2 layers27.5 × 40.3 mm
2 layers75.2 × 62.6 mm
Twelvekey
str-dst/twelvekey49simple mechanical macropad case
- Size
- 75.2 × 62.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 57
- Pads
- 239
- Tracks, vias
- 438, 29
- Pours
- 240
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 Jan 2021
- Updated
- 25 Feb 2024
Overview
Twelvekey is an open-source printed circuit board by str-dst, from the str-dst/twelvekey repository on GitHub. It is a 2-layer board of 75.2 × 62.6 mm with 54 parts on 57 nets, routed with 438 tracks and 29 vias.
It is built around the ATMEGA328P-AU, SRV05-4 and AO3401A. Its parts include 20 resistors, 8 diodes, 5 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
ATMEGA328P-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
SRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
README
pcb/README.mdParts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 1k | Resistor_SMD:R_0805_2012Metric | R1, R3, R4, R10, R11, R12, R13, R14, R15, R16, R17, R18 |
| 12 | MX-LED | MX_Only:MXOnly-1U | MX1, MX2, MX3, MX4, MX5, MX6, MX7, MX8, MX9, MX10, MX11, MX12 |
| 6 | D_Small | custom_parts:D_SOT-23_ANK | D1, D2, D3, D4, D5, D6 |
| 2 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C2, C3 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R2, R20 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric | C7, C8 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R5, R6 |
| 2 | 68R | Resistor_SMD:R_0805_2012Metric | R7, R8 |
| 2 | D_Zener_Small | Diode_SMD:D_SOD-123 | D7, D8 |
| 2 | SW_Push | random-keyboard-parts:SKQG-1155865 | BOOT, RESET |
| 1 | 1.5K | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | 100R | Resistor_SMD:R_0805_2012Metric | R19 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | ATmega328P-A | Package_QFP:TQFP-32_7x7mm_P0.8mm | U1 |
| 1 | Conn_01x06 | Connector_PinHeader_1.27mm:PinHeader_1x06_P1.27mm_Vertical | J1 |
| 1 | Crystal_GND24_Small | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | X1 |
| 1 | Polyfuse_Small | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | USB1 |
Questions
How big is the Twelvekey PCB?
It measures 75.2 × 62.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Twelvekey use?
54 parts, built around the ATMEGA328P-AU, SRV05-4 and AO3401A. 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 Twelvekey KiCad files?
From the str-dst/twelvekey repository on GitHub, at the commit this page was made from: the board is pcb/twelvekey.kicad_pcb and its schematic pcb/twelvekey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Twelvekey design in my own project?
Its repository states no licence, so its author keeps all rights: ask str-dst before reusing the design.
Similar boards
- 2 layers65 × 35 mm
- 4 layers102 × 49 mm
CURSO PCB DRONE
ArduProject/PCB_DRONE_C8
En este repositorio encontrareis los archivos de fabricación y las listas de montaje del PCB con STM32F103C8 que hemos visto en el curso.
153 parts1MIT - 2 layers169.4 × 71 mm
Transmitter PCB
PrashantHalai-212/Transmitter_PCB
A Batman inspired Batarang shaped wireless transmitter board featuring an ATmega328P microcontroller, NRF24L01 module, and onboard CH340G USB programmer.
55 parts1MIT - 4 layers102 × 49 mm
CURSO PCB DRONE
ArduProject/PCB_DRONE_R8
En este repositorio encontrareis los archivos de fabricación y las listas de montaje del PCB con STM32F103R8 que hemos visto en el curso.
163 partsMIT - 4 layers70 × 70 mm
Ai camera
maxlab-io/tokay-lite-pcb
Tokay AI Camera - ESP32 camera development board
161 parts130CERN-OHL-P-2.0 - 2 layers85 × 56 mm
- 2 layers271.5 × 91.8 mm
