8 layers120 × 60 mm
Jetson orin baseboard
antmicro/jetson-orin-baseboard
Baseboard targetting the NVIDIA Jetson Orin Nano and Jetson Orin NX
681 parts305Apache-2.0
2 layers303.5 × 99.7 mm
Wireless split keyboard
- Size
- 303.5 × 99.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 136
- Nets
- 100
- Pads
- 616
- Tracks, vias
- 704, 21
- Pours
- 536
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 4 May 2024
- Updated
- 5 Nov 2025
Overview
L4 is an open-source printed circuit board by object1037, from the object1037/L4 repository on GitHub. It is a 2-layer board of 303.5 × 99.7 mm with 136 parts on 100 nets, routed with 704 tracks and 21 vias.
It is built around the CR2032 and SSM3J332R,LF. Its parts include 56 diodes, 54 switches, 2 capacitors, 2 ICs and 2 transistors. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
Main components
2README
README.mdL4
The L4 is a 50% wireless split keyboard with an ortholinear layout.
- Keys: 52
- Switch: Choc V2 / MX
- Power: LiPo / CR2032
- Mount: Gasket / M2
BOM
- Seeed XIAO BLE nRf52840 x 2
- Switch x 52
- Keycap x 52
- Diode(SOD123) x 52
- DP3T switch(SK23D07) x 2
CR2032
- CR2032 battery x 4
- CR2032 holder(BC-2001) x 4
- Schottky diode(SOD123) x 4
- Capacitor(100uF, 3216) x 2
- PMOS(SSM3J332R) x 2
LiPo
- LiPo battery x 2
- PH connector(side) x 2
Acrylic case
- Case x 1
- M2 spacer
- 1.6-2mm x 6
- 3.5mm x 8
- 6mm x 12
- M2 screw
- 5mm x 10
- 8mm x 6
- 10mm x 8
Parts
136| Qty | Value | Footprint | References |
|---|---|---|---|
| 52 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +36 |
| 52 | SW_Push | kbd:keyswitch_cherrymx_choc12_1u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +36 |
| 4 | CR2032 | Battery:BatteryHolder_Multicomp_BC-2001_1x2032 | BT1, BT2, BT3, BT4 |
| 4 | D_Schottky | Diode_SMD:D_SOD-123 | D27, D28, D55, D56 |
| 2 | 100u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2 |
| 2 | JST_PH | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J1, J2 |
| 2 | LOGO | LOGO | G***, G*** |
| 2 | SSM3J332R | Package_TO_SOT_SMD:SOT-23-3 | Q1, Q2 |
| 2 | SW_DP3T | akizuki:SK23D07 | SW27, SW54 |
| 2 | XIAO nRF52840 | akizuki:XIAO_nrf52840 | U1, U2 |
The 124 most common of 136 parts.
Questions
How big is the L4 PCB?
It measures 303.5 × 99.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the L4 use?
136 parts, built around the CR2032 and SSM3J332R,LF. 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 L4 KiCad files?
From the object1037/L4 repository on GitHub, at the commit this page was made from: the board is hardware/L4.kicad_pcb and its schematic hardware/L4.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the L4 design in my own project?
Its repository states no licence, so its author keeps all rights: ask object1037 before reusing the design.
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