Sampling mesh monitor
About the Sampling mesh monitor PCB
Sampling mesh monitor is an open source STM32 PCB design by jaseg, published on GitHub under the CC-BY-SA-4.0 license. It is a 6-layer board measuring 100 × 100 mm, with 229 components from 40 distinct parts.
Its main chip is the STM32G474RBTX, from the STM32 family. Other key parts include the TPS7B4253QPWPRQ1, 74LVC2G157, PTN36241B, SKYA21003 and TMUXHS4212. By type, the board carries 97 resistors, 90 capacitors, 17 ICs, 17 diodes, 4 inductors and 2 connectors.
It belongs with the test & measurement designs in this gallery.
From the project
Research tamper-sensing mesh monitoring using Time-Domain Reflectometry published in TCHES 2026/1
High Fidelity Security Mesh Monitoring using Low-Cost, Embedded Time Domain Reflectometry =========================================================================================
This repository contains all sources for our paper "High Fidelity Security Mesh Monitoring using Low-Cost, Embedded Time Domain Reflectometry" to be published in CHES 2026/1 (preprint on eprint ). You can find a brief overview of the project on Jan's blog .
Main components on the Sampling mesh monitor
Sampling mesh monitor bill of materials (BOM)
229 components, 40 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS7B4253QPWPRQ1 | HTSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP3.4x6.5mm_Mask2.4x3.7mm | U1 |
| 2 | 74LVC2G157 | MSOP-8_3x3mm_P0.65mm | U2, U3 |
| 1 | PTN36241B | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U4 |
| 2 | SKYA21003 | QFN-12_EP_2x2_Pitch0.5mm | U5, U6 |
| 2 | TMUXHS4212 | DHVQFN-20-1EP_2.5x4.5mm_P0.5mm_EP1x3mm | U7, U8 |
| 1 | STM32G474RBTX STM32G474RBTx | LQFP-64_10x10mm_P0.5mm | U9 |
| 1 | USBLC6-4SC6 | SOT-23-6 | U10 |
| 3 | OPA1656 | SO-8_3.9x4.9mm_P1.27mm | U11, U12, U13 |
| 1 | LP2998 | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.34x2.34mm | U14 |
| 3 | AMS1117-3.3 | SOT-223-3_TabPin2 | U15, U16, U17 |
| 1 | AO3400A | SOT-23 | Q1 |
| 1 | 8MHZ/20P 8MHz/20p | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | C2897291 SFP+ | HCTL_HC-SFP-20P_C2897291 | J1 |
| 1 | USB_C_RECEPTACLE_USB2.0 USB_C_Receptacle_USB2.0 | USB_C_Receptacle_HCTL_HC-TYPE-C-16P-01A | J2 |
| 11 | C2290 0603 white | LED_0603_1608Metric | D1, D2, D4, D6, D7, D12, D13, D14 +3 |
| 2 | 1N4148W | D_SOD-123 | D3, D5 |
| 4 | BAT17-04W | SOT-323_SC-70 | D8, D9, D10, D11 |
| 4 | BLM15HD102SN1D | L_0402_1005Metric | FB1, FB2, FB3, FB4 |
| 27 | 100N 100n | C_0402_1005Metric | C1, C5, C8, C9, C13, C16, C28, C34 +19 |
| 25 | 1u | C_0805_2012Metric | C2, C6, C7, C10, C12, C14, C27, C38 +17 |
Show 20 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 28 | 10N 10n | C_0402_1005Metric | C3, C11, C15, C17, C18, C19, C20, C21 +20 |
| 5 | 47U 47u | C_Elec_6.3x7.7 | C4, C70, C71, C72, C73 |
| 2 | 20P 20p | C_0402_1005Metric | C29, C30 |
| 3 | C | C_0402_1005Metric | C50, C51, C61 |
| 19 | R | R_0402_1005Metric | R1, R2, R3, R5, R6, R7, R10, R15 +11 |
| 12 | 1k | R_0402_1005Metric | R4, R23, R24, R25, R26, R67, R80, R81 +4 |
| 6 | 75 | R_0402_1005Metric | R8, R11, R12, R20, R32, R43 |
| 21 | 0 | R_0402_1005Metric | R9, R13, R14, R16, R17, R19, R29, R30 +13 |
| 4 | 45 | R_0402_1005Metric | R18, R28, R58, R62 |
| 4 | 3K3 3k3 | R_0402_1005Metric | R27, R39, R65, R66 |
| 5 | 10K 10k | R_0402_1005Metric | R40, R47, R48, R49, R70 |
| 6 | 30 | R_0402_1005Metric | R42, R45, R51, R52, R53, R54 |
| 2 | 5K1 5k1 | R_0402_1005Metric | R46, R63 |
| 4 | 91 | R_0402_1005Metric | R56, R57, R59, R61 |
| 2 | 47 | R_0603_1608Metric | R64, R78 |
| 3 | 22K 22k | R_0402_1005Metric | R68, R73, R75 |
| 1 | 100K 100k | R_0402_1005Metric | R69 |
| 4 | 47K 47k | R_0402_1005Metric | R71, R72, R77, R86 |
| 3 | 1M | R_0402_1005Metric | R74, R76, R79 |
| 1 | 100 | R_0402_1005Metric | R84 |
Sampling mesh monitor design files
The KiCad project lives in the jaseg/sampling-mesh-monitor repository on GitHub; these links point at the commit this page was built from.
Sampling mesh monitor: common questions
What microcontroller does the Sampling mesh monitor use?
The Sampling mesh monitor is built around the STM32G474RBTX, from the STM32 family.
How big is the Sampling mesh monitor PCB?
The Sampling mesh monitor measures 100 × 100 mm, has 6 copper layers and is 1.1584 mm thick.
How many components are on the Sampling mesh monitor?
229 components, from 40 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Sampling mesh monitor design files?
From the jaseg/sampling-mesh-monitor repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Sampling mesh monitor design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which jaseg chose for the repository.
Can I test firmware for the Sampling mesh monitor without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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