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 layers176.2 × 83.4 mm
SdraKb00
drabaioli/SdraKb001Hot-swap macropad with rotary encoder
- Size
- 176.2 × 83.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 97
- Nets
- 69
- Pads
- 346
- Tracks, vias
- 588, 98
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 4 May 2024
- Updated
- 21 Jul 2025
Overview
SdraKb00 is an open-source printed circuit board by drabaioli, from the drabaioli/SdraKb00 repository on GitHub, published under the MIT licence. It is a 2-layer board of 176.2 × 83.4 mm with 97 parts on 69 nets, routed with 588 tracks and 98 vias.
It is built around the ATMEGA32U4-AU and PRTR5V0U2X. Its parts include 24 switches, 20 capacitors, 13 diodes, 10 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)
README
README.mdSdraKb00
12 keys hot-swap macropad with rotary encoder.
Assembled images
Features
- 11 hot-swap keys
- Rotary encoder with push button
- AtMega32U4 MCU
- Per-key RGB led for backlighting
- USB-C connector
- On PCB SPI header
- MCU reset button
- Switch mounting plate
- Power LED indicator
Keyboard Layout Editor link
Schematic
PCB
Switch plate
Production files
The production/ folder contains files required for manufacturing the board, namely the SdraKb00.zip is an export (JLCPCB accepted format) of the gerber files and the BOM. The BOM was edited to add links to JLCPCB parts. Both files can be used to get the PCB manufactured by JLCPCB with relative components.
Parts
97| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | SW_Push_45deg | marbastlib-mx:SW_MX_HS_CPG151101S11_1u | SW00, SW00_cutout, SW01, SW01_cutout, SW02, SW02_cutout, SW10, SW10_cutout, SW11, SW11_cutout, SW12, SW12_cutout, SW13, SW13_cutout, SW20, SW20_cutout +6 |
| 16 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C5, C15, C16, C17, Crgb00, Crgb01, Crgb02, Crgb10, Crgb11, Crgb12, Crgb13, Crgb20, Crgb21, Crgb22, Crgb23 |
| 12 | D_Small | Diode_SMD:D_SOD-123 | D00, D01, D02, D03, D10, D11, D12, D13, D20, D21, D22, D23 |
| 11 | MX_SK6812MINI-E | marbastlib-mx:LED_MX_6028R-ROT | RGB00, RGB01, RGB02, RGB10, RGB11, RGB12, RGB13, RGB20, RGB21, RGB22, RGB23 |
| 8 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 4 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R4, R5 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R7 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C19, C20 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8, R9 |
| 2 | 5.5mm | marbastlib-various:mousebites_5p5mm_easysnap | MB5, MB5 |
| 2 | RotaryEncoder_Switch | marbastlib-various:ROT_Alps_EC11E-Switch | SW03, SW03_cutout |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C18 |
| 1 | 150 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 300 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F1 |
| 1 | ATmega32U4-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | AVR-ISP-6 | Connector_PinHeader_2.00mm:PinHeader_1x06_P2.00mm_Horizontal | J1 |
| 1 | HRO-TYPE-C-31-M-12 | Type-C:HRO-TYPE-C-31-M-12-HandSoldering | USB1 |
| 1 | PRTR5V0U2X | Package_TO_SOT_SMD:SOT-143_Handsoldering | U2 |
| 1 | RED 1.8V | LED_SMD:LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder | D4 |
| 1 | Reset_SW | Button_Switch_SMD:SW_SPST_SKQG_WithStem | SW_rst1 |
The 95 most common of 97 parts.
Questions
How big is the SdraKb00 PCB?
It measures 176.2 × 83.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SdraKb00 use?
97 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 SdraKb00 KiCad files?
From the drabaioli/SdraKb00 repository on GitHub, at the commit this page was made from: the board is KiCad_PCB/SdraKb00.kicad_pcb and its schematic KiCad_PCB/SdraKb00.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SdraKb00 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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