Oso module carrier

vamshikrishnaramasamy·oso-keyboard·hardware/kicad/oso-module-carrier/oso_module_carrier.kicad_pcb

Oso module carrier layout, top view — open source board by vamshikrishnaramasamy

About the Oso module carrier

Oso module carrier is an open source PCB design by vamshikrishnaramasamy, published on GitHub under the MIT license. It is a 2-layer board measuring 54 × 25 mm, with 9 components from 7 distinct parts.

Other key parts include the PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Left, PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Right and OSO_BAY_CONTACTS. By type, the board carries 3 connectors, 2 ICs, 2 capacitors, 1 module and 1 resistor.

It belongs with the keyboards designs in this gallery.

From the project

The first OSO module: a 54 x 25 mm carrier for the OSO75 bay that makes the whole Qwiic/STEMMA-QT ecosystem — and optionally a whole second ESP32 — pluggable into the keyboard. DRC-clean, fully routed (fab/osomodulecarriergerbers.zip`).

The first OSO module: a 54 x 25 mm carrier for the OSO75 bay that makes the whole Qwiic/STEMMA-QT ecosystem — and optionally a whole second ESP32 — pluggable into the keyboard. DRC-clean, fully routed (fab/osomodulecarriergerbers.zip`).

- Dumb mode: the keyboard's ESP32-S3 drives any Qwiic device plugged into J1/J2 over the bay I2C (GPIO41/42). Zero firmware on the module. - Smart mode: the XIAO owns the Qwiic (device) bus on D2/D3 and talks to the keyboard over the bay (link) bus on D4/D5 as an I2C peripheral; MODINT (keyboard GPIO47 / XIAO D1) is the attention line. The XIAO's USB-C faces…

Main components on the Oso module carrier

PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Left PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Right OSO_BAY_CONTACTS

Oso module carrier bill of materials (BOM)

9 components, 7 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Left	PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Left	U2
1	PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Right	PinSocket_1x07_P2.54mm_Vertical_SMD_Pin1Right	U3
1	OSO_BAY_CONTACTS		MOD1
2	JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal	JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal	J1, J2
1	PinHeader_1x04_P2.54mm_Vertical	PinHeader_1x04_P2.54mm_Vertical	J4
2	C_0603_1608Metric	C_0603_1608Metric	C1, C2
1	5.1K R_0603_1608Metric	R_0603_1608Metric	R1

Oso module carrier design files

The KiCad project lives in the vamshikrishnaramasamy/oso-keyboard repository on GitHub; these links point at the commit this page was built from.

Oso module carrier: common questions

How big is the Oso module carrier?

The Oso module carrier measures 54 × 25 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Oso module carrier?

9 components, from 7 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 Oso module carrier design files?

From the vamshikrishnaramasamy/oso-keyboard repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Oso module carrier design in my own project?

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

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