Rabid40

Cujo26·Rabid40·pcb/rabid40/rabid40.kicad_pcb

About the Rabid40 PCB

Rabid40 is an open source RP2040/RP2350 PCB design by Cujo26, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 285.8 × 76.2 mm, with 132 components from 36 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q128JVS, XC6206PXXXMR-REGULATOR_LINEAR and MX_SW_solder. By type, the board carries 50 diodes, 18 capacitors, 6 resistors, 4 ICs, 3 crystals and 3 connectors.

It belongs with the keyboards designs in this gallery.

From the project

40% keyboard with HHKB inspiration - first attempt at a board

Thanks to Fe, Smollchungus and Tradesplatter for all the PCB design tips and advice

Main components on the Rabid40

RP2040 W25Q128JVS XC6206PXXXMR-REGULATOR_LINEARMX_SW_solder

Rabid40 bill of materials (BOM)

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

Qty	Part	Footprint	Refs
1	RP2040	RP2040-QFN-56	U1
1	W25Q128JVS	SOIC-8_5.23x5.23mm_P1.27mm	U2
1	XC6206PXXXMR-REGULATOR_LINEAR XC6206PxxxMR-Regulator_Linear	SOT-23	U3
1	MX_SW_solder	SW_MX_1u	U4
2	MX_SW_solder	SW_MX_1u	A1, M1
1	MX_SW_solder	SW_MX_1u	Q1
2	MX_SW_solder	SW_MX_1u	X1, Y2
1	12MHZ 12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	CONN_01X04 Conn_01x04	JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal	J2
2	MX_SW_solder	SW_MX_1u	J3, P1
28	MX_SW_solder	SW_MX_1u	'1, /1, ;1, <1, >1, B1, E1, ENTER1 +20
2	MX_SW_solder	SW_MX_1.5u	BSPC1, TAB1
1	MX_SW_solder	SW_MX_1.75u	CTRL1
1	500MA 500mA	Fuse_1206_3216Metric	F1
1	MX_SW_solder	SW_MX_1u	F2
1	MX_SW_solder	SW_MX_1u	H1
1	MX_SW_solder	SW_MX_1u	K1
1	MX_SW_solder	SW_MX_1u	S1
1	MX_SW_solder	SW_MX_1.75u_stp	STEPCTRL1
2	MX_stab	STAB_MX_2.25u	Stab_Enter1, Stab_LShift1

Show 16 more

Qty	Part	Footprint	Refs
1	MX_stab	STAB_MX_2.75u	Stab_RShift1
1	MX_stab	STAB_MX_P_2.25u	Stab_Spc2.25
1	MX_stab	STAB_MX_P_2.75u	Stab_Spc2.75
1	MX_stab	STAB_MX_P_7u	Stab_Spc7u1
1	MX_SW_solder	SW_MX_1u	T1
49	1N4148W	D_SOD-123	D1, D2, D3, D4, D5, D6, D7, D8 +41
1	MX_SW_solder	SW_MX_1u	D46
1	MX_SW_solder	SW_MX_1u	L1
4	1UF 1uF	C_0402_1005Metric	C1, C5, C11, C15
10	100NF 100nF	C_0402_1005Metric	C2, C3, C6, C7, C8, C9, C10, C12 +2
1	10UF 10uF	C_0402_1005Metric	C4
2	22PF 22pF	C_0402_1005Metric	C16, C17
1	MX_SW_solder	SW_MX_1u	C18
2	27R	R_0603_1608Metric	R1, R2
3	1k	R_0402_1005Metric	R3, R4, R5
1	MX_SW_solder	SW_MX_1u	R6

Rabid40 design files

The KiCad project lives in the Cujo26/Rabid40 repository on GitHub; these links point at the commit this page was built from.

Rabid40: common questions

What microcontroller does the Rabid40 use?

The Rabid40 is built around the RP2040, from the RP2040/RP2350 family.

How big is the Rabid40 PCB?

The Rabid40 measures 285.8 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Rabid40?

132 components, from 36 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 Rabid40 design files?

From the Cujo26/Rabid40 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 Rabid40 design in my own project?

Yes, under the terms of its AGPL-3.0 license, which Cujo26 chose for the repository.

Can I test firmware for the Rabid40 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.