Changed

• Changed LDO from TPS73601DBV to TLV74318PDBVR.
• Changed R5 to C5.

Changelog

Changed

• Changed LDO from TPS73601DBV to TLV74318PDBVR.
• Changed R5 to C5.

Changelog

Changed

• Changed LDO from TPS73601DBV to TLV74318PDBVR.
• Added PCBA info.
• Update PCB silkscreen.

Changelog

JLCPCB PCBA files available. Not yet produced and tested.

Example firmware.
Compiled with QMK version 0.21.6.

Changed

• Update connector pin order.
• Changed mounting holes to NPTH.
• Reduce the board size to 23.5 x 33 mm.
• Reserved RESET pin pull up resistor added.
• Update PWM3360 footprint (reduce the size of the pads).

KiCad 7

Changed

• Update PWM3360 footprint (reduce the size of the pads).

KiCad 7

Changed

• Reduce the board size to 27 x 22.5 mm.
• Update PWM3360 footprint (reduce the size of the pads).

KiCad 7

Front	Back	Layers

Changed

• Replace JST GH 1.25 with FPC 0.5mm 8P connector.

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Rev 3.1 is designed to be used with ErgoSNM 2.1, if you prefer 2.54mm pin header instead of FPC connector, please refer to Rev 2.1.

Front	Back

Changed

• Replace 2.54mm pin header to JST GH 1.25 8Pin connector SM08B-GHS-TB(LF)(SN).
• Mounting hole change to M2 (∅2.2mm).
• Resize the board to 27 x 28 mm.
• Reference designator changed.

Added

• Add additional nRESET pull up resistor (R3). nRESET pin of PMW3360 has a built in weak pull up circuit.

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Rev 3.0 is designed to be used with ErgoSNM Rev 2.0, if you want 2.54mm pin header instead of JST GH 1.25 connector, please refer to Rev 2.1.

Compare, left is Rev 3.0, right is Rev 2.1:

Rev 3.0 tested.

Front	Back

Changed

• Align the optical lens of PWM3360 with the center of the board.
• Resize the board to 26.162 x 35.052 mm.
• Update PWM3360 footprint (reduce the size of the pads).

Refer to the README for more information. v2.1 tested.

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PCBWay sponsored and produced PMW3360 PCB v2.1 the PCBs looks pretty good thanks to PCBWay for supporting this project

I also published this on PCBWay's sharing platform if you want to order the PCB, you can do it directly from the page

The demo & unboxing video

PCBWay also sponsored my another project: MDBTMicro

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2023-02-27

• If you want it to work with a 3.3V MCU, then connect V_IN to 3.3V, and connect 1 and 2 pads of JP1 with solder let V_IO=V_IN.
• U2 LDO can be replace by RT9193-18GB, just change C3 and C4 to 1uF, change R4 to a 22nF or larger ceramic capacitor, and R3 don't install.
• nRESET pin of PMW3360 has a built in weak pull up circuit.