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2 layers100 × 100 mmArc-16, the printed circuit board in 3D

This is a macro pad with 16 keys , 0.91 inch oled and rgb

Size
100 × 100 mm
Copper layers
2
Thickness
1.6 mm
Parts
43
Nets
39
Pads
180
Tracks, vias
395, 60
Pours
1
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
28 Jun 2025
Updated
30 Jun 2025

Overview

Arc-16 is an open-source printed circuit board by Sameer-Kulhari, from the Sameer-Kulhari/Arc-16 repository on GitHub. It is a 2-layer board of 100 × 100 mm with 43 parts on 39 nets, routed with 395 tracks and 60 vias.

It is built around the SK6812MINI-E. Its parts include 25 diodes, 16 switches, 1 IC and 1 connector. It belongs with the lEDs and displays and keyboards and input boards and the RP2040 boards of this library.

Main components

1

README

README.md

Arc-16

Arc-16 is a macro-pad with 16 keys,oled and rgb for aesthetics and look ,with a custom cool looking 3d case and working on kmk firmware .

Features :

  • 16 keys
  • Oled (128*32)
  • Rgb under keys
  • kmk firmware
  • 3 layers for rgb and functions control keys

CAD :

Here are some looks of Arc-16 .

It has two parts top and bottom which can be assembled using M3 screws and heatsets.The design is made in Onshape.

Full Case

<img src=CAD/Images/Full.png alt="Schematic" width="500"/>

Bottom

<img src=CAD/Images/Bottom.png alt="Schematic" width="500"/>

PCB :

Here are some looks of PCB

This pcb is made in kicad.

3d view

<img src=PCB/images/3d_front.png alt="Schematic" width="500"/>

Schematics

<img src=PCB/images/Schematic.png alt="Schematic" width="500"/>

Firmware

Arc -16 uses kmk Firmware with Circuit-python

  • 3 layers for more keys
  • Oled displays current layer
  • Rgb with different modes

BOM

Here is a list of materials required to make the Arc-16

  • 1x Seeed XIAO RP2040
  • 16x Cherry MX 1.0u Switches
  • 1x 0.91 inch OLED display
  • 9x SK6812 mini-e LEDs
  • 16x 1N14148 diodes
  • Pcb of Arc-16
  • Case of Arc-16
  • 4x M3 screws
  • 4x M3 heatsets
  • 16x Blank DSA keycaps

Extra

All images are attached in each section along with dependancies.Have a look at it.

Thank You!___

Parts

43
QtyValueFootprintReferences
161N4148Diode_THT:D_DO-35_SOD27_P7.62mm_HorizontalD1, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17
16SW_PushLibrary:SW_Cherry_MX_1.00u_PCB_With_3dSW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13, SW14, SW15, SW16
9SK6812MINISK6812 mini-e:SK6812-MINI-ED2, D18, D19, D20, D21, D22, D23, D24, D25
1Oledoled_0.91:PinHeader_1x04_P2.54mm_VerticalJ1
1XIAO-RP2040-DIPxiao:XIAO-RP2040-DIPU1

Questions

How big is the Arc-16 PCB?

It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Arc-16 use?

43 parts, built around the SK6812MINI-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 Arc-16 KiCad files?

From the Sameer-Kulhari/Arc-16 repository on GitHub, at the commit this page was made from: the board is PCB/Kicad.kicad_pcb and its schematic PCB/Kicad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Arc-16 design in my own project?

Its repository states no licence, so its author keeps all rights: ask Sameer-Kulhari before reusing the design.

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