2 layers201 × 105.6 mm
2 layers423.9 × 223.8 mm
EtcEosKey
DenkyTuna/etcEosKeyCustom hardware keyboard for ETC EOS Series. Abandoned due to too big dimension of PCB. Will need to remake using a split design.
- Size
- 423.9 × 223.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 448
- Nets
- 326
- Pads
- 3,487
- Tracks, vias
- 1,430, 138
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 9 Aug 2026
- Updated
- 9 Aug 2026
Overview
EtcEosKey is an open-source printed circuit board by DenkyTuna, from the DenkyTuna/etcEosKey repository on GitHub, published under the MIT licence. It is a 2-layer board of 423.9 × 223.8 mm with 448 parts on 326 nets, routed with 1,430 tracks and 138 vias.
It is built around the ATMEGA32U4-MU, RT9013-33GB and SP3485EN-Y, with the TLP2361(E and SK6812MINI-E among its other parts. Its parts include 220 diodes, 118 switches, 31 capacitors, 16 resistors and 9 connectors. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
5
ATMEGA32U4-MU
VQFN-44-EP(7x7)-40℃~+85℃ 10bit 16MHz 1KB 2.5KB 2.7V~5.5V 26 32KB 8 Bit AVR Built-in FLASH VQFN-44-EP(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
RT9013-33GB
SOT-23-5-40℃~+125℃@(Tj) 1 25uA 3.3V 30uVrms 400mV@(500mA) 5.5V 500mA 50dB@(10kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSRICHTEKVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SP3485EN-Y
SOP-8SOP-8 RS-485 / RS-422 ICs ROHSYLPTECRS-485 / RS-422 ICs
TLP2361(E
SO-6,5LEAD-40℃~+125℃ 1.5V 1.6mA 10mA 15Mbps 2.7V~5.5V 20kV/us 3.75kV 5V 6V 6mA 80ns 80ns DC SO-6,5LEAD Logic Output Optoisolators ROHSToshibaLogic Output Optoisolators
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
README
README.mdCustom hardware keyboard for ETC EOS Series. Abandoned due to too big dimension of PCB. Will need to remake using a split design. It contains the design of https://github.com/siderakb/next-micro (MIT License).
Parts
448| Qty | Value | Footprint | References |
|---|---|---|---|
| 109 | DIODE | kbd_Parts:Diode_TH_SMD_90deg_rev | D10, D11, D12, D13, D14, D100, D101, D102, D108, D109, D110, D111, D112, D113, D114, D117 +93 |
| 109 | SK6812MINI | BrownSugar_KBD:RGBLED_SK6812MINI-E_180deg | LED10, LED11, LED12, LED13, LED14, LED100, LED101, LED102, LED108, LED109, LED110, LED111, LED112, LED113, LED114, LED117 +93 |
| 105 | SW_Push | BrownSugar_KBD:CherryMX_Kailh_Choc_V1_1U_north_noLED | SW10, SW11, SW12, SW13, SW14, SW100, SW101, SW102, SW108, SW109, SW110, SW111, SW112, SW113, SW114, SW117 +89 |
| 12 | 10nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12 |
| 12 | Hole_Screw_M2 | kbd_Hole:m2_Screw_Hole | H701, H704, H707, H710, H713, H716, H719, H722, H725, H728, H731, H734 |
| 12 | Hole_Screw_M3 | kbd_Hole:m3_Screw_Hole_EdgeCuts | H703, H706, H709, H712, H715, H718, H721, H724, H727, H730, H733, H736 |
| 12 | Hole_Spacer_M2 | kbd_Hole:m2_Spacer_Hole_hex | H702, H705, H708, H711, H714, H717, H720, H723, H726, H729, H732, H735 |
| 8 | 1uF | Capacitor_SMD:C_0402_1005Metric | C504, C505, C508, C509, C604, C605, C608, C609 |
| 7 | 100nF | Capacitor_SMD:C_0402_1005Metric | C503, C506, C507, C603, C606, C607, C701 |
| 4 | 20pF | Capacitor_SMD:C_0402_1005Metric | C501, C502, C601, C602 |
| 4 | 22 | Resistor_SMD:R_0402_1005Metric | R503, R504, R603, R604 |
| 4 | 5.1k | Resistor_SMD:R_0402_1005Metric | R501, R502, R601, R602 |
| 4 | Conn_01x13 | Connector_PinHeader_2.54mm:PinHeader_1x13_P2.54mm_Vertical | J502, J504, J602, J604 |
| 4 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW121, SW122, SW123, SW124 |
| 4 | SW_Push | BrownSugar_KBD:CherryMX_Kailh_Choc_V1_2U_north_noLED | SW401, SW402, SW403, SW404 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R505, R605, R702 |
| 2 | 500mA, 6V | Fuse:Fuse_0805_2012Metric | F501, F601 |
| 2 | 8MHz | Crystal:Crystal_SMD_Qantek_QC5CB-2Pin_5x3.2mm | Y501, Y601 |
| 2 | ATmega32U4-M | Package_DFN_QFN:QFN-44-1EP_7x7mm_P0.5mm_EP5.2x5.2mm | U501, U601 |
| 2 | B5817 | Diode_SMD:D_SOD-323_HandSoldering | D501, D601 |
| 2 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J503, J603 |
| 2 | G*** | kibuzzard-637F2329 | nextu_1, nextu_2 |
| 2 | RESET | Button_Switch_SMD:SW_SPST_B3U-1000P | SW501, SW601 |
| 2 | RT9013-33GB | Package_TO_SOT_SMD:SOT-23-5 | U502, U602 |
| 2 | R_Potentiometer | ALPS_Slide_potentiometer:Potentiometer_Boruns_PTS6043_PTS4543_ALPS_RS6011Y_Hybrid | RV1, RV2 |
| 2 | RotaryEncoder | BrownSugar_KBD:RotaryEncoder_EC12E_-HorizontalMount | SW125, SW126 |
| 2 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP501, JP601 |
| 2 | USB_C_Receptacle_USB2.0 | next_micro:USB Type-C Mid-Mount Receptacle 16P | J501, J601 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R703 |
| 1 | 200k | Resistor_SMD:R_0402_1005Metric | R706 |
| 1 | 20k | Resistor_SMD:R_0402_1005Metric | R705 |
| 1 | 4.7k | Resistor_SMD:R_0402_1005Metric | R704 |
| 1 | 470 | Resistor_SMD:R_0402_1005Metric | R701 |
| 1 | Opto_bypass | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP701 |
| 1 | Opto_enable | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP702 |
| 1 | SP3485EN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U702 |
| 1 | SW_Rotary2x4 | kbd_Parts:RotarySwitch_SR1712F-0204-15K0A-B9-N-027 | SW701 |
| 1 | TLP2361 | Package_SO:SO-6_4.4x3.6mm_P1.27mm | U701 |
| 1 | XLR3 | Connector_JST:JST_XH_S3B-XH-A_1x03_P2.50mm_Horizontal | J701 |
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Questions
How big is the EtcEosKey PCB?
It measures 423.9 × 223.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the EtcEosKey use?
448 parts, built around the ATMEGA32U4-MU, RT9013-33GB, SP3485EN-Y and TLP2361(E. 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 EtcEosKey KiCad files?
From the DenkyTuna/etcEosKey repository on GitHub, at the commit this page was made from: the board is etcEosKey.kicad_pcb and its schematic etcEosKey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the EtcEosKey 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).