2 layers277.2 × 107.5 mm
Corne V4 Pro Micro Edition
klouderone/CorneV4ProMicroEdition
The Corne V4 with Pro Micro Micocontrollers, made specifically for beginners and support for wireless microcontrollers
112 parts208CC-BY-4.0
2 layers276.1 × 97.5 mm
DuoMacro
RobotMasterC/DucoDuco is a low profile split keyboard that has extra keys for macros and uses ZMK firmware
- Size
- 276.1 × 97.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 137
- Nets
- 101
- Pads
- 706
- Tracks, vias
- 708, 17
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Oct 2025
- Updated
- 26 Mar 2026
Overview
DuoMacro is an open-source printed circuit board by RobotMasterC, from the RobotMasterC/Duco repository on GitHub. It is a 2-layer board of 276.1 × 97.5 mm with 137 parts on 101 nets, routed with 708 tracks and 17 vias.
It is built around the PCM12SMTR. Its parts include 58 switches, 56 diodes and 2 ICs. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
Main components
1README
README.mdDuco
Duco is a low profile split keyboard that has extra keys for macros and uses ZMK firmware
It was made for Hack Clubs Blueprint program!
Images
Schematic
PCB
Top Case
Bottom Case
Firmware
BOM
Overall cost: $116.82
| Item | Quantity | Unit Price | Total Price |
|---|---|---|---|
| XIAO NRF52840 | 2 | 10.4 | 20.8 |
| Hotswap Socket (10 Pack) | 60 | 2.5 | 15 |
| Red Choc Switches (10 Pack) | 60 | 4.5 | 27 |
| 1N4148 Diodes | 56 | 0.045 | 2.7 |
| PCM12SMTR Switch | 2 | 1.16 | 2.32 |
| PCB | 5 | 14.8 | |
| Case (3D Printed) | 4 | 0 | |
| Keycaps (3D Printed) | 56 | 0 | |
| Shipping (Mouser) | 8.49 | ||
| Shipping (JLCPCB) | 11.99 | ||
| Shipping (ChosFox) | 6.8 | ||
| Tarrif Estimate (Mouser) | 6.27 | ||
| Overall Cost | 116.17 | ||
| Grant Needed | 89.38 | ||
| (I will pay for the PCB to let this fit into tier 3) |
Cart Screenshots
| JLCPCB | ChosFox | Mouser |
|---|---|---|
 |  |  |
Parts
137| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | ~ | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +40 |
| 54 | SW_Push | PCM_marbastlib-choc:SW_choc_v1_HS_CPG135001S30_1u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +38 |
| 6 | MountingHole | MountingHole:MountingHole_2.2mm_M2_Better | H1, H2, H3, H4, H5, H6 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D2.5mm | TP1, TP2, TP3, TP4 |
| 3 | BreakOff | Panelization:MouseBite-Slot_2.0x2.0mm_outset_D0.5mm_P0.85mm_3h | B1, B2, B3 |
| 2 | G*** | kibuzzard-68F124C1 | kibuzzard-68F124C1, kibuzzard-68F124C1 |
| 2 | G*** | kibuzzard-68F12504 | kibuzzard-68F12504, kibuzzard-68F12504 |
| 2 | G*** | kibuzzard-68F1247E | kibuzzard-68F1247E, kibuzzard-68F1247E |
| 2 | LOGO | footprints:Hack-Club-Flag | G***, G*** |
| 2 | PCM12SMTR | footprints:SW_PCM12SMTR | SW29, SW58 |
| 2 | SW_Push | PCM_marbastlib-choc:SW_choc_v1_HS_CPG135001S30_1.5u | SW28, SW57 |
| 2 | XIAO-nRF52840-SMD | footprints:modified-XIAO-nRF52840-SMD | U1, U2 |
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Questions
How big is the DuoMacro PCB?
It measures 276.1 × 97.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the DuoMacro use?
137 parts, built around the PCM12SMTR. 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 DuoMacro KiCad files?
From the RobotMasterC/Duco repository on GitHub, at the commit this page was made from: the board is KiCad PCB/DuoMacro.kicad_pcb and its schematic KiCad PCB/DuoMacro.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DuoMacro design in my own project?
Its repository states no licence, so its author keeps all rights: ask RobotMasterC before reusing the design.