2 layers228.4 × 85 mm
LeChiffre
tominabox1/Le-Chiffre-Keyboard
Great thanks goes to Jake at P3D for really making the case amazing and open sourcing his work. Check him out at P3Dstore.com
105 parts183GPL-3.0
2 layers301.3 × 89.5 mm
Chocolate bar
misonoworks/chocolate-bar16A low-profile 50% keyboard, with less ergonomics than expected!
- Size
- 301.3 × 89.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 156
- Nets
- 109
- Pads
- 576
- Tracks, vias
- 1,147, 57
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 30 Nov 2020
- Updated
- 28 Sep 2021
Overview
Chocolate bar is an open-source printed circuit board by misonoworks, from the misonoworks/chocolate-bar repository on GitHub, published under the AGPL-3.0 licence. It is a 2-layer board of 301.3 × 89.5 mm with 156 parts on 109 nets, routed with 1,147 tracks and 57 vias.
It is built around the ATMEGA32U4-AU and WS2812B. Its parts include 67 diodes, 19 capacitors, 6 resistors, 2 connectors and 1 IC. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdChocolate Bar
A low-profile 50% keyboard, with less ergonomics than expected!
This keyboard uses choc switches. Choc switches are low-profile switches pioneered by Kailh that use a non-MX style stem. This keyboard uses only standard sizes for choc keycaps, being 1u, 1.5u, and 2u
Please note: V2 PCBs are still compatible with V1 cases and plates. The new feature on the V2 PCB, the OLED, cannot be used on V1 plates or cases. V2 cases do not exist yet, that is currently still being worked on. V2 firmware is similarly unavailable, though the current firmware should work provided you update the pins. This will be updated after the next proto run.
Layout
Parts
156| Qty | Value | Footprint | References |
|---|---|---|---|
| 55 | D_Small | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +39 |
| 54 | MX-NoLED | Keebio-Parts:Kailh-PG1350-1u-NoLED | MX1, MX2, MX10, MX11, MX12, MX13, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23 +38 |
| 12 | 104 | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C12, C13, C14, C15, C16, C17, C18, C19 |
| 12 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D56, D57, D58, D59, D60, D61, D62, D63, D64, D65, D66, D67 |
| 5 | 1uF | Capacitor_SMD:C_0805_2012Metric | C5, C6, C7, C8, C11 |
| 3 | MX-NoLED | Keebio-Parts:Kailh-PG1350-2u-NoLED | MX30, MX45, MX46 |
| 2 | 10K | Resistor_SMD:R_0805_2012Metric | R4, R5 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R2, R3 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C9, C10 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R6, R7 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | Conn_01x04 | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | Crystal_GND24_Small | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | LOGO | random-keyboard-parts:chocbar | G*** |
| 1 | Polyfuse_Small | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | SW_Push | random-keyboard-parts:SKQG-1155865 | SW1 |
| 1 | USB_C_Receptacle_USB2.0 | Modified Footprints:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
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Questions
How big is the Chocolate bar PCB?
It measures 301.3 × 89.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Chocolate bar use?
156 parts, built around the ATMEGA32U4-AU and WS2812B. 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 Chocolate bar KiCad files?
From the misonoworks/chocolate-bar repository on GitHub, at the commit this page was made from: the board is v2_kicad/chocolatebar.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Chocolate bar design in my own project?
Its repository publishes it under the AGPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).