HardLabs

KPad

KaushikDuddala·KPad·PCB/KPad.kicad_pcb

KPad PCB layout, top view — open source RP2040/RP2350 board by KaushikDuddala

About the KPad PCB

KPad is an open source RP2040/RP2350 PCB design by KaushikDuddala, published on GitHub. It is a 2-layer board measuring 82 × 89 mm, with 36 components from 6 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 25 diodes, 9 switches, 1 IC and 1 connector.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

The KPad is a simple macropad made by me just to learn the process and hopefully make revisions or a full keyboard in the future!! This was made using KMK, KiCad, Fusion 360, and more.

The KPad is a simple macropad made by me just to learn the process and hopefully make revisions or a full keyboard in the future!! This was made using KMK, KiCad, Fusion 360, and more.

- 128x32 OLED with volume display - EC11 Encoder for Volume - 16 SK6812 LEDs for underglow!! - 8 keys + physical key in the ec11 - KMK firmware

- x9 1N4148 Diodes - x8 Cherry MX switches - x8 Keycaps - x1 EC11 Encoder w/ switch - x1 128x32 0.91" OLED screen - x1 Seeed Studio XIAO RP2040 - x16 SK6812 LEDs - x1 Case (2 3d printed halves) - x4 M3x16mm Screws - x4 M3x5mmx4mm heatset inserts

KPad, from the project README
From the project README

Main components on the KPad

XIAO-RP2040-DIP

KPad bill of materials (BOM)

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

QtyPartRefs
1
XIAO-RP2040-DIP
U1
1
CONN_01X04
Conn_01x04
J1
1
RotaryEncoder_Switch
SW1
8
SW_Push
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9
16
SK6812MINI
D1, D2, D3, D4, D5, D6, D7, D8 +8
9
1N4148
D17, D18, D19, D20, D21, D22, D23, D24 +1

KPad design files

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

KPad: common questions

What microcontroller does the KPad use?

The KPad is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the KPad PCB?

The KPad measures 82 × 89 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the KPad?

36 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 KPad design files?

From the KaushikDuddala/KPad 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 KPad design in my own project?

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

Can I test firmware for the KPad 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.

Similar boards