2 layers362 × 150.6 mm
Wavelength v0.0
ayan20985/wavelength-keyboard
the wavelength keyboard is a custom ortholinear bluetooth mechanical keyboard
731 parts1MIT
2 layers229.6 × 77.2 mm
Bdkb40
msorair/bdkb40- Size
- 229.6 × 77.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 122
- Nets
- 97
- Pads
- 640
- Tracks, vias
- 837, 63
- Pours
- 92
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Dec 2025
- Updated
- 20 Mar 2026
Overview
Bdkb40 is an open-source printed circuit board by msorair, from the msorair/bdkb40 repository on GitHub. It is a 2-layer board of 229.6 × 77.2 mm with 122 parts on 97 nets, routed with 837 tracks and 63 vias.
It is built around the BQ24075RGT and 1N4148WS. Its parts include 43 diodes, 13 capacitors, 11 resistors, 4 connectors and 4 switches. It belongs with the nRF52 and nRF5x boards of this library.
Main components
2
BQ24075RGT
QFN-16-EP(3x3)-40℃~+125℃ 1.5A 4.2V 4.35V~6.4V 6.5uA Charging IC Lithium Battery Not supported Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
Parts
122| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | 1N4148WS | Diode_SMD:D_SOD-323 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 6 | 4u7 | Capacitor_SMD:C_0402_1005Metric | C1, C2, C4, C7, C10, C11 |
| 4 | 1u | Capacitor_SMD:C_0402_1005Metric | C3, C5, C8, C9 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R3, R7, R8 |
| 3 | 1k | Resistor_SMD:R_0402_1005Metric | R9, R10, R11 |
| 2 | 12p | Capacitor_SMD:C_0402_1005Metric | C12, C13 |
| 2 | Ctrl | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.25u | MX37, MX44 |
| 2 | Super | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX38, MX43 |
| 1 | , | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX33 |
| 1 | . | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX34 |
| 1 | 10 uH | Inductor_SMD:L_0603_1608Metric | L2 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R12 |
| 1 | 100n | Capacitor_SMD:C_0402_1005Metric | C6 |
| 1 | 1k5 | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 2k2 | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | 32.768 KHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | Y1 |
| 1 | 470k | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 47k | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 78171-0002 | PCM_marbastlib-various:Molex_Pico-EZmate_78171-0002_1x02-1MP_P1.20mm_Vertical | J2 |
| 1 | 78171-0004 | Connector_Molex:Molex_Pico-EZmate_78171-0004_1x04-1MP_P1.20mm_Vertical | J6 |
| 1 | A | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX14 |
| 1 | Alt | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.25u | MX39 |
| 1 | B | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX30 |
| 1 | BQ24075 | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U2 |
| 1 | BS | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX12 |
| 1 | C | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX28 |
| 1 | Caps | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.25u | MX13 |
| 1 | D | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX16 |
| 1 | DFU | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW3 |
| 1 | E | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX4 |
| 1 | ESC | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX1 |
| 1 | F | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX17 |
| 1 | FRST | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW2 |
| 1 | Fn | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.25u | MX42 |
| 1 | G | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX18 |
| 1 | H | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX19 |
| 1 | I | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX9 |
| 1 | IND | PCM_marbastlib-various:LED_1206R | LED1 |
| 1 | J | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX20 |
| 1 | K | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX21 |
| 1 | L | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX22 |
| 1 | M | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX32 |
| 1 | MAX17048 | bdkb:DFN-8-1EP_2x2mm_P0.5mm_EP0.7x1.3mm | U3 |
| 1 | N | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX31 |
| 1 | O | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX10 |
| 1 | P | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX11 |
| 1 | Q | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX2 |
| 1 | R | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX5 |
| 1 | RST | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW1 |
| 1 | S | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX15 |
| 1 | SWD | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | SW_SP3T_TA3517A1 | Button_Switch_SMD:SW_SP3T_PCM13 | SW4 |
| 1 | Shift | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.75u | MX25 |
| 1 | Shift | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.25u | MX35 |
| 1 | Space | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_2.25u | MX40 |
| 1 | Space | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_2.75u | MX41 |
| 1 | T | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX6 |
| 1 | U | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX8 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | V | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX29 |
| 1 | W | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX3 |
| 1 | X | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX27 |
| 1 | Y | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX7 |
| 1 | Z | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1u | MX26 |
| 1 | \ | PCM_marbastlib-mx:SW_MX_HS_CPG151101S11_1.75u | MX23 |
| 1 | nRF52840_E73-2G4M08S1C | PCM_marbastlib-various:nRF52840_E73-2G4M08S1C | U4 |
Questions
How big is the Bdkb40 PCB?
It measures 229.6 × 77.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bdkb40 use?
122 parts, built around the BQ24075RGT and 1N4148WS. 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.
Where can I download the Bdkb40 KiCad files?
From the msorair/bdkb40 repository on GitHub, at the commit this page was made from: the board is hardware/bdkb40.kicad_pcb and its schematic hardware/bdkb40.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bdkb40 design in my own project?
Its repository states no licence, so its author keeps all rights: ask msorair before reusing the design.
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