Das4-controller

brandonrc·das4-controller·hardware/das4-controller.kicad_pcb

About the Das4-controller PCB

Das4-controller is an open source RP2040/RP2350 PCB design by brandonrc, published on GitHub under the MIT license. It is a 4-layer board measuring 51.2 × 94 mm, with 58 components from 21 distinct parts.

Its main chip is the RP2350B, from the RP2040/RP2350 family. Other key parts include the CH334R, W25Q128JVS and ME6211C33M5G-N. By type, the board carries 37 capacitors, 10 resistors, 4 ICs, 2 crystals, 2 switches and 1 transistor.

It belongs with the keyboards designs in this gallery.

From the project

Open-source RP2350B replacement controller board for the Das Keyboard 4 Professional (KiCad 10)

An open-source replacement controller board for the Das Keyboard 4 Professional: same outline, same holes, same connectors, but with an RP2350B you can flash with your own firmware (pico-sdk today, KMK/CircuitPython, QMK once it supports the RP2350B). It keeps the two USB-A ports (as a USB 2.0 hub), the volume knob, the NUM/CAPS/SCROLL LEDs (now RGB, any colour) and the five buttons. Every button gets its own GPIO, so you can make them do whatever you like.

Das4-controller, from the project README — From the project README

Main components on the Das4-controller

RP2350B CH334R W25Q128JVS ME6211C33M5G-N

Das4-controller bill of materials (BOM)

58 components, 21 distinct parts.

Qty	Part	Footprint	Refs
1	RP2350B	QFN-80_L10.0-W10.0-P0.40-TL-EP3.4	U1
1	CH334R	QSOP-16_L4.9-W3.9-P0.64-LS6.0-BL	U2
1	W25Q128JVS	SOIC-8_L5.3-W5.3-P1.27-LS8.0-BL	U3
1	ME6211C33M5G-N	SOT-23-5_L3.0-W1.7-P0.95-LS2.8-BL	U4
1	2N7002	SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR	Q1
2	12MHz	CRYSTAL-SMD_4P-L3.2-W2.5-BL	Y1, Y2
1	USB-C	USB-C_SMD-TYPE-C-31-M-12_1	J1
1	BOOTSEL	SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL_H1.5	SW6
1	RESET	SW-SMD_4P-L5.1-W5.1-P3.70-LS6.5-TL_H1.5	SW7
1	3.3uH	IND-SMD_L2.0-W1.6_AOTA-B201610S3R3-101-T	L1
3	22u	C_0805_2012Metric	C1, C9, C11
22	100n	C_0402_1005Metric	C2, C7, C10, C12, C35, C36, C37, C105 +14
5	10u	C_0603_1608Metric	C3, C4, C5, C8, C190
1	1u	C_0402_1005Metric	C6
4	4.7u	C_0402_1005Metric	C161, C164, C165, C166
2	15p	C_0402_1005Metric	C230, C231
2	5.1k	R_0402_1005Metric	R1, R2
4	1k	R_0402_1005Metric	R10, R231, R302, R303
1	33	R_0402_1005Metric	R161
2	22	R_0402_1005Metric	R266, R267

Show 1 more

Qty	Part	Footprint	Refs
1	10k	R_0402_1005Metric	R301

Das4-controller design files

The KiCad project lives in the brandonrc/das4-controller repository on GitHub; these links point at the commit this page was built from.

Layouthardware/das4-controller.kicad_pcb

Das4-controller: common questions

What microcontroller does the Das4-controller use?

The Das4-controller is built around the RP2350B, from the RP2040/RP2350 family.

How big is the Das4-controller PCB?

The Das4-controller measures 51.2 × 94 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Das4-controller?

58 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Das4-controller design files?

From the brandonrc/das4-controller repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Das4-controller design in my own project?

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

Can I test firmware for the Das4-controller 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.