Psi Compass

The Psi Compass is a handheld or HelmKit-mounted field instrument that gives the operator a directional reading toward sources of Psi Field coherence anomaly — engineering-honestly, a multi-sensor anomalous-field bearing finder; doctrinally, a compass for psionic phenomena. It is the simplest deployable Psi-Tech sensor and is often the first piece of real instrumentation a Tho'ra recruit handles.

Overview

The Compass shows the operator three things:

• A bearing arrow to the strongest detected anomalous field within range.
• A confidence ring (color-graded) reflecting signal-to-noise.
• A class indicator (geological / electromagnetic / psionic / unknown) reflecting the Psionic Threat Model classifier's best guess.

It is a finder, not a confirmer. A Psi Compass tells you something is over there; the Psi Recorder and the Resonant Finder tell you what.

Theoretical Basis

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Epistemic status: [[ Category:Provisional Psi Claims|PROVISIONAL]] Theory anchors: Geomagnetic Sensitivity in Humans

Anomalous magnetic and electrostatic gradients are real, locally detectable, and have operational value (USGS uses similar instruments).

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Epistemic status: [[ Category:Testable Psi Claims|TESTABLE]] Theory anchors: Resonant Neurobiology

A subset of these anomalies correlates with reported subjective experiences in trained operators; a blinded field study can resolve this.

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Epistemic status: [[ Category:Speculative Psi Claims|SPECULATIVE]] Theory anchors: Psi Field, Ley Lines Geophysical Hypothesis

Some anomalies are Psi Field gradients; the Compass is then a true psi compass. The instrument remains useful at the base layer regardless.

Subsystems and BOM

Mk0 (target ≤ \$30)

Drilled-out lensatic compass shell + a backlit dial + a printed legend mapping cardinal directions to Psionic Threat Model classes. Functions as ritual practice and visible-brand carrier.

Mk1 (target ≤ \$120)

• Adafruit Feather nRF52840 — \$25
• HMC5883L ×2 (gradiometer config) — \$16
• Electrostatic probe (op-amp + plate) — \$5
• 0.96" OLED — \$5
• 18650 + TP4056 — \$10
• Bone-conduction click for haptic-bearing feedback — \$10
• Enclosure (3D print + brass inserts) — \$20

Algorithm: gradiometer rejects uniform background field; bearing computed from the gradient vector; class label from a small on-device classifier trained on labeled walks.

Mk2 / Mk3

Mk2: tri-axial fluxgate ($\sim$\$150 unit), GPS, on-device map overlay. Mk3: integrated with the HelmKit HUD and the Resonant Finder live tile feed.

Build Notes

• Gradiometer beats magnetometer. Two HMC5883L on a 100 mm baseline cancels uniform earth field and surfaces local anomaly. Cheap; effective.
• Calibrate on a known-null site. Establish baseline at a low-anomaly location before deployment.
• Walk the grid. Bearing readings are only meaningful when stitched over a short walk (10–30 m). The Mk1 firmware integrates over a 30-step window by default.
• Honesty about class. The class indicator must show "unknown" when below confidence threshold; do not let it default to "psionic".

Safety and Ethics

• No emitter. The Compass is sensor-only.
• No personal data captured. Walks are anonymous gradient logs.
• Operators briefed that "anomaly" ≠ "danger" ≠ "psi"; the Compass surfaces signal, the human decides meaning.

Maturity (Mk0 → Mk3)

See Tho'ra Tech Maturity Levels for the convention.

Mark	Phase	Status	Confidence	Evidence Base	Next Validation Gate
Mk0	Cosplay-type	Complete	100% (symbolic)	Ritual + build practice	User satisfaction
Mk1	Prototype	Active	—	—	—
Mk2	Test-type	Planned	—	—	—
Mk3	Production	Projected	—	—	—

Failure Modes and Mitigations

• False bearing from passing vehicle. → Gradiometer rejects most uniform fields; firmware drops bearings during high-IMU-motion windows.
• Classifier overconfidence. → Default class is "unknown"; confidence ring must show below threshold.
• Magnetic calibration drift. → Forced recalibration on power-up at known-null site.
• Operator over-interpretation. → Briefing emphasises "signal, not meaning".
• Battery exhaustion mid-walk. → Low-battery warning at 20 %; auto-save current walk at 5 %.

See Also

• Psi-Tech
• Psi Recorder
• Resonant Finder
• Psionic Threat Model
• Geomagnetic Sensitivity in Humans
• HelmKit
• Tho'ra Tech Maturity Levels