
Trek Box
tuanthanhhh/trek-safety-system
The system continuously monitors user status and environment, detects abnormal conditions (e.g., fall or unconsciousness), and transmits alerts to a central monitoring station via LoRa communication.

Standalone LoRa-based real-time off-grid relative GPS navigation for group of up to 5 people. Improved version of LRNS Eleph
Spoke is an open-source printed circuit board by FeruzTopalov, from the FeruzTopalov/spoke repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 50 × 100 mm with 143 parts on 127 nets, routed with 1,089 tracks and 587 vias.
It is built around the STM32F103C8T6, E104-BT5005A and E22-400M22S, with the CP2102N-A02-GQFN28, LM3671MF-3.3 and 74HC4052PW among its other parts. Its parts include 41 resistors, 36 capacitors, 12 connectors, 7 ICs and 6 diodes. It belongs with the radio and wireless boards and the STM32 boards of this library.
Designed in KiCad version 9.0.4
PCB stack-up: 100 x 50 mm, typical FR-4, 2 layers, 1 o.z., 1.6 mm thickness, 0.2 mm track/clearance, 0.3/0.6 mm via
See PRODUCTION folder for:
| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | Pad-Round | Spoke:Pad_round | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18 +2 |
| 17 | 100nF | Spoke:C0603 | C3, C4, C10, C11, C16, C17, C18, C20, C21, C22, C23, C27, C30, C31, C33, C35 +1 |
| 14 | 100kR | Spoke:R0603 | R7, R9, R11, R13, R14, R15, R17, R23, R28, R30, R32, R33, R34, R37 |
| 9 | 1kR | Spoke:R0603 | R8, R10, R12, R22, R24, R26, R27, R29, R31 |
| 6 | 0R | Spoke:R0603 | R2, R18, R19, R20, R35, R36 |
| 5 | 10uF | Spoke:C1206 | C1, C5, C8, C13, C34 |
| 5 | 47uF | Spoke:C_tantA | C14, C25, C26, C28, C29 |
| 5 | ~ | Spoke:Button_6x6 | SW1, SW2, SW3, SW4, SW5 |
| 4 | 3.9kR | Spoke:R0603 | R4, R21, R40, R41 |
| 4 | AO3400 | Spoke:SOT-23 | Q3, Q4, Q5, Q6 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 4.7uF | Spoke:C0805 | C2, C7, C32 |
| 3 | BAT54C | Spoke:SOT-23 | D1, D3, D6 |
| 2 | 12pF | Spoke:C0603 | C15, C19 |
| 2 | 300R | Spoke:R0603 | R25, R38 |
| 2 | 5.1kR | Spoke:R0603 | R1, R3 |
| 2 | AO3407A | Spoke:SOT-23 | Q1, Q2 |
| 2 | PLS-1x3 | Spoke:Header_1x3 | J7, J9 |
| 2 | Red | Spoke:LED_3mm | D2, D4 |
| 2 | ~ | Spoke:C0603 | C9, C12 |
| 1 | 100R | Spoke:R1206 | R39 |
| 1 | 2.2uH | Spoke:L1616 | L1 |
| 1 | 22.1kR | Spoke:R0603 | R5 |
| 1 | 220nF | Spoke:C0603 | C36 |
| 1 | 47.5kR | Spoke:R0603 | R6 |
| 1 | 74HC4052PW | Spoke:TSSOP-16 | U5 |
| 1 | 80 mF Supercap | Spoke:XH414HG-IV01E | C24 |
| 1 | 8MHz | Spoke:Xtal_3225 | X1 |
| 1 | Amphenol 132289 | Spoke:SMA | J12 |
| 1 | B2B-PH-K-S | Spoke:B2B-PH-2.0 | J1 |
| 1 | BAT+ | Spoke:Pad_oval | J2 |
| 1 | BAT- | Spoke:Pad_oval | J3 |
| 1 | BL-A | Spoke:Pad_oval | J10 |
| 1 | BL-C | Spoke:Pad_oval | J11 |
| 1 | Buzzer-Passive | Spoke:Buzzer | LS1 |
| 1 | CP2102N-A02-GQFN28 | Spoke:QFN-28 | U3 |
| 1 | E104-BT5005A | Spoke:E104-BT5005A | A1 |
| 1 | E22-400M22S | Spoke:E22 | A2 |
| 1 | G10A-F30 | Spoke:G10A-F30 | A4 |
| 1 | GCT USB4105/USB4110 | Spoke:USB_C_16p_GCT4105 | J4 |
| 1 | GM12864-01A | Spoke:GM12864-01A | A3 |
| 1 | Green | Spoke:LED_3mm | D5 |
| 1 | LM3671MF-3.3 | Spoke:SOT-23-5 | U4 |
| 1 | LSM303DLHC | Spoke:LGA-14 | U7 |
| 1 | PLS-1x6 | Spoke:Header_1x6 | J8 |
| 1 | SP0503BAHTG | Spoke:SOT-143 | U1 |
| 1 | STM32F103C8T6 | Spoke:LQFP-48 | U6 |
| 1 | TP4056 | Spoke:SOIC-8-EP | U2 |
| 1 | TU10-F | Spoke:TU10-F | A5 |
| 1 | USB+ | Spoke:Pad_oval | J5 |
| 1 | USB- | Spoke:Pad_oval | J6 |
| 1 | ~ | Spoke:R0603 | R16 |

tuanthanhhh/trek-safety-system
The system continuously monitors user status and environment, detects abnormal conditions (e.g., fall or unconsciousness), and transmits alerts to a central monitoring station via LoRa communication.

FeruzTopalov/eleph
GPS-based local relative navigation system for group of up to 6 members




NilsEngelbach/air-quality-pcb
Seventh iteration: ESP8266 → ESP32-C3 (native USB, no UART bridge), fixes from the v6 design review, right-angle switches with longer actuators, a STEMMA QT port for optional sensors, and charge-status sensing.

Boardoza/Boardoza_E22-900M22S_Long_Range_LoRa_Breakout_Board
Long-range LoRa® breakout board based on the Ebyte E22-900M22S and Semtech SX1262 transceiver.

PTR-projects/PTR_mega_hardware
Welcome to the KPPTR-hardware repository! This repository contains the design files for the hardware components used in the KPPTR project.
It measures 50 × 100 mm and has 2 copper layers, 1.6 mm thick.
143 parts, built around the STM32F103C8T6, E104-BT5005A, E22-400M22S and CP2102N-A02-GQFN28. 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.
From the FeruzTopalov/spoke repository on GitHub, at the commit this page was made from: the board is KiCad/Spoke.kicad_pcb and its schematic KiCad/Spoke.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).