2 layers230.5 × 82 mm
Vitamins included
Duckle29/Vitamins-included
This repo holds a variation of the lets split. This board requires no soldering
214 parts49BSD-3-Clause
2 layers232.2 × 76.7 mm
Cpm43
Gtrx0/cpm435940% mechanical keyboard with rgb underglow and single color backlight
- Size
- 232.2 × 76.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 188
- Nets
- 138
- Pads
- 1,134
- Tracks, vias
- 2,186, 286
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 20 Jul 2018
- Updated
- 24 Apr 2019
Overview
Cpm43 is an open-source printed circuit board by Gtrx0, from the Gtrx0/cpm43 repository on GitHub. It is a 2-layer board of 232.2 × 76.7 mm with 188 parts on 138 nets, routed with 2,186 tracks and 286 vias.
It is built around the ATMEGA32U4, PRTR5V0U2X and WS2812B. Its parts include 57 diodes, 46 resistors, 21 capacitors, 2 ICs and 1 transistor. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA32U4
UncategorisedUnknown maker
PRTR5V0U2X
SOT-143-55℃~+125℃ 0.3pF、0.8pF 100W 10V、15V 5V 6.5V 6A 80nA ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 Three channels Unidirectional SOT-143 ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.mdCPM43
40% Mechanical keyboard PCB
Layout
Features
- In-switch LED support.
- Individually addressible RGB underglow provided by 14 separate WS2812B LEDs.
- USB Type-C connector on the left side.
- Compatible with Cherry MX and ALPS switches.
- Integrated 16MHz Atmega32u4 microcontroller for better QMK compatibility.
- USB ESD protection circuit.
- ICSP programming header just in case you try something a bit too extreme and need to unbrick it.
- 0805 SMD and through hole Diode/resistor compatibility for ease of assembly.
- USB breakout for extra redundency.
Warning
KiCad 5 or above is needed to open this project. KiCad 4 or below won't work.
Parts
188| Qty | Value | Footprint | References |
|---|---|---|---|
| 44 | 470 | Keebio-Parts:Resistor-Hybrid-Back | R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23, R24, R25 +28 |
| 43 | D | Keebio-Parts:Diode-Hybrid-Back | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +27 |
| 33 | MX-1U | MX_Alps_Hybrid:MX-1U | MX1, MX2, MX10, MX11, MX12, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX25, MX26 +17 |
| 17 | 0.1uF | Capacitors_SMD:C_0805_HandSoldering | C2, C3, C5, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22 +1 |
| 14 | WS2812B | WS2812B:WS2812B | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9, LED10, LED11, LED12, LED13, LED14 |
| 5 | MX-1.25U | MX_Alps_Hybrid:MX-1.25U | MX35, MX36, MX37, MX39, MX40 |
| 2 | 10k | Keebio-Parts:Resistor-Hybrid-Back | R1, R2 |
| 2 | 22 | Resistors_SMD:R_0805_HandSoldering | UR1, UR2 |
| 2 | 22pF | Capacitors_SMD:C_0805_HandSoldering | XC1, XC2 |
| 2 | 4.7uF | Capacitors_SMD:C_0805_HandSoldering | C4, C7 |
| 2 | 5.1k | Resistors_SMD:R_0805_HandSoldering | UR3, UR4 |
| 2 | CONN_1 | keyboard_parts:PIN_1 | P?, P? |
| 1 | 0.1uf | Capacitors_SMD:C_0805_HandSoldering | C1 |
| 1 | 1.5k | Keebio-Parts:Resistor-Hybrid-Back | NPNR1 |
| 1 | 1M | Resistors_SMD:R_0805_HandSoldering | UR5 |
| 1 | 1uF | Capacitors_SMD:C_0805_HandSoldering | C6 |
| 1 | 2x3 SPI | keyboard_parts:Pin_Header_Straight_2x03_Pitch2.54mm | SPI1 |
| 1 | 500mA Hold | Fuse_Holders_and_Fuses:Fuse_SMD1206_HandSoldering | F1 |
| 1 | ATmega32U4 | keyboard_parts:QFP44 | U1 |
| 1 | Conn_01x04 | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | J1 |
| 1 | Crystal_GND24 | keyboard_parts:Crystal_SMD_3225-4pin_3.2x2.5mm | X1 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C:HRO-TYPE-C-31-M-12-HandSoldering | USB1 |
| 1 | LOGO | Mixed Lib:CPMtitle4 | G*** |
| 1 | LOGO | Mixed Lib:CPM12deg | G*** |
| 1 | MX-1.25U | MX_Alps_Hybrid:MX-1.5U | MX34 |
| 1 | MX-1.25U | MX_Alps_Hybrid:MX-1.25U-FLIPPED | MX13 |
| 1 | MX-1.5U | MX_Alps_Hybrid:MX-1.5U | MX24 |
| 1 | MX-1.75U | MX_Alps_Hybrid:MX-1.75U | MX23 |
| 1 | MX-2.75U | MX_Alps_Hybrid:MX-2.75U | MX38 |
| 1 | PRTR5V0U2X | Nexperia:SOT143B | U2 |
| 1 | Q_NPN_BCE | TO_SOT_Packages_SMD:SOT-223-3_TabPin2 | Q1 |
| 1 | SW_PUSH | Buttons_Switches_SMD:SW_SPST_TL3342 | SW1 |
Questions
How big is the Cpm43 PCB?
It measures 232.2 × 76.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Cpm43 use?
188 parts, built around the ATMEGA32U4, PRTR5V0U2X 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 Cpm43 KiCad files?
From the Gtrx0/cpm43 repository on GitHub, at the commit this page was made from: the board is cpm43.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Cpm43 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Gtrx0 before reusing the design.
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