Fairank/WhisperTorch声束手电 · A directional-audio engineering prototype with editable KiCad PCBs, a serviceable 3D-printable enclosure and ESP32/Pico firmware. Source-available for noncommercial use; range targets remain unverified.
DA37 power C is an open-source printed circuit board by Fairank, from the Fairank/WhisperTorch repository on GitHub. It is a 4-layer board with 83 parts on 52 nets, routed with 842 tracks and 88 vias.
It is built around the INA226AIDGSR, BQ29209DRBR and S-8252AAY-M6T1U, with the VOM617A-4X001T, CSD17577Q5A and AO4407A among its other parts. Its parts include 31 resistors, 20 capacitors, 10 connectors, 7 transistors and 6 ICs.
Fairank 的便携式定向声音工程项目。 以手电筒的形态探索无需接收器的定向语音：两节 18650、USB-C 充电、尾部麦克风与中文菜单、实时讲话和 30 秒断电保存录音。
当前：C3 工程样机设计，源码公开 / 非商业许可。 这是一套可编辑的 PCB、结构和固件工程，尚未制造或完成实物测试。目标“60 米普通户外听懂”和“30 米处近似瓶口大小的声音束”均未实现或验证；现有 37 单元发射头只是开发平台，可能需要重新设计口径、供电和结构。
按 2026-09-09 最新确认，后续主方案固定为 37 个，1＋6＋12＋18 四圈，88 个草案已撤回。高输出版先核验换能器和驱动匹配，详见 37 单元改版研究与尺寸对照。该目录是选型与排布研究，当前可编辑电路和外壳仍为下列 C3 基线。
| 部分 | 已有内容 | 验证边界 |
|---|---|---|
| 电路 | 电源、控制、尾部、37 单元发射四块已布线 KiCad 板及原理图 | C3 四板 DRC / 未连接 / 原理图一致性均为 0；电路基础 696 个接线点一致；无实测 |
| 外壳 | 圆形前端、圆角矩形后部、平滑过渡；一体主壳，两端可拆板组 | 14 种 STL 闭合且单一实体；9 项名义装配几何检查通过；无打印首件 |
| 音频与界面 | ESP32 + Pico；实时语音、30 秒录音、单次/循环、蓝牙音频、中文菜单 | 源码和编译检查；无实机音频效果证据 |
| 电源 | 2S 18650，Type-C 充电，保护与温度/电流检测 | 显示的是整机直流电功率，不是声功率；充电和发射负载待实测 |
| 品牌 | 年糕 Niangao v1 + Fairank，和 FieldDock 统一 | 三块板有猫头像，四板有署名；细节印刷待工厂确认 |
.kicad_pro，本地符号和封装在 libraries/。外形：前端最大 Ø102 mm，握柄 68×50 mm，总长 170 mm（含键帽约 171.6 mm）。主壳可以一体打印，前后盖与侧检修盖保持可拆；整个机壳封死为一件无法安装内部组件。
按 2026-09-09 中国采购的一台开发样机，现版预算约 ¥2,700–3,800，不含仪器、专业测试和返工。¥1,200–2,400 是换能器与廉价 OLED 替换验证后的条件目标，尚不是可采购配置。详见价格模型中的出处、假设和未完成替换。
下一阶段先锁定器件和线束，验证打印首件、充电保护、温升及音频联调，再测声压、横向覆盖与 10/30/60 米语音辨识。不能仅凭板图无错误宣布制造放行或远距离达标。
自有贡献按 Fairank Noncommercial Project License 1.0 免费供非商业学习、修改、分享与个人制作使用；商业使用须另获书面许可。中文说明。这是源码公开项目，不是允许商业使用的 OSI 开源项目。第三方内容保留原许可，见 THIRD_PARTY_NOTICES.md。
WhisperTorch is an AI-assisted hardware engineering project by Fairank: editable KiCad electronics, a serviceable flashlight-shaped enclosure, and ESP32/Pico firmware for directional speech experiments. The 60 m outdoor speech and near-bottle-width beam are unmet, unverified requirements, not product specifications. No physical prototype validation or manufacturing release is claimed. Project-owned material is available for noncommercial use under the custom license; upstream materials retain their original licenses.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100k | Resistor_SMD:R_0603_1608Metric | R9, R11, R15, R26, R27, R28, R29 |
| 6 | 22u/25V X7R | Capacitor_SMD:C_1210_3225Metric | C12, C13, C14, C15, C16, C17 |
| 5 | 100n | Capacitor_SMD:C_0603_1608Metric | C7, C8, C9, C19, C20 |
| 5 | 100n/25V | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5 |
| 3 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q3, Q6, Q7 |
| 3 | M3 | DA37:Mount_M3 | H1, H2, H3 |
| 2 | 100R | Resistor_SMD:R_0603_1608Metric | R7, R8 |
| 2 | 10R | Resistor_SMD:R_0603_1608Metric | R13, R14 |
| 2 | 4.7u/16V | Capacitor_SMD:C_0805_2012Metric | C11, C18 |
| 2 | 470R | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 5.1k 1% | Resistor_SMD:R_0603_1608Metric | R17, R18 |
| 2 | CSD17577Q5A | Package_SON:VSONP-8-1EP_5x6_P1.27mm | Q1, Q2 |
| 1 | 0451008.MRL 8A | DA37:Fuse_451 | F1 |
| 1 | 1.21k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 1.91k | Resistor_SMD:R_0603_1608Metric | R21 |
| 1 | 100k 0.1% | Resistor_SMD:R_0603_1608Metric | R31 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 10k 1% | Resistor_SMD:R_0603_1608Metric | R32 |
| 1 | 10m/3W 1% | Resistor_SMD:R_2512_6332Metric | R4 |
| 1 | 120k 0.1% | Resistor_SMD:R_0603_1608Metric | R30 |
| 1 | 160R | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R19 |
| 1 | 260R | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 2k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 30.1k | Resistor_SMD:R_0603_1608Metric | R23 |
| 1 | 330n/25V | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | 47k | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 47n/25V | Capacitor_SMD:C_0603_1608Metric | C10 |
| 1 | 5.23k | Resistor_SMD:R_0603_1608Metric | R22 |
| 1 | 560R | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 5m/3W 1% | Resistor_SMD:R_2512_6332Metric | R12 |
| 1 | AO4407A | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | Q4 |
| 1 | BAL_OV | DA37:Wire_signal | TP1 |
| 1 | BQ25886RGER | Package_DFN_QFN:Texas_RGE0024H_VQFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U5 |
| 1 | BQ29209DRBR | Package_DFN_QFN:Texas_DRB0008A | U2 |
| 1 | CELL_M | DA37:Wire_signal | J2 |
| 1 | CELL_N | DA37:Wire_18AWG | J3 |
| 1 | CELL_P | DA37:Wire_18AWG | J1 |
| 1 | CHG_CE | DA37:Wire_signal | TP2 |
| 1 | CHG_STAT | DA37:Wire_signal | TP3 |
| 1 | GND | DA37:Wire_18AWG | J8 |
| 1 | INA226AIDGSR | Package_SO:VSSOP-10_3x3mm_P0.5mm | U4 |
| 1 | LOAD_BUS | DA37:Wire_18AWG | J7 |
| 1 | MAIN SWITCH | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q5 |
| 1 | NTC 103AT-2 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J11 |
| 1 | NTC RUN 103AT-2 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J12 |
| 1 | Niangao_v1_24mm | Niangao_v1_24mm | LOGO_NIANGAO |
| 1 | POWER CONTROL FFC | Connector_FFC-FPC:Hirose_FH12-20S-0.5SH_1x20-1MP_P0.50mm_Horizontal | J9 |
| 1 | S-8252AAY-M6T1U | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | TLV7031DBVR | Package_TO_SOT_SMD:SOT-23-5 | U6 |
| 1 | USB4105-GF-A | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J10 |
| 1 | VOM617A-4X001T | DA37:VOM617A_SOP4 | U3 |
| 1 | XAL6030-102MEC | Inductor_SMD:L_Coilcraft_XAL6030-XXX | L1 |
Fairank/WhisperTorch
声束手电 · A directional-audio engineering prototype with editable KiCad PCBs, a serviceable 3D-printable enclosure and ESP32/Pico firmware. Source-available for noncommercial use; range targets remain unverified.
Fairank/WhisperTorch
声束手电 · A directional-audio engineering prototype with editable KiCad PCBs, a serviceable 3D-printable enclosure and ESP32/Pico firmware. Source-available for noncommercial use; range targets remain unverified.
Fairank/WhisperTorch
声束手电 · A directional-audio engineering prototype with editable KiCad PCBs, a serviceable 3D-printable enclosure and ESP32/Pico firmware. Source-available for noncommercial use; range targets remain unverified.
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83 parts, built around the INA226AIDGSR, BQ29209DRBR, S-8252AAY-M6T1U and VOM617A-4X001T. 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 Fairank/WhisperTorch repository on GitHub, at the commit this page was made from: the board is pcb/DA37_power_C.kicad_pcb and its schematic pcb/DA37_control_C.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Fairank before reusing the design.
