4 layers80.5 × 50 mm
4 layers65 × 38.5 mm
Tracker
zzertexx/GPS-TrackerSimple GPS Tracker working with SIM to share location
- Size
- 65 × 38.5 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 78
- Nets
- 161
- Pads
- 371
- Tracks, vias
- 629, 74
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.99 (file 20260603)
- Created
- 7 Jun 2026
- Updated
- 23 Jun 2026
Overview
Tracker is an open-source printed circuit board by zzertexx, from the zzertexx/GPS-Tracker repository on GitHub. It is a 4-layer board of 65 × 38.5 mm with 78 parts on 161 nets, routed with 629 tracks and 74 vias.
It is built around the A7680C-LANV, L80-R and NRF52832-QFAA-R, with the 2450AT18A100E, SMN-303 and TP4056-42-ESOP8 among its other parts. Its parts include 31 capacitors, 14 resistors, 12 ICs, 5 diodes and 3 inductors. It belongs with the nRF52 and nRF5x boards of this library.
Main components
10
A7680C-LANV
LCC-LGA3.4V~4.2V FDD-LTE、TDD-LTE I2C、UART、GPIO、SPI LCC-LGA 2G/3G/4G/5G Modules ROHSSIMCom Wireless Solutions2G/3G/4G/5G Modules
L80-R
SMDHot start acceleration SMD GNSS Modules ROHSQuectelSatellite Positioning Modules
NRF52832-QFAA-R
QFN-48-EP(6x6)-40℃~+85℃ -96dBm 1.7V~3.6V 2.4GHz 2Mbps 4dBm 5.3mA 5.4mA Bluetooth SPI、UART、I2C transceiver QFN-48-EP(6x6) RF Transceiver ICs ROHSNORDICRF Transceiver ICs
2450AT18A100E
1206-40℃~+125℃ 0.5dBi 1.3mm 1.6mm 2.4GHz 2W 3.2mm 50Ω Patch Antenna SMA 1206 Antennas ROHSJohanson DielectricsAntennas
SMN-303
SMD-25℃~+85℃ 1.37mm Connector and Ejector Nano-SIM Card Push-Push With Card Detect SMD SIM Card Connectors ROHSXUNPUSIM Card Connectors
TP4056-42-ESOP8
ESOP-8-40℃~+85℃ 1 1A 2uA 4.2V 4V~8V Charging IC Lithium Battery Support ESOP-8 Battery Management ROHSTOPPOWERBattery Management
TXS0102DCU
TSSOP82-Bit Bidirectionnal Voltage-Level Translator for Open-Drain and Push-Pull ApplicationsTexas InstrumentsUncategorised
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
ESDBW5V0A1
DFN1006-2-55℃~+125℃ 1 100nA 12V 360W@8/20us 5V 60pF 7.2V ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 DFN1006-2 ESD and Surge Protection (TVS/ESD) ROHSLeiditechESD And Surge Protection (TVS/ESD)
LXES15AAA1-153
DFN1006-2ESD And Surge Protection (TVS/ESD)TECH PUBLIC
README
README.mdGPS Tracker
Use this bracelet to get live location and watch on any device
do not use to stalk people by giving them "unsuspicious" bracelet and looking where they are!!
Zine
Images
How to use?
- Order components from Bill of Materials and 3D Print case
- Solder electronics and assembly into case
- Insert SIM-Card with cellular data over 2G
- place your parameters in firmware "modem.h" line 5 and 8
- Open Firmware via nRF connect in VS Code using Add existing application
- Add build configuration: board: nRF52dk_nRF52832
- Wait for build -> connect to board via SWD: github.com/AndruPol/nrf52832-recover
Features
- Button to Sleep/Wake
- LED indicator of work status
- BLE advertising for future app
- Send location data to personal Google Sheet
- Charge with Type-C
- Compatible with lots of watch straps
In current version, software may have significant bugs, improper code, not enough features, but I will edit/fix as I get hardware to debug
4-layer PCB
Built in KiCad 10.99 night build
You can't export 3D model in default KiCad 10.0.3 because of error
Ignore User.Comments
1 Layer - F.Cu
2 Layer - 3.3V
3 Layer - GND
4 Layer - B.Cu
Why did I build it?
My bro asked me if I can build one. I don't have any interest for GPS locators, or needness for one. I just wanted to try myself in designing Wearable and also help my bro, so I did it and I felt real hardship of building in limited space. Currently my design is really bad and MUST be fixed in next updates by tightening free space.
Bill of Materials
| Name | Quantity |
|---|---|
| nRF52832 | x1 |
| CH340C | x1 |
| USB-C 14 pin | x1 |
| TP4056-42-ESOP8 | x1 |
| FS8205A | x1 |
| DW01A | x1 |
| XC6206P332MR-G | x1 |
| TXS0102DCUR | x1 |
| XUNPU SMN-303 | x1 |
| A7680C-LANV | x1 |
| ZIISOR TX4G-FPC-4015 | x1 |
| 16-213SURC/S530-A4/TR8 | x1 |
| 2450AT18A100E | x1 |
| NX2016SA-32MHZ | x1 |
| SC-20S,32.768kHz | x1 |
| BLM21PG300SN1D | x1 |
| ESDBW5V0A1 | x1 |
| LXES15AAA1-153 | x1 |
| L80-R | x1 |
| 500 mAh 503040 Battery | x1 |
| Straps - Galaxy watch 6 18mm | x1 |
| ST-LINK V2 | x1 |
| B3U-3000P LED Diode | x1 |
| LXES15AAA1-153 | x1 |
| 100nF C | x14 |
| 10uF C | x2 |
| 1uF C | x4 |
| 12pF C | x6 |
| 100uF C | x2 |
| 4.7uF C | x1 |
| 0.8pF C | x1 |
| 10pF C | x1 |
| 33pF C | x1 |
| 100pF C | x1 |
| 10pF C | x1 |
| 1.2K R | x1 |
| 1K R | x3 |
| 100 R | x5 |
| 5.1K R | x2 |
| 10K R | x1 |
| 0 R | x1 |
| 10uH L | x1 |
| 3.9nH L | x1 |
| 15nH L | x1 |
| M2 Screws | x8 |
Parts
78| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100nF | Capacitor_SMD:C_0402_1005Metric | C6, C7, C8, C9, C11, C21, C23, C24, C25 |
| 6 | 12pF | Capacitor_SMD:C_0402_1005Metric | C14, C15, C16, C17, C19, C20 |
| 5 | 100 | Resistor_SMD:R_0402_1005Metric | R5, R8, R9, R11, R12 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 3 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C28 |
| 3 | 1K | Resistor_SMD:R_0402_1005Metric | R2, R3, R4 |
| 2 | 100uF | Capacitor_SMD:CP_Elec_5x5.4 | C30, C31 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C3, C22 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C13, C29 |
| 2 | 1uF(ceramic) | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 1 | 0 | Resistor_SMD:R_0402_1005Metric | R13 |
| 1 | 0.8pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C18 |
| 1 | 1.2K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 100 | Capacitor_SMD:C_0402_1005Metric | R14 |
| 1 | 100pF | Capacitor_SMD:C_0402_1005Metric | C12 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric | R10 |
| 1 | 10pF | Capacitor_SMD:C_0402_1005Metric | C26 |
| 1 | 10uH | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 15nH | Inductor_SMD:L_0402_1005Metric | L3 |
| 1 | 2450AT18A100E | footprint:ANT-SMD_L3.2-W1.6 | U11 |
| 1 | 3.9nH | Inductor_SMD:L_0402_1005Metric | L2 |
| 1 | 32.768kHz | footprint:OSC-SMD_L2.0-W1.2 | Y2 |
| 1 | 32MHz | footprint:CRYSTAL-SMD_4P-L2.0-W1.6-BL | Y3 |
| 1 | 33pF | Capacitor_SMD:C_0402_1005Metric | C27 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | A7680C-LANV | footprint:LCC-LAG_L17.6-W15.7_A7680C | U2 |
| 1 | Battery | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | BT1 |
| 1 | CH340C_C7464026 | footprint:SOP-16_L10.0-W3.9-P1.27-LS6.0-BL | U8 |
| 1 | CHRG | LED_SMD:LED_0402_1005Metric_Pad0.77x0.64mm_HandSolder | D2 |
| 1 | Conn_Coaxial_Small | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J1 |
| 1 | DW01A_C351410 | footprint:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | U6 |
| 1 | ESDBW5V0A1 | Diode_SMD:D_0402_1005Metric | D3 |
| 1 | FS8205A_C908265 | footprint:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BR | U7 |
| 1 | FerriteBead | footprint:L0805 | FB1 |
| 1 | L80-R | footprint:GPSM-SMD_L80-R | U3 |
| 1 | LED | LED_SMD:LED_Kingbright_APA1606_1.6x0.6mm_Horizontal | D5 |
| 1 | LXES15AAA1-153 | Diode_SMD:D_0402_1005Metric | D4 |
| 1 | NRF52832-QFAA-R | footprint:QFN-48_L6.0-W6.0-P0.40-BL-EP3.8 | U1 |
| 1 | SMN-303 | footprint:SIM-SMD_SMN-303 | U10 |
| 1 | STDBY | LED_SMD:LED_0402_1005Metric_Pad0.77x0.64mm_HandSolder | D1 |
| 1 | SWD_CLK | TestPoint:TestPoint_Pad_D1.5mm | TP4 |
| 1 | SWD_IO | TestPoint:TestPoint_Pad_D1.5mm | TP5 |
| 1 | SW_Push | footprint:KEY-SMD_B3U-3000P | SW1 |
| 1 | TP4056-42-ESOP8 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U5 |
| 1 | TXS0102DCU | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U9 |
| 1 | TYPE-C-31-M-12 | footprint:USB-C_SMD-TYPE-C-31-M-12_1 | U12 |
| 1 | TestPoint | TestPoint:TestPoint_Pad_D1.5mm | TP1 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23-3 | U4 |
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Questions
How big is the Tracker PCB?
It measures 65 × 38.5 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Tracker use?
78 parts, built around the A7680C-LANV, L80-R, NRF52832-QFAA-R and 2450AT18A100E. 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 Tracker KiCad files?
From the zzertexx/GPS-Tracker repository on GitHub, at the commit this page was made from: the board is PCB/tracker.kicad_pcb and its schematic PCB/tracker.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Tracker design in my own project?
Its repository states no licence, so its author keeps all rights: ask zzertexx before reusing the design.