STM32 boards of this library.

Main components

README

README.md

ArenaTrace

UWB-based arena tracking system. Tags worn by players communicate with fixed anchors over Ultra-Wideband radio. Anchor positions are collected by a server and surfaced to a frontend.

Architecture

text

firmware/tag      — nRF52833 UWB tag (worn by players)
firmware/anchor   — nRF52833 UWB anchor (fixed positions)
server            — Native host server (collects anchor data)
common            — Shared protocol types (no_std, used by all)
xtask             — Build orchestrator (cargo xtask)

Prerequisites

Rust toolchain

Install Rust via rustup:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

Add the embedded ARM target:

rustup target add thumbv7em-none-eabihf

Flashing tools (optional, for deploying to hardware)

cargo install probe-rs-tools

Building

All projects are built via cargo xtask from the workspace root. No Make, no external build tools required.

# Build everything
cargo xtask build

# Build firmware only (tag + anchor)
cargo xtask build-firmware

# Build server only
cargo xtask build-server

Individual projects can also be built directly from their directories:

cd firmware/tag && cargo build
cd firmware/anchor && cargo build
cd server && cargo build

Project structure

text

ArenaTrace/
├── Cargo.toml              # Workspace root — shared deps and profiles
├── .cargo/config.toml      # ARM linker flags, xtask alias
├── common/                 # Shared no_std protocol types
├── firmware/
│   ├── tag/                # Tag firmware (nRF52833)
│   │   ├── memory.x        # nRF52833 memory map
│   │   └── .cargo/         # ARM target override
│   └── anchor/             # Anchor firmware (nRF52833)
│       ├── memory.x        # nRF52833 memory map
│       └── .cargo/         # ARM target override
├── server/                 # Host server
└── xtask/                  # Build orchestrator

Versioning

Version is defined once in the workspace Cargo.toml and inherited by all crates. To update the version, change it in one place:

toml

# Cargo.toml
[workspace.package]
version = "0.2.0"

common::version() exposes it at runtime for all projects.

Category and platform

Radio and wireless STM32

Project files

Show this board on your page

https://pcbkit.io/boards/GrimGT/Meridian

The board's own page, for a message or a post.

Source

Repository: GrimGT/Meridian
Board file: boards/TMDT1UC1/TMDT1UC1.kicad_pcb
Commit: 666b743
Licence: Not stated

Parts

Qty	Value	Footprint	References
10	100n	Capacitor_SMD:C_0402_1005Metric	C1, C2, C3, C4, C5, C8, C10, C16, C28, C29
4	10u	Capacitor_SMD:C_0603_1608Metric	C6, C7, C13, C14
4	MountingHole_Pad	MountingHole:MountingHole_3.2mm_M3_Pad_Via	H1, H2, H3, H4
3	10k	Resistor_SMD:R_0402_1005Metric	R1, R3, R6
2	100k	Resistor_SMD:R_0402_1005Metric	R2, R4
1	100u	Capacitor_SMD:C_0603_1608Metric	C15
1	10n	Capacitor_SMD:C_0402_1005Metric	C12
1	1k	Resistor_SMD:R_0402_1005Metric	R5
1	47u	Capacitor_SMD:C_0603_1608Metric	C9
1	4u7	Inductor_SMD:L_1210_3225Metric	L1
1	ADXL343	Package_LGA:LGA-14_3x5mm_P0.8mm_LayoutBorder1x6y	U5
1	CR2032-BS-6-1	meridian:BAT_CR2032-BS-6-1	BT1
1	DWM3000	RF_Module:DWM1000	DWM1
1	STM32U073CBTx	Package_QFP:LQFP-48_7x7mm_P0.5mm	U1
1	TC2050	Connector:Tag-Connect_TC2050-IDC-NL_2x05_P1.27mm_Vertical	J1
1	TPS61222DCK-FIXED	Package_TO_SOT_SMD:Texas_R-PDSO-G6	U4
1	W25Q128JVS	Package_SO:SOIC-8_5.3x5.3mm_P1.27mm	U2

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Questions

How big is the TMDT1UC1 PCB?

It measures 40 × 60 mm and has 4 copper layers, 0.19 mm thick.

What parts does the TMDT1UC1 use?

35 parts, built around the DWM3000, W25Q128JVSIQ, ADXL343BCC and CR2032-BS-6-1. 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 TMDT1UC1 KiCad files?

From the GrimGT/Meridian repository on GitHub, at the commit this page was made from: the board is boards/TMDT1UC1/TMDT1UC1.kicad_pcb and its schematic boards/TMDT1UC1/TMDT1UC1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the TMDT1UC1 design in my own project?

Its repository states no licence, so its author keeps all rights: ask GrimGT before reusing the design.