2 layers243.9 × 136.5 mm
Barobord
sadekbaroudi/barobord
I have spent a lot of time and money designing prototypes, testing, developing, etc. Any contributions would be greatly appreciated!
157 parts57
2 layers304.8 × 99.7 mm
Keyboard
seantchen/keyboard-projectCustom 65% keyboard.
- Size
- 304.8 × 99.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 157
- Nets
- 110
- Pads
- 597
- Tracks, vias
- 934, 118
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 31 Dec 2025
- Updated
- 21 Apr 2026
Overview
Keyboard is an open-source printed circuit board by seantchen, from the seantchen/keyboard-project repository on GitHub. It is a 2-layer board of 304.8 × 99.7 mm with 157 parts on 110 nets, routed with 934 tracks and 118 vias.
It is built around the ATMEGA32U4-AU and PRTR5V0U2X. Its parts include 67 diodes, 64 switches, 8 capacitors, 6 resistors and 2 ICs. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATMEGA32U4-AU
QFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH QFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
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)
Parts
157| Qty | Value | Footprint | References |
|---|---|---|---|
| 67 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +51 |
| 4 | 0.1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C5, C6, C7 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R4 |
| 2 | 22p | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5, R6 |
| 1 | "' | MX:MXOnly-1U-NoLED | SW43 |
| 1 | += | MX:MXOnly-1U-NoLED | SW14 |
| 1 | -_ | MX:MXOnly-1U-NoLED | SW13 |
| 1 | 0 | MX:MXOnly-1U-NoLED | SW12 |
| 1 | 1 | MX:MXOnly-1U-NoLED | SW3 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | 2 | MX:MXOnly-1U-NoLED | SW4 |
| 1 | 200m | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | 3 | MX:MXOnly-1U-NoLED | SW5 |
| 1 | 4 | MX:MXOnly-1U-NoLED | SW6 |
| 1 | 5 | MX:MXOnly-1U-NoLED | SW7 |
| 1 | 6 | MX:MXOnly-1U-NoLED | SW8 |
| 1 | 7 | MX:MXOnly-1U-NoLED | SW9 |
| 1 | 8 | MX:MXOnly-1U-NoLED | SW10 |
| 1 | 9 | MX:MXOnly-1U-NoLED | SW11 |
| 1 | :; | MX:MXOnly-1U-NoLED | SW42 |
| 1 | <, | MX:MXOnly-1U-NoLED | SW54 |
| 1 | >. | MX:MXOnly-1U-NoLED | SW55 |
| 1 | ?/ | MX:MXOnly-1U-NoLED | SW56 |
| 1 | A | MX:MXOnly-1U-NoLED | SW33 |
| 1 | ALT | MX:MXOnly-1.5U-NoLED | SW62 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | AVR-ISP-6 | Random-Keyboard-Parts:Reset_Pretty-Mask | J1 |
| 1 | B | MX:MXOnly-1U-NoLED | SW51 |
| 1 | BSPC | MX:MXOnly-2U-NoLED | SW15 |
| 1 | C | MX:MXOnly-1U-NoLED | SW49 |
| 1 | CAPS | MX:MXOnly-1.75U-NoLED | SW32 |
| 1 | CTRL | MX:MXOnly-1.25U-NoLED | SW65 |
| 1 | CTRL | MX:MXOnly-1.5U-NoLED | SW60 |
| 1 | Crystal_GND24_Small | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | D | MX:MXOnly-1U-NoLED | SW35 |
| 1 | DEL | MX:MXOnly-1U-NoLED | SW16 |
| 1 | DOWN | MX:MXOnly-1U-NoLED | SW67 |
| 1 | E | MX:MXOnly-1U-NoLED | SW20 |
| 1 | END | MX:MXOnly-1U-NoLED | SW59 |
| 1 | ENTER | MX:MXOnly-2.25U-NoLED | SW44 |
| 1 | ESC | MX:MXOnly-1U-NoLED | SW2 |
| 1 | F | MX:MXOnly-1U-NoLED | SW36 |
| 1 | FN | MX:MXOnly-1.25U-NoLED | SW64 |
| 1 | FerriteBead_Small | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | FB1 |
| 1 | G | MX:MXOnly-1U-NoLED | SW37 |
| 1 | H | MX:MXOnly-1U-NoLED | SW38 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C:HRO-TYPE-C-31-M-12-HandSoldering | USB1 |
| 1 | I | MX:MXOnly-1U-NoLED | SW25 |
| 1 | J | MX:MXOnly-1U-NoLED | SW39 |
| 1 | K | MX:MXOnly-1U-NoLED | SW40 |
| 1 | L | MX:MXOnly-1U-NoLED | SW41 |
| 1 | LEFT | MX:MXOnly-1U-NoLED | SW66 |
| 1 | LOGO | logos:official | G*** |
| 1 | M | MX:MXOnly-1U-NoLED | SW53 |
| 1 | N | MX:MXOnly-1U-NoLED | SW52 |
| 1 | O | MX:MXOnly-1U-NoLED | SW26 |
| 1 | P | MX:MXOnly-1U-NoLED | SW27 |
| 1 | PGDN | MX:MXOnly-1U-NoLED | SW45 |
| 1 | PGUP | MX:MXOnly-1U-NoLED | SW31 |
| 1 | PRTR5V0U2X | Random-Keyboard-Parts:SOT143B | U2 |
| 1 | Q | MX:MXOnly-1U-NoLED | SW18 |
| 1 | R | MX:MXOnly-1U-NoLED | SW21 |
| 1 | RIGHT | MX:MXOnly-1U-NoLED | SW68 |
| 1 | S | MX:MXOnly-1U-NoLED | SW34 |
| 1 | SHIFT | MX:MXOnly-1.75U-NoLED | SW57 |
| 1 | SHIFT | MX:MXOnly-2.25U-NoLED | SW46 |
| 1 | SPACE | MX:MXOnly-6.25U-ReversedStabilizers-NoLED | SW63 |
| 1 | T | MX:MXOnly-1U-NoLED | SW22 |
| 1 | TAB | MX:MXOnly-1.5U-NoLED | SW17 |
| 1 | U | MX:MXOnly-1U-NoLED | SW24 |
| 1 | UP | MX:MXOnly-1U-NoLED | SW58 |
| 1 | V | MX:MXOnly-1U-NoLED | SW50 |
| 1 | W | MX:MXOnly-1U-NoLED | SW19 |
| 1 | WIN | MX:MXOnly-1.25U-NoLED | SW61 |
| 1 | X | MX:MXOnly-1U-NoLED | SW48 |
| 1 | Y | MX:MXOnly-1U-NoLED | SW23 |
| 1 | Z | MX:MXOnly-1U-NoLED | SW47 |
The 153 most common of 157 parts.
Questions
How big is the Keyboard PCB?
It measures 304.8 × 99.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Keyboard use?
157 parts, built around the ATMEGA32U4-AU and PRTR5V0U2X. 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 Keyboard KiCad files?
From the seantchen/keyboard-project repository on GitHub, at the commit this page was made from: the board is keyboard/keyboard.kicad_pcb and its schematic keyboard/keyboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Keyboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask seantchen before reusing the design.
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