2 layers26.8 × 21.3 mm
2 layers59.3 × 24.5 mm
PDR draft of SDP final report
- Size
- 59.3 × 24.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 63
- Pads
- 138
- Tracks, vias
- 376, 31
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 13 Oct 2024
- Updated
- 1 Mar 2025
Overview
Anchor is an open-source printed circuit board by WaltTeb, from the WaltTeb/BareTag_Tool_Tracker repository on GitHub. It is a 2-layer board of 59.3 × 24.5 mm with 35 parts on 63 nets, routed with 376 tracks and 31 vias.
It is built around the IRLML2402TRPBF, LTST-C235KGKRKT and S2B-PH-SM4-TB(LF)(SN), with the TL3315NF160Q among its other parts. Its parts include 8 resistors, 7 capacitors, 7 connectors, 3 ICs and 3 diodes.
Main components
4
IRLML2402TRPBF
SOT-23-55℃~+150℃ 1 N-channel 1.2A 20V 250mΩ@4.5V 300pF 4nC@4.5V 540mW 700mV 80pF 90pF SOT-23 MOSFETs ROHSTECH PUBLICMOSFETs
LTST-C235KGKRKT
SMD-4P,3.2x1.6mm-30℃~+85℃ 130° 2V、2V 571nm、631nm 574nm、639nm 75mW Discrete Diode Red, Yellow Green Reverse Mount Water Clear SMD-4P,3.2x1.6mm LED Indication - Discrete ROHSLite-OnLED Indication - Discrete
S2B-PH-SM4-TB(LF)(SN)
SMD,P=2mm,卧贴-25℃~+85℃ 1 100V 1x2P 2 2A 2P 2mm 5.5mm 7.9mm 8.6mm Auxiliary Solder Pin Beige Copper alloy PA PH Surface Mount, Right Angle Tin UL94V-0 SMD,P=2mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
TL3315NF160Q
SMD-4P,4.5x4.5mm-20℃~+70℃ 0.55mm 1.6N 12V 4.5mm 4.5mm 500,000 Cycles 50mA Gull Wing Round Button SPST Surface Mount,Vertical Without Bracket Yellow SMD-4P,4.5x4.5mm Tactile Switches ROHSE-SwitchTactile Switches
README
README.mdBaretag Tool-Tracker
Item locating and theft prevention system built around the DWM3001C using Ultra Wideband, BLE, and LoRa technologies.
Hardware
Qorvo DWM3001C - UWB & BLE SoC using nRF52833 and Qorvo DWM3000
Reyax RYLR998 - LoRa
3.7V 290mAh LiPo - Tag Battery
3.7 2200mAh LiIon - Anchor Battery
CP2102 Serial Converter - LoRa to Serial
Raspberry Pi 4B - Host for Lora processing
Dell NUC - Host for servers
Tag-Connect Edge-Connect Programmer - Programming Tag PCBs
SEGGER JLink Edu Mini - Programming Anchor PCBs
Software
SEGGER Embedded Studio - Build environement
nRF5 SDK - Nordic libraries for nRF52833
Xcode - UI/UX
Debian Linux - Light distro for NUC
J-Flash Lite - Flashing firmware to DWM3001C
SQLite - Database management
Electron - App development
KiCad - PCB design
Setup
Run the shell script that we have yet to make in order to install project dependencies This will create a working project development environment
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | TSM-102-01-X-SV | TSM_102_01_L_SV:SAMTEC_TSM-102-01-X-SV | J1, J4, J5, J7, J8 |
| 2 | 100K | RC0402FR_07100KL:RESC1005X40 | R2, R4 |
| 2 | 10uF | GRM155R60J106ME05D:CAPC1005X70N | C3, C4 |
| 2 | 1K5 | RT0402BRD071K5L:RESC1005X35N | R1, R3 |
| 2 | 1k8 | RK73B1ETTP182J:RESC1005X40N | R7, R8 |
| 2 | IRLML2402TRPBF | Package_TO_SOT_SMD:SOT-23-3 | Q1, Q2 |
| 2 | LED | 150060RS75000:WL-SMCW_0603 | D2, D3 |
| 2 | Murata BLM15EG121SN1D | BLM15EG121SN1D:BEADC1005X55N | B1, B2 |
| 2 | TestPoint | TestPoint:TestPoint_Keystone_5015_Micro-Minature | TP2, TP3 |
| 1 | .1uF | GRM155R71C104KA88J:CAPC1005X55N | C5 |
| 1 | 100nF | Capacitor_SMD:C_0201_0603Metric | C8 |
| 1 | 150K | RC0402FR_07150RL:RESC1005X40N | R5 |
| 1 | 2.2uF | GRM155C80J225KE95D:CAPC1005X55N | C2 |
| 1 | 47pF | GRM1555C1H470JA01D:CAPC1005X55N | C6 |
| 1 | 820K | RC0402FR_07820KL:RESC1005X40N | R6 |
| 1 | C | GRM155C80J225KE95D:CAPC1005X55N | C1 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J2 |
| 1 | LTST-C235KGKRKT | APHBM2012LSURKSYKC:LED_APHBM2012LSURKSYKC | D1 |
| 1 | LYR998 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | U3 |
| 1 | S2B-PH-SM4-TB_LF__SN_ | S2B_PH_SM4_TB:JST_S2B-PH-SM4-TB | J3 |
| 1 | TL3315NF160Q | TL3315NF160Q:SW_TL3315NF160Q | S1 |
| 1 | Voltage Regulator | TPS79933DDCR (2):volt_reg | U1 |
| 1 | ` | Altium:DWM3001C | U2 |
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Questions
How big is the Anchor PCB?
It measures 59.3 × 24.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Anchor use?
35 parts, built around the IRLML2402TRPBF, LTST-C235KGKRKT, S2B-PH-SM4-TB(LF)(SN) and TL3315NF160Q. 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 Anchor KiCad files?
From the WaltTeb/BareTag_Tool_Tracker repository on GitHub, at the commit this page was made from: the board is PCB/anchor/anchor.kicad_pcb and its schematic PCB/anchor/anchor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Anchor design in my own project?
Its repository states no licence, so its author keeps all rights: ask WaltTeb before reusing the design.