Bumwings v001 core

tubbytwins·bumwings-kbd·v001/pcb_core52840/bumwings_v001_core.kicad_pcb

Bumwings v001 core PCB layout, top view — open source board by tubbytwins

About the Bumwings v001 core PCB

Bumwings v001 core is an open source PCB design by tubbytwins, published on GitHub under the MIT license. It is a 2-layer board measuring 369.9 × 133.2 mm, with 138 components from 28 distinct parts.

Other key parts include the Core_nRF52840, USBLC6-2SC6, XC6220 and MCP73831. By type, the board carries 57 diodes, 54 switches, 11 resistors, 7 capacitors, 4 ICs and 2 connectors.

It belongs with the keyboards and iot & wireless designs in this gallery.

From the project

Ergonomic keyboard PCB design that uses the Waveshare RP2040-zero board.

I used JLCPCB to build the first prototype PCBs for this version. It works nicely.

See "info.md" for more information about the background and inspiration for this keyboard design.

"pcbcore52840" - 54-key hot-swap PCB based on the Waveshare Core52840 module "pcbrp2040zero" - 54-key hot-swap PCB based on Waveshare RP2040 "zero" controller "pcbxiao" - 54-key hot-swap PCB based on the Seeed Xiao controller "pcbxiao_s" - simplified 54-key direct-soldered PCB based on the Seeed Xiao controller

Bumwings v001 core, from the project README — From the project README

Main components on the Bumwings v001 core

Core_nRF52840 USBLC6-2SC6 XC6220 MCP73831

Bumwings v001 core bill of materials (BOM)

138 components, 28 distinct parts.

Qty	Part	Footprint	Refs
1	Core_nRF52840	Waveshare_Core_nRF52840_no_inner	U1
1	USBLC6-2SC6	SOT-23-6	U2
1	XC6220	SOT-23-5	U3
1	MCP73831	SOT-23-5	U4
1	AO3401A	SOT-23	Q1
1	HRO-TYPE-C-31-M-12	USB_C_connector_HRO-TYPE-C-31-M-12-device-fanout-handsolder	J1
1	PROG	PROG	J2
1	Battery_Cell	JST_GH_SM02B-GHS-TB_1x02-1MP_P1.25mm_Horizontal	BT1
1	500mA	Fuse_1206_3216Metric	F1
46	SW_PUSH	Kailh_PG1350_1u_hotswap	SW0, SW1, SW2, SW4, SW5, SW6, SW7, SW8 +38
6	SW_PUSH	Kailh_PG1350_1.5u_hotswap	SW3, SW25, SW27, SW29, SW31, SW55
2	SW_PUSH	Kailh_PG1350_2u_stab_hotswap	SW23, SW35
54	D	Diode_D_SOD-123	D0, D1, D2, D3, D4, D5, D6, D7 +46
1	1N5819W	Diode_D_SOD-123	D56
1	BLUE	LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder	D57
1	RED	LED_1206_3216Metric_Pad1.42x1.75mm_HandSolder	D58
4	10uF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C1, C2, C4, C5
1	1nF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C3
2	4.7uF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C6, C7
2	5.1K	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R1, R2

Show 8 more

Qty	Part	Footprint	Refs
1	4.7	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R3
1	1M	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R4
1	750k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R5a
1	56k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R5b
2	1k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R6, R7
1	2M	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R8
1	RPROG	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R9
1	100k	R_1206_3216Metric_Pad1.30x1.75mm_HandSolder	R10

Bumwings v001 core design files

The KiCad project lives in the tubbytwins/bumwings-kbd repository on GitHub; these links point at the commit this page was built from.

Bumwings v001 core: common questions

How big is the Bumwings v001 core PCB?

The Bumwings v001 core measures 369.9 × 133.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bumwings v001 core?

138 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bumwings v001 core design files?

From the tubbytwins/bumwings-kbd repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Bumwings v001 core design in my own project?

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

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