Chiral
About the Chiral PCB
Chiral is an open source PCB design by bakageta, published on GitHub under the MIT license. It is a 2-layer board measuring 94.2 × 141.8 mm, with 130 components from 21 distinct parts.
Other key parts include the ProMicro and SK6812mini. By type, the board carries 30 ICs, 30 switches, 29 diodes, 11 jumpers, 3 connectors and 2 resistors.
It belongs with the keyboards designs in this gallery.
From the project
An ambidextrous numpad that supports MX, Alps, and Kailh Choc switches.
An ambidextrous numpad based on pluis9's Helix.
v0.2 - Organized footprints used, initial silkscreen work
Main components on the Chiral
Chiral bill of materials (BOM)
130 components, 21 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ProMicro | ProMicro_Double | MCU1 |
| 14 | SK6812mini | SK6812MINI_MX_Offset_180 | U1, U2, U8, U9, U10, U11, U12, U18 +6 |
| 15 | SK6812mini | SK6812MINI_MX_Offset | U3, U4, U5, U6, U7, U13, U14, U15 +7 |
| 1 | OLED | MY_SIL-4 | P1 |
| 1 | LED | StripLED_rev | P2 |
| 1 | ICSP | MY_SIL-2x3 | P3 |
| 2 | EdgeCut | Break_Cut_Edge | B1, B8 |
| 5 | EdgeCut | Break_Cut_MX100 | B2, B4, B5, B6, B7 |
| 1 | EdgeCut | Break_Cut_MX150 | B3 |
| 1 | Cooling Holes | PinHeader_4x10_P2.54mm | H1 |
| 4 | M2 | HOLE_M2 | H2, H3, H4, H5 |
| 12 | 4.7mm | HOLE_4.7mm | H6, H7, H8, H9, H10, H11, H12, H13 +4 |
| 3 | JP2 | Jumper | JP1, JP2, JP3 |
| 2 | GND | Jumper | JP4, JP11 |
| 2 | VCC | Jumper | JP5, JP10 |
| 2 | SCL | Jumper | JP6, JP9 |
| 2 | SDA | Jumper | JP7, JP8 |
| 29 | SW_PUSH | MX_ALPS_PG1350_noLed | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +21 |
| 1 | Reset | SW_3.5x6.0_TH | SW30 |
| 29 | D | D3_TH_SMD | D1, D2, D3, D4, D5, D6, D7, D8 +21 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | R | R2 | R1, R2 |
Chiral design files
The KiCad project lives in the bakageta/Chiral repository on GitHub; these links point at the commit this page was built from.
- Layoutchiral.kicad_pcb
Chiral: common questions
How big is the Chiral PCB?
The Chiral measures 94.2 × 141.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Chiral?
130 components, from 21 distinct parts. The full bill of materials is listed on this page.
Where can I download the Chiral design files?
From the bakageta/Chiral repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Chiral design in my own project?
Yes, under the terms of its MIT license, which bakageta chose for the repository.
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