Soft edges. Quiet details.
Rounded 12 mm plan corners, a softened crown, recessed branding and replaceable feet. The four closure screws move underneath, leaving the top uninterrupted.
THE PROGRAMMABLE TRACKER · MECHANICAL H / PCB G
Know where.
Understand why.
Make it act.
Location, motion and field signals. One compact platform you can inspect, program and make your own.
OPEN ENGINEERING
Engineering prototype. Interactive demonstrations, real design artifacts. Physical qualification pending.
INTERACTIVE CADLoading geometry…
Every layer, revealed.132 × 90 × 33.6 mm · Mechanical H
Select a component in the model to inspect its source.
4G + GNSSLocation & connectivity
6-axis IMUMotion with context
9–24 V + 1SExternal & battery power
2 DI / 2 AI / 2 DOConnect to the real world
NEW / MECHANICAL H
Considered outside.
Serviceable inside.
A soft stone upper shell meets a graphite base. Hidden underside fasteners, a single restrained status light and replaceable cable entries give the tracker a coherent product identity.
Give every cable a home.
Separate flexible entry inserts, internal tie anchors, recessed USB access and an optional screw-on mounting plate. The antenna bulkheads remain accessible.
Open it. Keep it.
The upper shell lifts away. The PCB stays on its original mounts; the protected battery has its own saddles and removable insulating straps.
FRESH MECHANICAL EVIDENCE
Loading native CAD checks…
Solid intersections, battery growth, shell registration, USB insertion and lid-removal paths. Harness H1 adds compatible wire diameters, separated battery routes and controlled bend geometry. These checks do not establish drop resistance, sealing, thermal or RF performance.
Build, assemble and test the complete product ↗
Mechanical H is a design-validation revision using unchanged Rev G electronics. It is not the mechanical package currently submitted to JLCPCB. Mold-tool approval and physical qualification remain open; no ingress rating is claimed.
01 / INSIDE THE PLATFORM
Small board.
A complete system.
Follow the signal from sensor to software. Choose a subsystem to inspect its components, operating limits and design intent.
Inspect the complete component register Search by reference, part or subsystem
| Reference | Part | Subsystem | Value |
|---|
Design register includes test contacts and DNP references. The assembly package contains 169 fitted placements / 70 BOM lines.
02 / BEHAVIORAL DIGITAL TWIN
Your inputs.
Its next move.
SYNTHETIC DEMO · NO DEVICE CONNECTED
Change a signal. Lose the network. Pull the power. Watch admission, output protection and telemetry react.
FIELD PLAYBACK / ILLUSTRATIVE ROUTE
RADIOQualifying
OUTPUT 1 / 2OFF / OFF
QUEUED0
ACKNOWLEDGED0
Waiting for admission
The browser twin is a behavioral model. Native replay executes the actual C++ protection headers against this session.
SIGNAL EXPLORER / MOTION + WIRING
See what the
sensors would see.
Rotate a virtual sensor frame to explore gravity projections, then inspect each harness cavity. Orientation is illustrative; the real firmware uses acceleration magnitude and angular speed for motion detection.
LSM6DS3TR-CARZEN / IMUX → Y ↑ Z ⊙
Static rotation alone keeps acceleration magnitude near 1 g. This does not estimate position or prove IMU accuracy.
HARNESS CONNECTOR EXPLORER
Open complete wire drawing ↗Cavity labels come from the Rev G wire list. This diagram is logical, not a mating-face orientation drawing. Confirm connector keying before wiring.
03 / POWER & THERMAL WORKBENCH
Find the edge.
Understand the margin.
Explore how assumed rail impedance, converter efficiency and transmit duty affect the design. These are uncalibrated engineering bounds, not measured performance.
Rail under 2 A load3.40 V minimum
Modem converter TjLumped steady-state estimate
Battery peak currentConstant-power low-current root
MODELED RAIL TRANSIENT470 µF · passive RC sensitivity
0.1 → 2 A pulse, 100 ms duration. Fixed effective source resistance; no switching-loop model.
MODELED THERMAL APPROACH0–600 s · assumed 2 J/°C
Equations, assumptions & what this cannot prove
Battery: I = 2P / (V + √(V² − 4RP)); SYS = V − IR. Rail: Vmin = Vdc,min − Ipeak × Reffective. Thermal: T(t) = Tamb + Ploss × θ × (1 − e−t/(θC)).
Rev G envelope: 2 A peaks ≤100 ms, ≤20% duty; effective rail resistance ≤0.15 Ω. Efficiencies, hot resistance and thermal parameters require measurements. The 3.5 A switch-current reference applies at the datasheet test point, not a guaranteed hot/low-voltage limit. No FEA, stability, EMI or battery electrochemistry result is implied.
Runs the repository’s Python model on the demo server.
04 / TEST, DON'T ASSUME
Evidence you
can interrogate.
The Rev G baseline below predates Mechanical H. Historical engineering checks, freshly executed host tests and physical acceptance are different kinds of evidence. They stay separate here.
23Digital checks passed
Reviewed baseline · 21 Oct 2026
Reviewed baseline · 21 Oct 2026
3Bounded model observations
Not hardware passes
Not hardware passes
30Open gates in the 21 Oct baseline
Current handoff has 33 criteria
Current handoff has 33 criteria
Choose a test suite to generate fresh results. No physical device is actuated.
Reviewed engineering baseline
What still needs a real board and calibrated instruments?
- LTE burst droop, startup/overshoot, supply transitions and converter stability.
- Charging, pack identification, NTC tolerance and enclosed thermal behavior.
- USB compliance, field-I/O fault behavior, ESD and EMC.
- GNSS sensitivity, antennas and Indian operator coverage for the exact modem SKU.
- Housing fit, harness pull/bend, drop, vibration, moisture and material qualification.
- Fixture probe force, contact resistance, alignment, board bending and repeatability.
Supplier DFM and assembly alignment findings remain unresolved in the captured Rev G evidence. No commercial release is claimed.
05 / YOUR APPLICATION, YOUR LOGIC
From signals
to something useful.
The ESP32-S3 exposes a small application boundary. Read a snapshot, return desired outputs, and keep protection in control.
firmware/src/application.cpp ILLUSTRATIVE CUSTOM LOGIC
Outputs application(const Snapshot& s) { // true sinks current to ground. // Protection can veto these requests. return { s.din1 && s.ain1 > 6.0f, s.moving }; }
The actual default firmware returns both outputs OFF. Demo rules do not flash or modify a device.
OPTIONAL / READ-ONLY SERIALBring a real device
Bring a real device
when it's ready.
Connect a browser-supported serial device emitting newline-delimited JSON. Incoming records are shown verbatim as device data, separately from the synthetic twin. No commands or firmware are sent.
No physical tracker connected.
Waiting for a user-selected serial device at 115200 baud.Chrome/Edge desktop with Web Serial, on localhost or HTTPS. A compatible device and JSON-emitting firmware are required. Device readings are not calibrated acceptance results.
SENSORS + I/O→SNAPSHOT→YOUR LOGIC→PROTECTION→OUTPUTS + TELEMETRY
BUILT TO BE UNDERSTOOD
Explore it.
Challenge it.
Make it yours.
Back to the live lab ↗Rev G engineering demonstrator · India deployment target · Protected installations