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 layers289.5 × 98 mm
My keyboard
howardbot/Keyboard_building- Size
- 289.5 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 153
- Nets
- 103
- Pads
- 806
- Tracks, vias
- 644, 66
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Aug 2025
- Updated
- 6 Aug 2025
Overview
My keyboard is an open-source printed circuit board by howardbot, from the howardbot/Keyboard_building repository on GitHub, published under the MIT licence. It is a 2-layer board of 289.5 × 98 mm with 153 parts on 103 nets, routed with 644 tracks and 66 vias.
It is built around the ATMEGA32U4-AU, AMS1117-3.3 and 1N4148W. Its parts include 61 diodes, 9 capacitors, 6 switches, 5 resistors and 2 ICs. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
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)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
README
README.mdParts
153| Qty | Value | Footprint | References |
|---|---|---|---|
| 61 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +45 |
| 61 | SW_Push | key-switches:SW_MX_HotSwap_PTH | KEY1, KEY2, KEY10, KEY11, KEY12, KEY13, KEY14, KEY15, KEY16, KEY17, KEY18, KEY19, KEY20, KEY21, KEY22, KEY23 +45 |
| 5 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C6 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C8, C9 |
| 2 | 1uF | Capacitor_SMD:C_0603_1608Metric | C1, C7 |
| 2 | 20pF | Capacitor_SMD:C_0603_1608Metric | C4, C5 |
| 2 | 22R | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_2.25u | S41, S42 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 500mA, 6V | Fuse:Fuse_0805_2012Metric | F1 |
| 1 | 8MHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | ISP | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_2.75u | S53 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_2u | S14 |
| 1 | MX_stab | PCM_marbastlib-mx:STAB_MX_P_6.25u | S57 |
| 1 | RESET | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
Questions
How big is the My keyboard PCB?
It measures 289.5 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the My keyboard use?
153 parts, built around the ATMEGA32U4-AU, AMS1117-3.3 and 1N4148W. 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 My keyboard KiCad files?
From the howardbot/Keyboard_building repository on GitHub, at the commit this page was made from: the board is 61_keys/my-keyboard.kicad_pcb and its schematic 61_keys/key_matrix.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the My keyboard design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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