Project Ezra

A screenless, voice-first companion phone in active industrial-design development.

Ezra is a pocketable AI-native communication and identity device that removes the screen entirely. It does not run apps, show feeds, or create an attention surface. It replaces the smartphone's core jobs - calls, messages, navigation, reminders, authentication, ambient awareness, and emergency utility - with voice, biometric presence, haptics, warmth, and light.

The current design direction is a warm translucent KRION/Corian mineral skip-stone form: calm from the outside, technically dense inside, and built around a clear sensor and packaging plan.

Brought To You By The Studio

Project Ezra comes from The Studio by Good Industries: the hardware, AI, and product workshop inside The Good Project. The Studio is where the concept, industrial design, Blender exploration, Onshape packaging, prototype BOM, and investor demo plan are being pulled into one buildable product direction.

Current Design Progress

Area	Current state	Source
Origin	Brought to you by The Studio, a Good Industries project inside The Good Project	studio.png
Hero render	Warm crystalline mineral body with amber internal and perimeter glow	Project Ezra.png
Phone plan	Top face, underside, internal stack, sensor map, and BOM callouts	project-ezra-phone-plan.svg
Blender form model	Parametric skip-stone body, material system, glow target, optional feature/package guides	ezra_golden_phone/
Blender exports	GLB checked in; OBJ/STL/MTL generated locally for CAD handoff	ezra_golden_phone/exports/
Design scenes	Morning guidance, pre-meeting calm, evening wind-down, walk prompt, emotional recovery, and bottom light platform renders	ezra_golden_phone/renders/
Onshape package	Product assembly, exploded technical assembly, part studios, and scene assemblies recorded for engineering packaging	ezra_golden_phone/ENGINEERING_MANIFEST.md
Prototype BOM	Procurement and CAD packaging BOM with priorities, estimated pricing, and Onshape reference notes	ezra_golden_phone/PROTOTYPE_BUILD_PLAN.md
Shape iterations	Twelve silhouette studies used to converge on the skip-stone direction	ezra_golden_phone/shape_iterations/
Earlier nautilus shell	Prior Blender/MCP shell direction and exports retained as design lineage	ezra_nautilus/
Architecture diagram	System-level hardware/software relationship map	system-architecture.svg
Full spec	Product, hardware, software, identity, privacy, and mechanical packaging spec	SPEC.md
Hardware spec	Component tables, power budget, PCB architecture, mechanical interface points	hardware.md

Main Phone Plan

Exterior Envelope

Parameter	Current target
Length	116 mm
Width	64 mm palm datum, 60 mm visual head taper
Thickness	15 mm crowned center / 5.5 mm visual edge
Weight	165 g prototype target
Material	Warm white KRION/Corian mineral composite
Form logic	Flattened nautilus / skip-stone superellipse, Lamé exponent n = 2.5
Crown point	71.7 mm from trailing end, phi-derived
Exterior rule	No screen, camera, visible buttons, screw heads, app surface, or display-like notification region

The object keeps visual symmetry while hiding tactile asymmetry: a slightly narrower head, fuller tail, thumb-side shelf, rounder finger sweep, rear-biased crown, and underside contact patch that helps orient the device in hand.

Functional Zones

Zone	Placement	Purpose
Sapphire PPG eye	Lower front / palm face	Owner authentication, pickup detection, passive regulation signals
Microphone array	Four-point perimeter grid	Wake word, beamforming, calls, voice interface
Speaker	Upper face or head edge	Voice response and calls
Ambient glow	0.6 mm perimeter seam or thinned mineral edge	Quiet status, charging, contact presence, no display semantics
Thermal presence	Lower rear face	Warmth notification and regulation cue
Haptic actuator zone	Palm-biased internal chassis	Tactile language for calls, navigation, alerts, breathing cadence
Bottom light platform	Underside	Wide flood, focused flashlight/throw, bedside/emergency light
UV-A inspection	Trailing underside	Optional surface inspection demo mode
Qi2/MagSafe package	Hidden rear center	Wireless charging alignment without exterior ring language
USB-C	Bottom short edge	Prototype service and charging
Antenna keepout	Outer perimeter	LTE, WiFi, and Bluetooth clearance away from metal masses

Bill of Materials Snapshot

The full BOM is in ezra_golden_phone/PROTOTYPE_BUILD_PLAN.md. This is the current demo-critical subset driving the Blender and Onshape packaging pass.

Category	Prototype component	Qty	Priority	Packaging note
Compute	Raspberry Pi CM4, 4GB RAM, 32GB eMMC, WiFi	1	P1	Main processor volume
Compute	CM4 IO board / breakout carrier	1	P1	Prototype carrier, larger than production board
Compute	Coral USB Accelerator / Edge TPU	1	P2	Secondary AI compute and thermal allowance
Cellular	Quectel EC21 Mini PCIe LTE module	1	P1	SIM access and RF keepout
Cellular	LTE adhesive flex antenna	1	P2	Perimeter antenna path
Biometric	MAX30102 PPG / SpO2 / HR breakout	2	P1	Underside optical window and isolated light path
Biometric	AD5940 EDA board	1	P2	Conductive stress/contact sensing option
Biometric	Infineon SLB 9670 TPM 2.0	1	P2	PPG template and passkey key storage
Environmental	Sensirion SEN55	1	P2	Seam-integrated air path and membrane
Environmental	Bosch BMP390	1	P2	Pressure/temperature vent path
Haptic	DRV2605L haptic driver breakout	2	P1	Waveform driver near actuator harness
Haptic	10 mm coin LRA actuators	4	P1	Thumb, palm, left edge, right edge zones
Thermal	20 x 20 mm Peltier TEC element	1	P1	Palm warmth zone with thermal spreader
Thermal	DRV8833 dual H-bridge	1	P1	TEC driver and heat/cool control
Light	Cree XHP50.3 / COB primary LED	1	P1	Floodlight thermal path and diffuser
Light	Ledil ANGIE-S TIR optic	1	P2	Directional torch optic volume
Light	Nichia NCSU334A 365 nm UV-A LED	2	P1	Shielded underside inspection emitters
Voice	Knowles SPH0645LM4H MEMS mic breakout	2	P1	Hidden mic pores and acoustic channels
Voice	MAX98357A I2S amplifier + speaker	1	P1	Speaker cavity and acoustic slit
Power	BQ25895 USB-C charger / power path board	1	P1	Charger board, battery path, USB-C route
Power	4000 mAh single-cell LiPo battery	1	P1	Largest prototype internal mass
Power	USB-C breakout board	1	P2	Gasketed port
Shell	White Corian/KRION shell stock	1	P2	CNC shell and sensor drilling

Sensor And Subsystem Specs

Identity

Ezra uses a MAX30102/MAX30101 PPG sensor behind a 12 mm sapphire optical window. On pickup, the device captures pulse waveform features for owner verification and session continuity. The same sensor family also supports non-medical regulation intelligence such as heart-rate trend, HRV trend, recovery signal, sympathetic arousal, circulation quality, respiratory rhythm trend, and baseline drift.

Security target: PPG template and passkey material stay on device, backed by a TPM/security element. Ezra can act as a FIDO2/WebAuthn authenticator where PPG verification supplies user verification.

Voice And Calls

The audio stack is a four-microphone MEMS perimeter array, wake-word DSP, speech ASR, LLM/TTS response loop, MAX98357A I2S amplifier, and a 2 W speech-focused speaker. The device is designed for phone calls, voice messages, reminders, and hands-free assistance without visual UI.

Haptic, Thermal, And Light Language

The non-screen interface uses:

Channel	Hardware	Example behavior
Haptic	LRA actuators + DRV2605L	Incoming call, navigation waypoint, breath cadence, urgent alert
Thermal	Thin TEC or warming plate	Warmth from designated contact, regulation cue
Ambient glow	RGBW/amber perimeter light pipe	Quiet status, charging, presence
Utility light	Bottom flood/throw/flood bands	Bedside mode, emergency light, work-surface illumination
UV-A	Shielded 365 nm emitters	Inspection demo mode

Power And Packaging

The prototype BOM starts with a 4000 mAh LiPo because it is immediately buildable. The product target is a custom 5500-6500 mAh geometry under the crowned shell, with USB-C PD, hidden Qi2/MagSafe-style receiver coil, magnet ring, fuel gauge, PMIC, DC-DC rails, and perimeter antenna keepouts.

Blender Design Package

The current Blender model is generated from ezra_golden_phone/scripts/build_ezra_golden_phone.py. The script encodes the live exterior dimensions, crown offset, superellipse body, tactile asymmetry, foot placement, stone material, amber glow, bottom light platform, and optional packaging/feature guides.

Run:

blender --background --python ezra_golden_phone/scripts/build_ezra_golden_phone.py -- --save-blend --export-all --render-hero

Useful review flags:

--show-features
--show-packaging

Current checked-in/generated Blender assets:

Asset	Purpose
ezra_golden_phone/ezra_golden_phone.blend	Blender source scene
ezra_golden_phone/exports/ezra_golden_phone.glb	Portable 3D review export
ezra_golden_phone/exports/ezra_golden_phone.obj	Mesh export for CAD handoff
ezra_golden_phone/exports/ezra_golden_phone.stl	Fabrication/CAD handoff export
ezra_golden_phone/renders/hero_internal_glow.png	Current glow/form hero render
ezra_golden_phone/renders/bottom_light_platform.png	Underside light-platform review
ezra_golden_phone/renders/morning_guidance_bedside.png	Morning pickup scene
ezra_golden_phone/renders/pre_meeting_calm_haptic.png	Pre-meeting regulation scene
ezra_golden_phone/renders/evening_wind_down_amber.png	Evening wind-down scene
ezra_golden_phone/renders/walk_prompt_subtle_pulse.png	Walk prompt scene
ezra_golden_phone/renders/emotional_recovery_warmth.png	Emotional recovery scene

Shape Iterations

The checked-in shape studies document the path from simple oval and golden pebble through thinner, fuller, thumb-indexed, and athletic skip-stone variants. They are intentionally shape-only: no sensors, material detailing, glow, or mesh complexity. The recommended direction is the skip-stone family, with the Corian/KRION material, luminous mesh, PPG island, charger package, and scene lighting applied after silhouette selection.

See ezra_golden_phone/shape_iterations/README.md.

Prior Nautilus Direction

ezra_nautilus/ keeps the earlier nautilus-shell Blender direction, including the MCP addon, build script, blend source, GLB/OBJ/STL exports, and a turntable frame. It is retained as design lineage and a source of the flattened-nautilus construction logic behind the current skip-stone body.

System Architecture

Onshape Engineering Package

The Onshape package is recorded in ezra_golden_phone/ENGINEERING_MANIFEST.md and ezra_golden_phone/PROTOTYPE_BUILD_PLAN.md.

Primary document: Codex_Diagnostic_Test

Current assemblies:

Assembly	Purpose
Ezra_Product_Assembly_v1	Product-level packaging assembly
Ezra_Exploded_Technical_Assembly_v1	Exploded assembly for technical review
Ezra_Internal_Packaging_BOM_v1	BOM-driven internal packaging assembly
Ezra_BOM_Packaging_Placeholders_v1	Placeholder geometry and imported/vendor references

Part Studios called out in the manifest:

Part Studio	Purpose
Top_Shell_A	KRION/Corian top shell envelope, seam strategy, internal rib/standoff intent
Bottom_Shell_A	Underside, contact patch logic, sapphire PPG recess
Frame_Internal_Mg	Magnesium or glass-filled nylon internal chassis envelope
Battery_Main_6000	82 x 45 x 9 mm pouch-envelope target
PCB_Main_v1	Main logic board, AI SoC/NPU, PMIC clusters
Sensor_PPG_Module	Secondary sensor PCB and PPG optical alignment
Audio_System_Dual	Voice speaker chamber and directional edge speaker envelope
Light_System_Optics	COB flood MCPCB and TIR flashlight lens
Haptic_System_LRA	Actuator envelope and elastomer cradle
Thermal_Warmth_Module	Graphite spreader and palm warmth zone
Connectivity_Antenna_Zones	Perimeter antenna keepout envelope
Charging_USB_Qi_Module	Hidden Qi coil, magnet ring, USB-C strategy
Environmental_Sensors_Vents	Seam-integrated vent manifold and waterproof membrane intent

Product scene assemblies already captured for review:

Scene	Element ID	Intent
Ezra_Scene_Morning_Guidance	33a3eb97a8d03f4b2b933002	Bedside pickup, soft glow, low-recovery coaching
Ezra_Scene_PreMeeting_Calm	a2336167188af890deb331b7	Elevated pulse while held, slow haptic breathing cadence
Ezra_Scene_Evening_WindDown	262a42c2ed729bab77166748	Warm amber bedside mode, sleep-window guidance
Ezra_Scene_WalkPrompt	806f9729d9de121066534e79	Midday sedentary pattern, subtle pulse prompt
Ezra_Scene_Emotional_Recovery	2e2a42f345d9b77ae6e173cd	Post-stress regulation, gentle warmth and voice guidance

Demo Critical Path

Moment	Behavior	Hardware dependency
Hand authentication	Owner recognized from PPG pickup in roughly 4 seconds	MAX30102, TPM, enrollment model
Warm contact	Designated contact triggers warmth plus amber haptic pulse	LTE, LRA, TEC, light channel
Voice and memory	Spoken query answered from structured personal memory	CM4, mic array, speaker, LLM stack
UV sweep	Surface contamination fluoresces under UV-A	UV-A LEDs, filter, baffle
Live call	Voice command places a cellular or VoIP call	LTE, audio stack, modem software

Repository Map

.
├── README.md
├── Project Ezra.png
├── project-ezra-phone-plan.svg
├── SPEC.md
├── hardware.md
├── firmware.md
├── haptic-language.md
├── ppg-authentication.md
├── prototype-guide.md
├── studio.png
├── system-architecture.svg
├── ezra_golden_phone/
│   ├── BRIEF.md
│   ├── ENGINEERING_MANIFEST.md
│   ├── PROTOTYPE_BUILD_PLAN.md
│   ├── ezra_golden_phone.blend
│   ├── exports/
│   ├── renders/
│   └── scripts/
└── ezra_nautilus/
    ├── BRIEF.md
    ├── ezra_nautilus.blend
    ├── exports/
    ├── renders/
    └── scripts/

Status

Track	Status
Concept and specification	Complete enough for investor/prototype package
Industrial design	Active: skip-stone form, glow language, underside light platform
Blender shell model	Active and exportable
Onshape packaging	Started: product assembly, exploded assembly, part studios, BOM placeholders
Prototype BOM	Drafted with P1/P2 priorities and procurement estimates
Firmware stack	Scoped
PPG authentication	Scoped
Voice stack	Scoped
Manufacturing partner selection	Pending

Project Ezra is brought to you by The Studio, a project from Good Industries inside The Good Project. thegoodproject.net