Junyapad

junyali·Junyapad·pcb/junyapad.kicad_pcb

About the Junyapad PCB

Junyapad is an open source RP2040/RP2350 PCB design by junyali, published on GitHub under the MIT license. It is a 2-layer board measuring 92.9 × 52.4 mm, with 37 components from 8 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 16 diodes, 10 capacitors, 7 switches, 2 resistors, 1 IC and 1 connector.

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

From the project

A custom 6-key macropad featuring per-key RGB LEDs (with some extras :p) a 128x32 0.91" OLD screen, a rotary encoder switch and a cool semi-open case design!

PCB designed in KiCAD, case built in OnShape, and firmware built using QMK. Pretty proud of this as it's fully independent (no assistance from friends needed or Q's asked :DD)

Prices are a bit wonky since most products must be bought in bulk - this is an optimistic BOM

Junyapad, from the project README — From the project README

Main components on the Junyapad

XIAO-RP2040-DIP

Junyapad bill of materials (BOM)

37 components, 8 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	XIAO-RP2040-DIP	XIAO-RP2040-DIP	U1
1	OLED_128x32	OLED_128x32	J1
6	SW_Push_45deg	MX-Solderable-1U	SW1, SW2, SW3, SW4, SW5, SW6
1	RotaryEncoder_Switch	RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW9
6	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6
10	SK6812MINI	LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm	D7, D8, D9, D10, D11, D12, D13, D14 +2
10	C	C_Disc_D3.0mm_W1.6mm_P2.50mm	C1, C2, C3, C4, C5, C6, C7, C8 +2
2	4.7kΩ	R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal	R1, R2

Junyapad design files

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

Junyapad: common questions

What microcontroller does the Junyapad use?

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

How big is the Junyapad PCB?

The Junyapad measures 92.9 × 52.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Junyapad?

37 components, from 8 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 Junyapad design files?

From the junyali/Junyapad 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 Junyapad design in my own project?

Yes, under the terms of its MIT license, which junyali chose for the repository.

Can I test firmware for the Junyapad 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.