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USlime PCB Module

ReSummit·uSlime·uSlime_PCB_Module/uSlime_PCB_Module.kicad_pcb

USlime PCB Module layout, top view — open source ESP32 board by ReSummit
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About the USlime PCB Module

USlime PCB Module is an open source ESP32 PCB design by ReSummit, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 25 × 22.6 mm, with 27 components from 20 distinct parts.

Its main chip is the BNO085, from the ESP32 family. Other key parts include the MSK-12C02_SMD_SPDT_SWITCH, AP2112K-3.3TRG1 and MCP73831T-2ACI/OT. By type, the board carries 8 resistors, 6 capacitors, 4 ICs, 4 connectors, 2 LEDs and 2 diodes.

From the project

Micro form of SlimeVR trackers using BNO085

Micro form of SlimeVR trackers using BNO085 and ESP32-C6-MINI module, as small as possible

Limited to 1 sided PCB but utilizes two layer to achieve a maximal dimension of 25mm x 28mm (including the ESP32-C6-MINI module)

Also includes some test points if you wanna add idk RGB lights to it or something like that lol

Currently, v1.0.0 is the preferred PCB version and is listed in the releases. As a note, your red charge LED will always be on while the device is on. While this makes for a good indicator that your tracker is on, some may not like that the LED is always on. v1.1.0 fixes this but…

USlime PCB Module, from the project README
From the project README

Main components on the USlime PCB Module

BNO085MSK-12C02_SMD_SPDT_SWITCHAP2112K-3.3TRG1MCP73831T-2ACI/OT

USlime PCB Module bill of materials (BOM)

27 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
BNO085
ESP32-C6-MINI-1
U1
1
MSK-12C02_SMD_SPDT_SWITCH
U2
1
AP2112K-3.3TRG1
U3
1
MCP73831T-2ACI/OT
U4
1
X1502WR-05K-N0SN
CN1
1
1.25T-2AW
CN2
1
CONN_01X05
USB_C_Receptacle_USB2.0_14P
J1
1
Conn_01x05
J2
1
SW_Push
RESET1
2
LED
CHRG1, STAT1
2
D
D1, D2
2
0.1UF
0.1uF
C1, C2
2
0.1UF
10uF
C3, C4
2
10μF
C5, C7
2
10K
100k
R1, R2
1
2.2K
180k
R3
1
2.2K
1k
R4
1
10K
2k
R5
2
2.2K
5.1k
R6, R7
1
1k
R8

USlime PCB Module design files

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

USlime PCB Module: common questions

What microcontroller does the USlime PCB Module use?

The USlime PCB Module is built around the BNO085, from the ESP32 family.

How big is the USlime PCB Module?

The USlime PCB Module measures 25 × 22.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the USlime PCB Module?

27 components, from 20 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 USlime PCB Module design files?

From the ReSummit/uSlime 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 USlime PCB Module design in my own project?

Yes, under the terms of its GPL-3.0 license, which ReSummit chose for the repository.

Can I test firmware for the USlime PCB Module without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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