HenraL/panic_buttonThis is an attempt at creating a box that aims to allow you to broacast your location to someone close like the other deivces (air tag, tile, etc) but as it is not a brand and uses the internet instead of ble and an proprietary device grid (airtag) it should not be very obvious.
Panic button is an open-source printed circuit board by HenraL, from the HenraL/panic_button repository on GitHub, published under the MIT licence. It is a 2-layer board with 43 parts on 142 nets.
It is built around the ESP32-C3-DEVKITM-1, SIM7600G-H and BD33GA5WEFJ-E2, with the SS14 and 1206L050/15YR among its other parts. Its parts include 14 resistors, 11 diodes, 6 capacitors, 5 switches and 3 ICs. It belongs with the ESP32 and RISC-V boards of this library.
A small panic beacon (target: no bigger than a finger; a palm if that size can't be reached) that:
Apple UWB is out of reach (proprietary Apple U1/U2 chip + MFi program) — phone interaction is BLE only. Cost target: < $50 / unit (excluding the IoT/SIM plan).
AGENTS.md — rules and conventions for AI agents and contributors; read it first.KiCad/v1/panic_button — first board attempt (archive).KiCad/v2/dev/panic_button_dev — dev variant of the v2 circuit.KiCad/v2/tiny/panic_button_tiny — active design (KiCad 10): the tiny variant,
as small as possible.KiCad/v2/tiny/bom.md — live bill of materials (strictly the BOM).KiCad/v2/tiny/design.md — design decisions, notes and open questions.platformio/ — firmware (PlatformIO + Arduino on ESP32-C3). Comes after the circuit
planning, not in parallel.bonus/ — tools / environments / scratch (bonus/tmp/).See bom.md for parts and prices, design.md for decisions.
MIT — see LICENSE.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R8, R9, R12 |
| 4 | 330Ω | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R7, R10, R11 |
| 3 | 100nF_Ceramic | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C2, C3, C5 |
| 3 | Push_Button | Button_Switch_THT:SW_PUSH_6mm | SW1, SW2, SW5 |
| 3 | SS14 | Diode_SMD:D_SMA | D1, D3, D8 |
| 2 | 10k_0402 | Resistor_SMD:R_0402_1005Metric | R1, R14 |
| 2 | JST_02 | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J1, J2 |
| 2 | LED green | LED_THT:LED_D5.0mm | D7, D9 |
| 2 | LED red | LED_THT:LED_D5.0mm | D4, D10 |
| 2 | Slide_Switch_SPDT_P3mm_10x5x10mm | PCM_SL_Devices:Slide_Switch_SPDT_P3mm_10x5x10mm | SW3, SW4 |
| 1 | 1000uF_25V | Capacitor_THT:CP_Radial_D13.0mm_P5.00mm | C4 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R13 |
| 1 | 100pF_0603_50V | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 1206L050/15YR | footprints:1206LSeries_LTF | F1 |
| 1 | 15kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4 |
| 1 | 1N6284A | PCM_Diode_THT_AKL:D_DO-201_P12.70mm_Horizontal_Zener | D2 |
| 1 | 20kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R5 |
| 1 | 27kΩ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 470pF_0603_25V | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | BD33GA5WEFJ | Package_SO:HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.4x3.2mm | U1 |
| 1 | ESP32-C3-DevKitM-1 | RF_Module:ESP32-C3-DevKitM-1 | U2 |
| 1 | LED blue | LED_THT:LED_D5.0mm | D11 |
| 1 | LED orange | LED_THT:LED_D5.0mm | D5 |
| 1 | LED yellow | LED_THT:LED_D5.0mm | D6 |
| 1 | SIM7600G-H | KiCad:SIM7600GH | IC1 |
| 1 | potentiometer_RM065 | PCM_SL_Devices:Potentiometer_RM065 | RV1 |
43 parts, built around the ESP32-C3-DEVKITM-1, SIM7600G-H, BD33GA5WEFJ-E2 and SS14. 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 HenraL/panic_button repository on GitHub, at the commit this page was made from: the board is KiCad/v1/panic_button/panic_button.kicad_pcb and its schematic KiCad/v1/panic_button/panic_button.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
HenraL/panic_button
This is an attempt at creating a box that aims to allow you to broacast your location to someone close like the other deivces (air tag, tile, etc) but as it is not a brand and uses the internet instead of ble and an…
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