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google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards

Build farm automation and remote management
Stingray is an open-source printed circuit board by amclain, from the amclain/stingray repository on GitHub. It is a 2-layer board of 77 × 54.6 mm with 15 parts on 94 nets, routed with 40 tracks and 0 vias.
It is built around the MPSA29. Its parts include 3 resistors, 3 connectors, 2 capacitors, 1 diode and 1 transistor.
Build farm automation and remote management.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | BeagleBone_Black_Header | Socket_BeagleBone_Black:Socket_BeagleBone_Black | P8, P9 |
| 1 | 1M | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 1N4001 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D1 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2 |
| 1 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 470u | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C1 |
| 1 | DNP | Capacitor_THT:CP_Radial_D8.0mm_P5.00mm | C2 |
| 1 | G6RL-1 | am_omron:G6RL-1 | K1 |
| 1 | MPSA29 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | Target Board | Connector_Phoenix_MC:PhoenixContact_MC_1,5_4-G-3.81_1x04_P3.81mm_Horizontal | J1 |
It measures 77 × 54.6 mm and has 2 copper layers, 1.6 mm thick.
15 parts, built around the MPSA29. 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 amclain/stingray repository on GitHub, at the commit this page was made from: the board is schematics/stingray.kicad_pcb and its schematic schematics/stingray.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 amclain before reusing the design.

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