2 layers17.3 × 26.1 mm
Usb adapter long
weteor/LuttUnLutt
Lütt Un Lütt is a small 3x5+2 split ortho keyboard with encoder
10 parts70CERN-OHL-P-2.0
2 layers111.5 × 76.8 mm
Lul left
weteor/LuttUnLutt70Lütt Un Lütt is a small 3x5+2 split ortho keyboard with encoder
- Size
- 111.5 × 76.8 mm
- Copper layers
- 2
- Thickness
- 1 mm
- Parts
- 54
- Nets
- 62
- Pads
- 257
- Tracks, vias
- 122, 110
- Pours
- 328
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 31 Jan 2023
- Updated
- 25 Feb 2023
Overview
Lul left is an open-source printed circuit board by weteor, from the weteor/LuttUnLutt repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 2-layer board of 111.5 × 76.8 mm with 54 parts on 62 nets, routed with 122 tracks and 110 vias.
It is built around the E73-2G4M08S1C, DW01A and FS8205. Its parts include 20 switches, 17 diodes, 5 capacitors, 4 ICs and 3 resistors.
Main components
3
E73-2G4M08S1C
SMD,18x13mm-103dBm、-95dBm -40℃~+85℃ 120m 17.05mA 3.3V 8.27mA 8dBm Bluetooth 5.0、Bluetooth 4.2 PWM、SPI、ADC、USB、I2C、ISP、JTAG、DMA nRF52840 Chip SMD,18x13mm Bluetooth Modules ROHSChengdu Ebyte Elec TechBluetooth Modules
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery ManagementFS8205
SOT-23-6-55℃~+150℃ 1.2V 1W 2 N-Channel 20V 37mΩ@2.5V 6A N-Channel SOT-23-6 MOSFETs ROHSFORTUNEMOSFETs
README
README.mdLütt un Lütt
3x5+2 key split orthogonal BLE keyboard
Features
- full BLE, powered by coin cells (CR2032)
- choc v1 Hotswap sockets
- encoder
- case files are supplied (stl, dxf, as well as the freecad files)
- ZMK (with dongle support)
- completely open source, permissive license (CERN-OHL-P)
what's left to do?
- fix small hole placement error in case
- fix battery opening in case
- fix cap placement on pcb right
Want one?
All production files you need to build your own board can be found here. they are certainly usable, but the case might need some scraping/cutting to properly fit the battery. I will fix that soon
The case is split in two parts connected by cylindrical 3x1.7mm magnets. The bottom case is open by design and ends at a bit under the hotswap sockets. It's meant to be used with self adhesive neopren sheets (2-3mm thick), which are cut to be the same size as the pcb and then glued on top of the underside of the pcb.
the rest
Everything in this repository is free to use however you might see fit. If you want to support me and my projects, please consider linking back to this repository if you build/change/use anything.
If you would like to send me a tip, you could do it here (Please don't feel like you have to).
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | D | weteor:D_SOD-123_gold | D1, D2, D3, D4, D5, D6, D7, D8, D10, D11, D12, D13, D14, D15, D16, D17 +1 |
| 16 | SW_Push | weteor:ChocV1_V2_Hotswap | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17 |
| 3 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C5 |
| 2 | 100R | Resistor_SMD:R_0603_1608Metric | R1, R3 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1, C4 |
| 2 | SW_DPDT_x2 | weteor:DPDT - C2837066 | SW18, SW20 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | Battery_Cell | weteor:Coin Cell 2032 | BT1 |
| 1 | Conn_02x04_Odd_Even | Connector_PinSocket_1.27mm:PinSocket_2x04_P1.27mm_Vertical | J2 |
| 1 | Crystal_Small | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | E73-2G4M08S1C | weteor:E73-2G4M08S1C_bottom | U1 |
| 1 | Encoder | weteor:Mitsumi_SIQ-02FVS3 | ENC1 |
| 1 | FS8205 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | SWD_Ext | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | SW_Push | weteor:ChocV1_V2_Hotswap_1.5u | SW8 |
| 1 | SW_RESET | weteor:Micro_Push_Button_3x6x2.5mm | SW19 |
| 1 | XC6206PxxxMR | Package_TO_SOT_SMD:SOT-23 | U2 |
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weteor/LuttUnLutt
Lütt Un Lütt is a small 3x5+2 split ortho keyboard with encoder
10 parts70CERN-OHL-P-2.0
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Questions
How big is the Lul left PCB?
It measures 111.5 × 76.8 mm and has 2 copper layers, 1 mm thick.
What parts does the Lul left use?
54 parts, built around the E73-2G4M08S1C, DW01A and FS8205. 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 Lul left KiCad files?
From the weteor/LuttUnLutt repository on GitHub, at the commit this page was made from: the board is pcb/lul_left/lul_left.kicad_pcb and its schematic pcb/lul_left/lul_left.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lul left design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).