2 layers275.1 × 113 mm
2 layers133.4 × 110.2 mm
Rev2-left
celcius-plus-273/split-keyboard- Size
- 133.4 × 110.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 71
- Pads
- 336
- Tracks, vias
- 517, 62
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 30 Mar 2024
- Updated
- 17 Oct 2026
Overview
Rev2-left is an open-source printed circuit board by celcius-plus-273, from the celcius-plus-273/split-keyboard repository on GitHub. It is a 2-layer board of 133.4 × 110.2 mm with 89 parts on 71 nets, routed with 517 tracks and 62 vias.
It is built around the ATMEGA32U4. Its parts include 34 diodes, 33 switches, 8 capacitors, 6 resistors and 2 connectors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdsplit-keyboard
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | D | Diode_SMD:D_SOD-123 | D101, D102, D103, D104, D105, D106, D107, D108, D109, D110, D111, D112, D113, D114, D115, D116 +16 |
| 4 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C101, C102, C103, C104 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_Pad_TopBottom | H101, H102, H103, H104 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R101, R102 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R105, R106 |
| 2 | 22 | Resistor_SMD:R_0603_1608Metric | R103, R104 |
| 2 | 22pF | Capacitor_SMD:C_0603_1608Metric | C106, C107 |
| 2 | GREEN | LED_SMD:LED_0603_1608Metric | D133, D134 |
| 1 | 1 | CherryMX_PCB:CherryMX_1.00u_PCB | SW102 |
| 1 | 16 MHz | Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm | Y101 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C108 |
| 1 | 2 | CherryMX_PCB:CherryMX_1.00u_PCB | SW103 |
| 1 | 3 | CherryMX_PCB:CherryMX_1.00u_PCB | SW104 |
| 1 | 4 | CherryMX_PCB:CherryMX_1.00u_PCB | SW105 |
| 1 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C105 |
| 1 | 5 | CherryMX_PCB:CherryMX_1.00u_PCB | SW106 |
| 1 | A | CherryMX_PCB:CherryMX_1.00u_PCB | SW116 |
| 1 | ATmega32U4 | Package_QFP:TQFP-44_10x10mm_P0.8mm | U101 |
| 1 | B | CherryMX_PCB:CherryMX_1.00u_PCB | SW127 |
| 1 | Bluefruit LE | Connector_JST:JST_SH_SM08B-SRSS-TB_1x08-1MP_P1.00mm_Horizontal | J101 |
| 1 | C | CherryMX_PCB:CherryMX_1.00u_PCB | SW125 |
| 1 | C1 | CherryMX_PCB:CherryMX_1.00u_PCB | SW107 |
| 1 | C2 | CherryMX_PCB:CherryMX_1.00u_PCB | SW114 |
| 1 | C3 | CherryMX_PCB:CherryMX_1.00u_PCB | SW121 |
| 1 | C4 | CherryMX_PCB:CherryMX_1.00u_PCB | SW128 |
| 1 | D | CherryMX_PCB:CherryMX_1.00u_PCB | SW118 |
| 1 | E | CherryMX_PCB:CherryMX_1.00u_PCB | SW111 |
| 1 | ESC | CherryMX_PCB:CherryMX_1.00u_PCB | SW101 |
| 1 | F | CherryMX_PCB:CherryMX_1.00u_PCB | SW119 |
| 1 | G | CherryMX_PCB:CherryMX_1.00u_PCB | SW120 |
| 1 | JST-PH | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J102 |
| 1 | LCTRL | CherryMX_PCB:CherryMX_1.00u_PCB | SW122 |
| 1 | LSHIFT | CherryMX_PCB:CherryMX_1.00u_PCB | SW115 |
| 1 | M1 | CherryMX_PCB:CherryMX_1.00u_PCB | SW130 |
| 1 | M2 | CherryMX_PCB:CherryMX_1.00u_PCB | SW131 |
| 1 | Q | CherryMX_PCB:CherryMX_1.00u_PCB | SW109 |
| 1 | R | CherryMX_PCB:CherryMX_1.00u_PCB | SW112 |
| 1 | S | CherryMX_PCB:CherryMX_1.00u_PCB | SW117 |
| 1 | SPACE | CherryMX_PCB:CherryMX_1.00u_PCB | SW132 |
| 1 | SUPER | CherryMX_PCB:CherryMX_1.00u_PCB | SW129 |
| 1 | T | CherryMX_PCB:CherryMX_1.00u_PCB | SW113 |
| 1 | TAB | CherryMX_PCB:CherryMX_1.00u_PCB | SW108 |
| 1 | V | CherryMX_PCB:CherryMX_1.00u_PCB | SW126 |
| 1 | W | CherryMX_PCB:CherryMX_1.00u_PCB | SW110 |
| 1 | X | CherryMX_PCB:CherryMX_1.00u_PCB | SW124 |
| 1 | Z | CherryMX_PCB:CherryMX_1.00u_PCB | SW123 |
| 1 | reset_sw | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | S101 |
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Questions
How big is the Rev2-left PCB?
It measures 133.4 × 110.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Rev2-left use?
89 parts, built around the ATMEGA32U4. 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 Rev2-left KiCad files?
From the celcius-plus-273/split-keyboard repository on GitHub, at the commit this page was made from: the board is rev2-left/rev2-left.kicad_pcb and its schematic keeb-rev1-mirror/keeb-rev1-mirror.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rev2-left design in my own project?
Its repository states no licence, so its author keeps all rights: ask celcius-plus-273 before reusing the design.