Biofeedback Aura Reader

Aura photography has always fascinated me — the idea that your body’s subtle electrical and thermal signals can be translated into color and light. After getting my aura read by Eileen (a genuinely transformative experience), I wanted to understand how the machine actually works. Professional aura cameras are expensive, bespoke instruments, so I built my own version from scratch using an Arduino, an industrial infrared temperature sensor, and galvanic skin response sensors worn on the index and middle fingers.

How it works

The hardware side is an Arduino R4 wired up to two sensor types: a contactless skin temperature gauge and metal conductance sensors embedded in finger sleeves that read perspiration and galvanic response. Once connected, the browser detects the device over Web Serial and the status indicator flips from error to live. You align your face inside a calibration oval on screen, hold the sensors in place, and trigger an exposure — the app reads the live biometric stream from the Arduino and maps those values to positions along an arc-shaped light field rendered on a Canvas element, loosely mirroring the energy flow geometry used in traditional aura photography.

The build

The UI is built to feel like an actual instrument — dark, sparse, with monospace sensor readouts, a pulsing live indicator, and Instrument Serif for the display type. The arc mapping takes the exposure duration, skin temp delta, and conductance variance and distributes color and luminosity across the frame, so no two readings are the same. Holding still while also clicking the mouse while also holding finger sensors is — as demonstrated — a delightful UX challenge I have not yet solved.

What this unlocks

The real insight here is that biofeedback as a creative input is wildly underexplored. The same approach — body as controller — could power: Generative portraiture that shifts in real time with a subject’s stress or calm state. Installation art where collective audience biometrics drive shared visual output. Meditative tools that give visual feedback on relaxation, making abstract physiological states legible and beautiful. This was a week-long experiment and there’s genuinely a lot more to build on top of it — the sensor pipeline works, the rendering language is just beginning.