Slime88

zykrah·slime88

About the Slime88 PCB

Slime88 is an open source RP2040/RP2350 PCB design by zykrah, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 344.7 × 123.6 mm, with 225 components from 23 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the XC6206, SRV05-4 and W25Q128JVS. By type, the board carries 102 switches, 91 diodes, 17 capacitors, 7 resistors, 4 ICs and 2 connectors.

It belongs with the keyboards designs in this gallery.

From the project

A F13 TKL Multi-Layout Hotswap H88-Compat Type-C PCB

This board has now been prototyped! See IRL images below.

You can find the up-to-date VIAL firmware here.

UPDATE: The board is now also in qmk master. (This particular version will only be VIA compatible). It should automatically be detected in VIA.

Uses mousebites. Strength/functionality is untested.

~~All components should be basic components, apart from the MCU, fuse, and JST connector (extended).~~

Slime88, from the project README — From the project README

Main components on the Slime88

XC6206 RP2040 SRV05-4 W25Q128JVS

Slime88 bill of materials (BOM)

225 components, 23 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	XC6206	SOT-23	U1
1	RP2040	RP2040-QFN-56	U2
1	SRV05-4	SOT-23-6-routable	U3
1	W25Q128JVS	SOIC-8_5.23x5.23mm_P1.27mm	U4
1	12MHZ 12MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	C165948 USB_C	USB_C_Receptacle_HRO_TYPE-C-31-M-12	J1
1	JST-SH-4P	JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal	J3
1	500MA 500mA	Fuse_1206_3216Metric	F1
84	C5156480 ?	SW_MX_HS_1u	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +76
5	C5156480 ?	SW_MX_HS_1.5u	SW37, SW88, SW92, SW96, SW100
2	?	SW_MX_HS_1u	SW51, SW68
1	C5156480 ?	SW_MX_HS_1.75u_stp	SW55
2	C5156480 ?	SW_MX_HS_1.75u	SW56, SW83
8	C5156480 ?	SW_MX_HS_1.25u	SW70, SW87, SW89, SW91, SW95, SW97, SW99, SW101
91	C81598 D	D_SOD-123	D1, D2, D3, D4, D5, D6, D7, D8 +83
4	1UF 1uF	C_0402_1005Metric	C1, C5, C13, C14
10	100NF 100nF	C_0402_1005Metric	C2, C3, C6, C7, C8, C9, C10, C11 +2
1	10UF 10uF	C_0402_1005Metric	C4
2	22PF 22pF	C_0402_1005Metric	C15, C16
1	10K 10k	R_0402_1005Metric	R1

Show 3 more

Qty	Part	Footprint	Refs
2	27R	R_0603_1608Metric	R2, R3
2	1k	R_0402_1005Metric	R4, R5
2	5.1K 5.1k	R_0402_1005Metric	R6, R7

Slime88 design files

The KiCad project lives in the zykrah/slime88 repository on GitHub; these links point at the commit this page was built from.

Layoutslime88.kicad_pcb
Schematicslime88.kicad_sch
BOMmanufacturing/assembly/ANSI/ANSI_BOM-slime88.csv

Slime88: common questions

What microcontroller does the Slime88 use?

The Slime88 is built around the RP2040, from the RP2040/RP2350 family.

How big is the Slime88 PCB?

The Slime88 measures 344.7 × 123.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Slime88?

225 components, from 23 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 Slime88 design files?

From the zykrah/slime88 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 Slime88 design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which zykrah chose for the repository.

Can I test firmware for the Slime88 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.