> ## 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 > 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. ![](https://raw.githubusercontent.com/BasedHardware/omi/main/omi/hardware/consumer/assembly/photos/materials-labelled-exploded-view.jpg) Omi Consumer: all components identified > [!NOTE] > > **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 (free; all shipped PCB sources are KiCad 9 projects, despite the "altium" folder names), 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:** Component costs vary by supplier and quantity; the BOM in the hardware files lists every part > * **Time:** 2-3 weeks (PCB fabrication) + 1-2 hours (assembly per unit) > **[Electronics](https://docs.omi.me/doc/hardware/consumer/electronics.md)** > > PCB schematics, KiCad source, Gerber files for mainboard, charger, and FPC > **[Mechanical and packaging](https://docs.omi.me/doc/hardware/consumer/mechanical.md)** > > STEP files for enclosure, charger, foam inserts, and packaging > **[Assembly and BOM](https://docs.omi.me/doc/hardware/consumer/assembly.md)** > > 88-component BOM with manufacturer part numbers and assembly photos > **[License](https://docs.omi.me/doc/hardware/consumer/license.md)** > > MIT license: use, modify, and distribute freely ## 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 | 4Gbit (512MB) SD 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 and parts (STEP files) | | [`mechanical/assemblies/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/mechanical/assemblies) | Full device and 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 and instructions | | [`packaging/`](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/packaging) | Retail packaging CAD and photos | ## Build journey **1. Order PCBs (Week 1)** Upload Gerber ZIPs to your PCB manufacturer. Order all 3 boards together to save on shipping. > **[Mainboard Gerbers](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/mainboard/gerbers)** > > 4-layer FR4, 0.6mm, 21x21mm, ENIG, blind/buried vias > **[Charger Gerbers](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/charger-board/gerbers)** > > 2-layer FR4, 1.0mm, 13x20mm, ENIG > **[FPC Gerbers](https://github.com/BasedHardware/omi/tree/main/omi/hardware/consumer/electrical/fpc-board/gerbers)** > > 2-layer polyimide, 0.3mm, 29x13mm > [!TIP] > > Order 5-10 boards. The minimum order is usually 5, and extras cost very little. You'll want spares for rework practice. **2. 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 (4Gbit/512MB Flash). These can take 2-4 weeks from Mouser/DigiKey. Check LCSC for faster China-based shipping. > [!TIP] > > The 150mAh LiPo battery (D16×H6.1mm) is a custom form factor. Search for "GRP1654M1" or order the closest match and verify dimensions. **3. Manufacture the 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). **CNC parts** Aluminum 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. **3D printed parts** 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. **Injection molding** 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. **4. Assemble PCBs (Week 2-3)** Apply solder paste with stencil, place components, reflow. See the [full assembly guide](https://docs.omi.me/doc/hardware/consumer/assembly.md). > [!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. **5. Mechanical assembly** ![](https://raw.githubusercontent.com/BasedHardware/omi/main/omi/hardware/consumer/assembly/photos/components-disassembled.jpg) Components ready for assembly Follow the [assembly reference](https://docs.omi.me/doc/hardware/consumer/assembly.md) to combine PCB, battery, enclosure, and magnets into the final device. **6. Flash and test** Flash firmware via SWD debug port using a J-Link or nRF DK. Follow the [firmware compilation guide](https://docs.omi.me/doc/developer/firmware/Compile_firmware.md). > [!TIP] > > **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. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.