> ## Documentation Index
> Fetch the complete documentation index at: https://docs.omi.me/llms.txt
> Use this file to discover all available pages before exploring further.

# Open Source Hardware

> Complete open-source design files for the Omi Consumer — PCB schematics, Gerbers, mechanical STEP files, BOM, and assembly guides.

## Omi Consumer Open Source Hardware

The Omi Consumer is fully open source. All design files needed to study, modify, manufacture, and sell the hardware are available under the MIT license.

<Frame caption="Omi Consumer — all components identified">
  <img src="https://raw.githubusercontent.com/BasedHardware/omi/main/omi/hardware/consumer/assembly/photos/materials-labelled-exploded-view.jpg" />
</Frame>

<Info>
  **What you'll need to build an Omi:**

  * **Tools:** Soldering station with hot air, solder paste + stencils, multimeter, tweezers, UV lamp (for adhesive)
  * **Software:** KiCad or Altium (PCB), FreeCAD or Fusion 360 (mechanical), nRF Connect SDK (firmware)
  * **Accounts:** PCB fabricator (JLCPCB/PCBWay), component distributor (Mouser/DigiKey/LCSC)
  * **Skills:** SMT soldering (QFN packages), basic mechanical assembly, firmware flashing via SWD
  * **Budget:** \~\$30-50 per unit in small quantities (PCBs + components + enclosure, excluding tools)
  * **Time:** 2-3 weeks (PCB fabrication) + 1-2 hours (assembly per unit)
</Info>

<CardGroup cols={2}>
  <Card title="Electronics" icon="microchip" href="/doc/hardware/consumer/electronics">
    PCB schematics, Altium source, Gerber files for mainboard, charger, and FPC
  </Card>

  <Card title="Mechanical & Packaging" icon="cube" href="/doc/hardware/consumer/mechanical">
    STEP files for enclosure, charger, foam inserts, and packaging
  </Card>

  <Card title="Assembly & BOM" icon="screwdriver-wrench" href="/doc/hardware/consumer/assembly">
    88-component BOM with manufacturer part numbers and assembly photos
  </Card>

  <Card title="License" icon="scale-balanced" href="/doc/hardware/consumer/license">
    MIT license — use, modify, and distribute freely
  </Card>
</CardGroup>

***

## Quick Specs

| Component   | Specification                          |
| ----------- | -------------------------------------- |
| Processor   | nRF5340 dual-core Bluetooth LE SoC     |
| Wi-Fi       | nRF7002 Wi-Fi 6 chip                   |
| Audio       | 2x TDK T5838 top-port PDM microphones  |
| Storage     | 8GB NAND Flash (CSNP4GCR01)            |
| IMU         | LSM6DS3TR-C 6-axis                     |
| Battery     | 3.7V 150mAh LiPo                       |
| Charging    | BQ25101 charger IC, magnetic pogo pins |
| Form Factor | 25.5mm diameter wearable pendant       |

***

## Repository Structure

| Directory                                                                                                                    | Contents                       |
| ---------------------------------------------------------------------------------------------------------------------------- | ------------------------------ |
| [`electrical/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical)                             | PCB design files               |
| [`electrical/mainboard/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/mainboard)         | nRF5340 + nRF7002 main board   |
| [`electrical/charger-board/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/charger-board) | Magnetic charger dock          |
| [`electrical/fpc-board/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/fpc-board)         | Flexible printed circuit       |
| [`bom/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/bom)                                           | Bill of Materials (CSV + XLSX) |
| [`mechanical/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/mechanical)                             | Enclosure & parts (STEP files) |
| [`mechanical/assemblies/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/mechanical/assemblies)       | Full device + charger assembly |
| [`mechanical/parts/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/mechanical/parts)                 | Individual parts by process    |
| [`mechanical/drawings/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/mechanical/drawings)           | 2D technical drawings          |
| [`assembly/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/assembly)                                 | Assembly photos & instructions |
| [`packaging/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/packaging)                               | Retail packaging CAD & photos  |

***

## Build Journey

<Steps>
  <Step title="Order PCBs (Week 1)">
    Upload Gerber ZIPs to your PCB manufacturer. Order all 3 boards together to save on shipping.

    <CardGroup cols={3}>
      <Card title="Mainboard Gerbers" icon="download" href="https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/mainboard/gerbers">
        4-layer FR4, 0.6mm, 21x21mm, ENIG, blind/buried vias
      </Card>

      <Card title="Charger Gerbers" icon="download" href="https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/charger-board/gerbers">
        2-layer FR4, 1.0mm, 13x20mm, ENIG
      </Card>

      <Card title="FPC Gerbers" icon="download" href="https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/fpc-board/gerbers">
        2-layer polyimide, 0.3mm, 29x13mm
      </Card>
    </CardGroup>

    <Tip>Order 5-10 boards minimum — MOQ is usually 5 and extras cost very little. You'll want spares for rework practice.</Tip>
  </Step>

  <Step title="Source Components (Week 1)">
    Use the [BOM CSV](https://github.com/BasedHardware/omi/blob/main/omi/hardware/consumer/bom/omi-bom.csv) to order from distributors. The MPN column has exact manufacturer part numbers.

    <Warning>
      **Long-lead items to order first:** nRF5340-CLAA (SoC), nRF7002-CEAA-R7 (Wi-Fi), CSNP4GCR01-DPW (8GB Flash). These can take 2-4 weeks from Mouser/DigiKey. Check LCSC for faster China-based shipping.
    </Warning>

    <Tip>The 150mAh LiPo battery (D16×H6.1mm) is a custom form factor. Search for "GRP1654M1" or order the closest match and verify dimensions.</Tip>
  </Step>

  <Step title="Manufacture Enclosure (Week 1-2)">
    Parts are organized by manufacturing process in [`mechanical/parts/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/mechanical/parts).

    <Tabs>
      <Tab title="CNC Parts" icon="gears">
        Aluminium covers (Case A + B) and copper touch pins. Send STEP files to a CNC vendor. Minimum order typically 10-50 units.

        <Note>For prototyping, you can 3D print the covers in SLA resin first to verify fit before committing to CNC.</Note>
      </Tab>

      <Tab title="3D Printed Parts" icon="print">
        Frame, LED guide, charger cases, and enhance plate can all be SLA printed. Use white/translucent resin for light guide parts.

        <Tip>If you have an SLA printer (Formlabs, Elegoo), this is the fastest path — print overnight and assemble the next day.</Tip>
      </Tab>

      <Tab title="Injection Molding" icon="fill-drip">
        The wrapper/shell is injection molded in PC+ABS for production. For prototyping, SLA print it instead.

        <Note>Injection molding only makes sense at 500+ units. Below that, SLA or CNC is more economical.</Note>
      </Tab>
    </Tabs>
  </Step>

  <Step title="Assemble PCBs (Week 2-3)">
    Apply solder paste with stencil, place components, reflow. See the [full assembly guide](/doc/hardware/consumer/assembly).

    <Warning>
      **Critical:** The nRF5340 (WLCSP-95, 4.4x4.0mm) and nRF7002 (WLCSP-81, 3.75x3.4mm) are fine-pitch wafer-level packages. You MUST use solder paste + stencil + reflow (hot air or oven). Do not attempt hand soldering these ICs.
    </Warning>
  </Step>

  <Step title="Mechanical Assembly">
    <Frame caption="Components ready for assembly">
      <img src="https://raw.githubusercontent.com/BasedHardware/omi/main/omi/hardware/consumer/assembly/photos/components-disassembled.jpg" />
    </Frame>

    Follow the [assembly reference](/doc/hardware/consumer/assembly) to combine PCB, battery, enclosure, and magnets into the final device.
  </Step>

  <Step title="Flash & Test">
    Flash firmware via SWD debug port using a J-Link or nRF DK. Follow the [firmware compilation guide](/doc/developer/firmware/Compile_firmware).

    <Check>
      **Verification checklist:** BLE advertising visible in nRF Connect app, both microphones recording audio, Wi-Fi scanning networks, IMU reporting orientation, LED cycling RGB, charger detecting dock contact.
    </Check>
  </Step>
</Steps>