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

In the schematic, R1 which determines the fixed off-time is set 25kΩ. However, the BOD lists the URL for 30kΩ because I could not find the one with 25kΩ.
A3982slb board is an open-source printed circuit board by wshito, from the wshito/Micromouse2017 repository on GitHub. It is a 2-layer board of 21.3 × 40.9 mm with 16 parts on 21 nets, routed with 134 tracks and 16 vias.
Its parts include 7 capacitors, 4 resistors, 2 connectors and 1 IC.
a3982slb_board.pro: The main project file for KiCAD.a3982slb_board.sch: KiCAD schematic file.a3982slb_board.kicad_pcb: KiCAD pcb file.a3982slb_board-cache.lib: KiCAD cache for parts library.output: Contains biproducts from the KiCAD project.
In the schematic, R1 which determines the fixed off-time is set 25kΩ. However, the BOD lists the URL for 30kΩ because I could not find the one with 25kΩ. This makes the fixed off-time approximately 6.060606us longer and becomes about 36.363636us.
a3982slb_board.pro: KiCAD用プロジェクトファイル.a3982slb_board.sch: KiCAD用回路図ファイル.a3982slb_board.kicad_pcb: KiCAD用基盤レイアウトファイル.a3982slb_board-cache.lib: KiCAD cache for parts library.output: KiCADプロジェクトから生成したファイルを格納.
回路図では,固定OFF時間を決める R1 は 25kΩ になっているが,部品が見つけられなかったので,BOD では 30kΩ の入手先を記載している.これにより,固定時間が約 6.060606μ 秒長くなり 36.363636μ 秒になる.ちなみに 25kΩなら約 30.30303μ 秒である.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 0.22u | Capacitors_SMD:C_0603_HandSoldering | C2, C5, C7 |
| 2 | 0.1u | Capacitors_SMD:C_0603_HandSoldering | C1, C3 |
| 2 | 0.33 | Resistors_SMD:R_2512_HandSoldering | R1, R2 |
| 1 | 100u | wshito_FootPrints:UCB1H101MNL1GS_HandSoldering | C4 |
| 1 | 10K | wshito_FootPrints:G43A | RV1 |
| 1 | 10u | Capacitors_SMD:C_0603_HandSoldering | C6 |
| 1 | 2.4K | Resistors_SMD:R_0603_HandSoldering | R4 |
| 1 | 25K | Resistors_SMD:R_0603_HandSoldering | R3 |
| 1 | A3982 | Housings_SOIC:SOIC-24W_7.5x15.4mm_Pitch1.27mm | U1 |
| 1 | CONN_01X06 | Pin_Headers:Pin_Header_Straight_1x06 | P2 |
| 1 | CONN_01X07 | Pin_Headers:Pin_Header_Straight_1x07 | P1 |
| 1 | TEST_1P | Connectors:PINTST | Test |
It measures 21.3 × 40.9 mm and has 2 copper layers, 1.6 mm thick.
16 parts. 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 wshito/Micromouse2017 repository on GitHub, at the commit this page was made from: the board is prototype/a3982slb_board/kicad/a3982slb_board/a3982slb_board.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask wshito before reusing the design.

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

conorpp/u2f-zero
U2F USB token optimized for physical security, affordability, and style

rusefi/rusefi
rusefi - GPL internal combustion engine control unit

VoronDesign/Voron-Hardware
Cool Hardware designed by the Voron Design group

hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI

hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!

