Status: design stage. No MagBio-3D cage has been wound and no driver or firmware has been built;
nothing on this page has been measured. Geometry, fields, power and costs are outputs of the scripts in
cad/ (regenerate with cad/build.py) or targets. The DIY 143 mm reference-cage tutorial is
in ref_repo/.
3-Axis Chamber Inspector (parametric CAD)
Meshes are generated by cad/build.py from cad/magbio_params.py: nested
square Helmholtz pairs (Z outer, Y middle, X inner), split formers, rack and base. Copper windings and the Petri
dishes are reference solids. The section cut removes the half facing the view buttons (X: side, Y: front, Z: top), so those views look straight into it.
Design at a glance (model)
Loading
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Coil pairs
| Axis | Rank | Turns | µT/A | R (Ω) | Null (mA) |
|---|---|---|---|---|---|
| Loading assets/cad/field_summary.json … | |||||
Coil currents
Presets
Ambient field
Readouts
| Axis | I (mA) | V | P (mW) | B (µT) |
|---|
Loading the coil model …
Field map — slice through the chamber
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Field in 3D — direction arrows and field lines
Field in each dish (total field)
| Dish | Centre y (mm) | Max |B| (µT) | Mean |B| (µT) | vs 0.5 µT target |
|---|
Sampled at the same points as FIELD_UNIFORMITY.md (three layers of an 11 × 11 grid inside each dish).
Target Prices, Cost Ceilings & Bill of Materials
| Tier | Target price | Under $5k P-card by | COGS at 50 / 60 / 70 % margin |
|---|---|---|---|
| Loading assets/cad/bom_summary.json … | |||
Cost ceilings are arithmetic on the target prices, not cost estimates. No supplier quote exists and nothing has been built or sold, so no COGS, margin or revenue forecast is shown.
| BOM group | Lines | Pieces |
|---|
Master Engineering Dossier Suite (CoSE Standard)
DOSSIER 01
Investor & Commercial Vision
Executive summary, market sizing (an internal estimate built on unverified lab counts), positioning vs quote-only physics coils.
DOSSIER 02
Electromagnetic Physics & Simulation
Square Helmholtz theory, Biot–Savart model, per-dish residual field, tolerance and margin studies (model outputs).
DOSSIER 03
Electrical Driver & Feedback Spec
Composite current source per axis (OPA2192 + OPA548, decision D3), PNI RM3100 magnetometer, 100 Hz loop.
DOSSIER 04
Parametric CAD & Manufacturing
build123d pipeline and QA gates, split formers printed in PC, winding tables, brass fasteners, moulding DFM.
DOSSIER 05
Biological Validation & Petri Assays
Per-dish exposure (model), controls incl. bifilar sham, vertical-plate protocol for BRIC 60 mm dishes.
DOSSIER 06
Firmware & CoSE OS IoT Platform
FreeRTOS tasks, REST/WebSocket API, closed-loop nulling and feed-forward AC fields.
DOSSIER 07
Cost Model, BOM & Gated Roadmap
Unpriced bill of materials from the CAD, price-headroom arithmetic, dependency-ordered milestones.
DOSSIER 08
Comparative Benchmark & Moat
Architecture options and teardown vs Bartington and other commercial coil systems.
DOSSIER 09
Mechanical Packaging & Thermal
Part list, assembly sequence, squareness acceptance procedure, brass fasteners, thermal budget.
DOSSIER 10
Harnessing, Shielding & EMC
Twisted-pair routing, optional mu-metal pre-shield, planned FCC Part 15 / CE testing.
DOSSIER 11
Go-To-Market & Academic Sales
Personas, P-card pricing logic, grant-aligned selling and launch gates.
DOSSIER 12
Grant Funding & Production Plan
NASA and USDA SBIR fit, prototype-to-pilot build plan, candidate Midwest suppliers.
DOSSIER 13
Space Biology Synergy & XSeed
Combining XSeed microgravity work with MagBio-3D magnetic control.