HardLabs

Omnipad v4

neilmenon13·omnipad_v4·pcb/kicad/macropad_v3.kicad_pcb

Omnipad v4 PCB layout, top view — open source RP2040/RP2350 board by neilmenon13

About the Omnipad v4 PCB

Omnipad v4 is an open source RP2040/RP2350 PCB design by neilmenon13, published on GitHub. It is a 2-layer board measuring 81 × 81 mm, with 35 components from 6 distinct parts.

Its main chip is the RP2040_ZERO, from the RP2040/RP2350 family. By type, the board carries 16 diodes, 14 switches, 4 capacitors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

Omni Pad is a compact 3×4 macropad PCB with 12 MX-compatible keys, two push-capable rotary encoders, and addressable RGB underglow. It is built around an RP2040 Zero and is intended for custom shortcuts, media controls, editing workflows, and other keyboard automation.

Omni Pad is a compact 3×4 macropad PCB with 12 MX-compatible keys, two push-capable rotary encoders, and addressable RGB underglow. It is built around an RP2040 Zero and is intended for custom shortcuts, media controls, editing workflows, and other keyboard automation.

- 12 MX-compatible soldered keys arranged in a 3×4 matrix - 2 × Bourns PEC11R-4215F-S0024 rotary encoders with push switches - RP2040 Zero controller - 4 × WS2812B addressable RGB LEDs for underglow - Through-hole key switches and encoders - Hand-solder-friendly 0805 capacitors - KiCad schematic and PCB layout - Gerber and…

Main components on the Omnipad v4

RP2040_ZERO

Omnipad v4 bill of materials (BOM)

35 components, 6 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040_ZERO
RP2040_Zero
U2
12
~
S1, S2, S3, S4, S5, S6, S7, S8 +4
2
PEC11R-4215F-S0024
Bourns Inc.
S13, S14
12
~
D1, D2, D3, D4, D5, D6, D7, D8 +4
4
WS2812B
D13, D14, D15, D16
4
C
C1, C2, C3, C4

Omnipad v4 design files

The KiCad project lives in the neilmenon13/omnipad_v4 repository on GitHub; these links point at the commit this page was built from.

Omnipad v4: common questions

What microcontroller does the Omnipad v4 use?

The Omnipad v4 is built around the RP2040_ZERO, from the RP2040/RP2350 family.

How big is the Omnipad v4 PCB?

The Omnipad v4 measures 81 × 81 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Omnipad v4?

35 components, from 6 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Omnipad v4 design files?

From the neilmenon13/omnipad_v4 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Omnipad v4 design in my own project?

The repository has no license, so all rights stay with neilmenon13. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Omnipad v4 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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