Bill of Materials
The parts that go into a Kamoji board — electronics, connectors, and the printed/molded pieces. Quantities are per unit. See Components & Datasheets for what each major IC does, Schematics & PCB Files for how they connect, and PCB Assembly and 3D Printing for how the rest goes together.
note
This list is consolidated from internal production BOMs and isn't tied to any specific hardware revision — some parts (for example the supercapacitor) are only present on newer boards. See Hardware Revisions for what changed between revisions.
Part photos
Click a thumbnail for a full-size photo.
Major components
| Component | Package | Qty | Datasheet | Notes |
|---|---|---|---|---|
| ESP32-S3-WROOM-1U-N16R8 | Module | 1 | FCC ID: 2AC7Z-ESPS3WROOM1U | |
| IMU QMI8658A | — | 1 | — | |
| MEMS Microphone MSM261S3526Z0CM | — | 1 | — | |
| I2S Amplifier MAX98357A | QFN-16 | 1 | — | |
| Speaker, 15mm 8Ω, with header | Through-hole | 1 | — | — |
| 1.3" TFT LCD, ST7789, 240×240px | — | 1 | R7: soldered directly to the PCB. R8: mounted on a 12-pin FPC connector instead, for easy replacement without desoldering. | |
| 3.3V Regulator AMS1117 | SOT-223 | 1 | — | |
| LDR GL5528 | Through-hole | 1 | — | |
| TTP223 touch module | — | 3 | — | |
| USB Type-C connector | — | 1 | — | — |
| IPEX U.FL antenna, 4dBi, 5cm | Monopole | 1 | — | — |
| Magnetic pogo-pin connector, 4-pin | — | 1 | — | R8 only — unpopulated placeholder for future accessories |
| Supercapacitor, 2.5F, 17×8.5×21mm | — | 1 | — | R8 only |
Supporting electronics
Small ICs, discretes, and passives — links to general-purpose datasheets aren't especially useful here, so these are just listed with package and quantity.
| Component | Package | Qty |
|---|---|---|
| Schottky Diode B5817W | SOD-123 | 1 |
| Schottky Diode MBR120 | SOD-123 | 1 |
| Voltage Supervisor MAX809S | SOT-23 | 1 |
| S8050 NPN Transistor | SOT-23 | 1 |
| SMD Tactile Micro Switch | 3×4mm | 1–2 |
| LED, RGB | 2020 | 2 |
| LED, White | 0805 | 2 |
| Capacitor, 0.1µF (100nF) | 0805 | 5 |
| Capacitor, 1µF | 0805 | 2 |
| Capacitor, 10µF | 0805 | 7 |
| Capacitor, 10nF | 0805 | 2–3 |
| Resistor, 1KΩ | 0805 | 1–2 |
| Resistor, 4.7KΩ | 0805 | 5 |
| Resistor, 5.1KΩ | 0805 | 2–5 |
| Resistor, 10KΩ | 0805 | 4 |
| Resistor, 10Ω | 0805 | 1 |
| Resistor, 68Ω | — | 1 |
| Resistor, 100KΩ | 0805 | 2 |
| Ferrite Bead Inductor | 0805 | 2 |
Connectors & hardware
| Component | Notes |
|---|---|
| FPC Connector, 12-pin, 0.5mm pitch | Bottom-mount |
| 1.25mm socket header, 3-pin | ×3 |
| 1.25mm socket cable, 3-pin | ×3 |
| 1.25mm socket header, 2-pin | Speaker connection |
| 90° pin header, 1.27mm pitch, 15-pin | — |
Printed & molded parts
| Component | Notes |
|---|---|
| Inner frame | 3D-printed — assembly of PCB & touch sensors |
| Vysor frame | 3D-printed (Vysor V20, no acrylic) |
| Ears (light guides) | Molded in white opaque plastic; the ears are also the light guides (Ears.stl) |
| Outer case (helmet) | Cast/molded — swappable body (the helmet without its 2 clips) |