2 layers67.9 × 38.8 mm
DT770 Bluetooth Mod
farbefreak/DT770-BT-Mod
Hardware + Modding guide to add Bluetooth to DT 770 Headphones
38 parts15
2 layers85.8 × 53.4 mm
Wtracker
supisbe12/WtrackA PCB that tracks it's location using both bluetooth and gps system
- Size
- 85.8 × 53.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 84
- Pads
- 178
- Tracks, vias
- 253, 21
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Jul 2026
- Updated
- 11 Aug 2026
Overview
Wtracker is an open-source printed circuit board by supisbe12, from the supisbe12/Wtrack repository on GitHub. It is a 2-layer board of 85.8 × 53.4 mm with 37 parts on 84 nets, routed with 253 tracks and 21 vias.
It is built around the ATGM336H-5N31, NRF52840-QIAA-R and RFX2401C, with the 2450LP14A100T, GPS1003 and 0402CG101J500NT among its other parts. Its parts include 20 capacitors, 6 inductors, 4 ICs, 1 resistor and 1 crystal. It belongs with the radio and wireless boards and the nRF52 and nRF5x boards of this library.
Main components
12
ATGM336H-5N31
SMD,10.1x9.7mm-148dBm -40℃~+85℃ 2.5m 2.7V~3.6V 25mA@3.3V 35s GPS、BDS UART、I2C SMD,10.1x9.7mm GNSS Modules ROHS杭州中科微GNSS Modules
NRF52840-QIAA-R
AQFN-73-EP(7x7)-95dBm 1.7V~5.5V 2.4GHz 2.4GHz~2.4835GHz 2Mbps 4.82mA 6.26mA 8dBm SPI、USB、UART、ADC、I2S、PWM ZigBee、Bluetooth、LoRa、ISM transceiver AQFN-73-EP(7x7) RF Transceiver ICs ROHSNORDICRF Transceiver ICs
RFX2401C
QFN-16-EP(3x3)-10dB -12dB -15dB -40℃~+85℃ -8dB -8dBm 2.4GHz~2.5GHz 22dBm 2V~3.6V ZigBee 集成低噪声放大器、集成射频开关、集成功率放大器、集成射频滤波器、集成功率检测器 QFN-16-EP(3x3) RF Front End Circuits ROHSSkyworks SolutionsRF Front End Circuits
2450LP14A100T
SMD-6P,0.8x1.6mm0.5dB Low Pass SMD-6P,0.8x1.6mm RF Filters ROHSJohanson DielectricsRF Filters
GPS1003
SMD1.47mm 1.5 1.575GHz 10mm 3mm 4.3dBi 50Ω Patch Antenna SMD Antennas ROHSRainsun microwave TechAntennas
0402CG101J500NT
0402100pF 50V C0G ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT0402CG120J500NT
040212pF 50V C0G ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
SDFL1608S100KTF
06031.85Ω 10uH 17MHz 30@2MHz 3mA ±10% 0603 Inductors (SMD) ROHSSunlordInductors (SMD)
LQW15AN47NG00D
04021.08Ω 210mA 47nH Unshielded Inductor ±2% 0402 Power Inductors ROHSMurataPower InductorsLQP15MN4N7B02D
040213@500MHz 160mA 4.7nH 600mΩ 6GHz Thick Film Inductor 0402 Inductors (SMD) ROHSMurataInductors (SMD)CC0402FRNPO9BN221
0402220pF 50V NP0 ±1% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
ANT3216A063R2400A
SMD-40℃~+105℃ 0.55mm 1.55mm 1.69dBi 1W 2 2.45GHz 230MHz 3.05mm 50Ω Patch Antenna SMD Antennas ROHSYAGEOAntennas
README
README.mdWtrack
Wtrack — a multi-network location tracker device
Wtrack is a tracker with a combination of Apple Find My, Hubble (terrestrial + satellite), GPS, and BLE proximity detection on one barebones PCB (no enclosure) which goes inside your wallet. I want it to be barebone because I wanted to be able to see the actual PCB because it looks cool ,But I am planning to add a layer acrylic spray that I already have available to prevent water from affecting the board.
Schematic
PCB
3D view
Battery Cap
Bill Of Materials: https://docs.google.com/spreadsheets/d/1D9NDHI8oiGVwoLBUYLz9mFe_7Vkk39w_oN8q6zxxxLU/edit?usp=sharing
Bill of materials (CSV): https://github.com/supisbe12/Wtrack/blob/main/BOM.csv
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 100nF X7R, ±10% | easyeda:C0402 | C7, C8, C12 |
| 3 | LOGO | LOGO | T, T, T |
| 2 | 1.0µF X7R ±10%, 0603 | Capacitor_SMD:C_0603_1608Metric | C14, C15 |
| 2 | 12pF NP0 ±2%, 0402 | easyeda:C0402 | C1, C2 |
| 2 | 4.7uF X7R ±10%, 0603 | Capacitor_SMD:C_0603_1608Metric | C6, C19 |
| 1 | 0.3pF | easyeda:C0201 | C3 |
| 1 | 1.0pF NP0, ±5% | Capacitor_SMD:C_0402_1005Metric | C3_A1 |
| 1 | 1.2P pF NP0, ±5% | Capacitor_SMD:C_0402_1005Metric | C4 |
| 1 | 100 pF NP0, ±5% | Capacitor_SMD:C_0402_1005Metric | C11_NRF1 |
| 1 | 100nF X7R ±10%, 0402 | easyeda:C0402 | C5 |
| 1 | 100Ω | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 10uF | easyeda:C0603 | C19_B1 |
| 1 | 10µH, IDC≥50mA, 0603 | easyeda:L0603 | L2 |
| 1 | 10µH, IDC≥80mA, 0603 | easyeda:L0603 | L4 |
| 1 | 15nH | Inductor_SMD:L_0402_1005Metric | L3 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 2.2nH ±5%, 0402 | easyeda:L0402 | L5 |
| 1 | 220pF +1% | easyeda:C0402 | C11 |
| 1 | 2450LP14A100T | easyeda:FILTER-SMD_0603-6P-L1.6-W0.8_2450LP14A100T | FL1 |
| 1 | 4.7nF X7R ±10% | easyeda:C0402 | C16 |
| 1 | 4.7nH ±5% | Inductor_SMD:L_0402_1005Metric | L1_A1 |
| 1 | 820pF NP0 ±5%, 0402 | Capacitor_SMD:C_0402_1005Metric | C9 |
| 1 | ATGM336H-5N31 | easyeda:GPSM-SMD_ATGM336H-TR | U2 |
| 1 | Bluetooth Antenna | easyeda:ANT-SMD_3P-L3.1-W1.6_ANT3216A063R2400A | L7 |
| 1 | CR2032-BS-6-1 | easyeda:BAT-TH_CR2032-BS-6-1 | B1 |
| 1 | GPS | easyeda:ANT-SMD_L10.0-W3.0 | U1 |
| 1 | KR-5R5C155-R | KR-5R5C155-R:KR5R5C155R | C10 |
| 1 | NRF52840-QIAA-R | easyeda:AQFN-73_L7.0-W7.0-P0.50-BL-EP4.8 | U4 |
| 1 | NX2016SA-32MHZ-STD-CZS-5 | easyeda:OSC-SMD_4P-L2.0-W1.6-BL | X1 |
| 1 | RFX2401C | RFX2401C:QFN50P300X300X60-17N-D | IC1 |
Questions
How big is the Wtracker PCB?
It measures 85.8 × 53.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Wtracker use?
37 parts, built around the ATGM336H-5N31, NRF52840-QIAA-R, RFX2401C and 2450LP14A100T. 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 Wtracker KiCad files?
From the supisbe12/Wtrack repository on GitHub, at the commit this page was made from: the board is Wtracker.kicad_pcb and its schematic GPSmod.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Wtracker design in my own project?
Its repository states no licence, so its author keeps all rights: ask supisbe12 before reusing the design.
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