2 layers28.6 × 39 mm
2 layers74.9 × 50.2 mm
Water meter pcb
Mechanix97/TPP-PCBTPP-PCB
- Size
- 74.9 × 50.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 56
- Nets
- 123
- Pads
- 281
- Tracks, vias
- 338, 31
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Jun 2026
- Updated
- 7 Jun 2026
Overview
Water meter pcb is an open-source printed circuit board by Mechanix97, from the Mechanix97/TPP-PCB repository on GitHub. It is a 2-layer board of 74.9 × 50.2 mm with 56 parts on 123 nets, routed with 338 tracks and 31 vias.
It is built around the STM32L031K6T6, PRTR5V0U2X and BG95-M3, with the TXS0108EPW, XC6220A331MR-G and SMAJ36CAQ among its other parts. Its parts include 20 capacitors, 11 resistors, 6 ICs, 5 connectors and 4 diodes. It belongs with the STM32 boards of this library.
Main components
9
STM32L031K6T6
LQFP-32(7x7)-40℃~+85℃ 1.8V~3.6V 12bit 1KB 25 32 Bit 32KB 32MHz 8KB ARM Cortex-M0+ Built-in FLASH LQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
BG95-M3
LGA-102_23.6X19.9mmLGA-102_23.6X19.9mm New Arrivals ROHSQuectelUncategorised
TXS0108EPW
TSSOP-20-40℃~+85℃ 1 1.4V~3.6V 1.65V~5.5V 60Mbps 8 Automatic direction detection、Output enable high-impedance、Integrated pull-up resistor Bidirectional Level translator Push-Pull、Open-drain TSSOP-20 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
XC6220A331MR-G
SOT-25-40℃~+85℃@(Ta) 1 18uA 1A 3.3V 50dB@(1kHz) 655mV@(1A) 6V Fixed Over Current Protection、Over Temperature Protection、Enable、Short Circuit Protection Positive SOT-25 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SMAJ36CAQ
DO-214AC(SMA)-55℃~+175℃ 1uA 36V 400W@10/1000us 44.2V 58.1V 6.9A Bidirectional TVS DO-214AC(SMA) ESD and Surge Protection (TVS/ESD) ROHSYangzhou Yangjie Electronic TechnologyESD And Surge Protection (TVS/ESD)
BSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
PMEG6010CEJ
SOD-323Schottky DiodesDOWO
SMBJ5.0CA
DO-214AA(SMB)-65℃~+150℃ 5V 600W@10/1000us 65.3A@10/1000us 7V 800uA 9.2V Bidirectional TVS DO-214AA(SMB) ESD and Surge Protection (TVS/ESD) ROHSMDDESD And Surge Protection (TVS/ESD)
Parts
56| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_SMD:C_0402_1005Metric | C3, C7, C10, C11, C12, C16, C19 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R7, R8 |
| 2 | 0R | Resistor_SMD:R_0402_1005Metric | R10, R11 |
| 2 | 100uF 10V | Capacitor_SMD:C_0805_2012Metric | C2, C6 |
| 2 | 10pF | Capacitor_SMD:C_0402_1005Metric | C5, C9 |
| 2 | 12pF | Capacitor_SMD:C_0402_1005Metric | C14, C15 |
| 2 | 1M 1% | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 33pF | Capacitor_SMD:C_0402_1005Metric | C4, C8 |
| 2 | 47R | Resistor_SMD:R_0402_1005Metric | R5, R6 |
| 2 | DNP (match) | Capacitor_SMD:C_0402_1005Metric | C17, C18 |
| 2 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143 | U4, U5 |
| 2 | SMAJ3.6CA | Diode_SMD:D_SMA | D2, D4 |
| 1 | 0.47F 5.5V | Capacitor_Tantalum_SMD:CP_EIA-3528-21_Kemet-B | C1 |
| 1 | 0R (match) | Inductor_SMD:L_0402_1005Metric | L1 |
| 1 | 100R | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 10nF | Capacitor_SMD:C_0402_1005Metric | C20 |
| 1 | 10uF | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D1.5mm | TP2 |
| 1 | ABS06 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | BG95-M3 | BG95:XCVR_BG95 | U2 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.5mm | TP3 |
| 1 | Hall sensor | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal | J4 |
| 1 | LS33600 3.6V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BAT1 |
| 1 | Nano SIM | Connector_Card:nanoSIM_GCT_SIM8060-6-0-14-00 | J2 |
| 1 | PMEG6010CEJ | Diode_SMD:D_SOD-123 | D1 |
| 1 | PULSE | TestPoint:TestPoint_Pad_D1.5mm | TP6 |
| 1 | RX_BG95 | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
| 1 | SMBJ5.0CA | Diode_SMD:D_SMB | D3 |
| 1 | STM32L031K6T6 | Package_QFP:LQFP-32_7x7mm_P0.8mm | U1 |
| 1 | TC2030 SWD | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J3 |
| 1 | TXS0108EPW | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U6 |
| 1 | TX_BG95 | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | UART dbg | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | VBAT | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | XC6220A331MR | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | u.FL | Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical | J1 |
Questions
How big is the Water meter pcb PCB?
It measures 74.9 × 50.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Water meter pcb use?
56 parts, built around the STM32L031K6T6, PRTR5V0U2X, BG95-M3 and TXS0108EPW. 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 Water meter pcb KiCad files?
From the Mechanix97/TPP-PCB repository on GitHub, at the commit this page was made from: the board is water-meter-pcb.kicad_pcb and its schematic cellular.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Water meter pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask Mechanix97 before reusing the design.
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