MARINE
Lign Light – LED-Based Oxygen Indicator for Divers
HARDWARE | FIRMWARE | EMS MANUFACTURING
Project Overview
Developed a compact underwater sensor that visually alerts divers of remaining oxygen levels through distinct LED color patterns. This real-time indicator enhances underwater safety and situational awareness during deep-sea dives.
Client Requirement & Objectives
Lack of Visual Oxygen Feedback: There was no existing mechanism for divers to visually monitor oxygen levels in real time, leading to potential safety hazards during deep-sea expeditions.
Pressure-Based Oxygen Estimation: The device must incorporate a pressure sensor to continuously estimate remaining oxygen and emit corresponding LED signals.
LED-Based Alert System: The LED should blink green for >30% oxygen, orange for 10–30%, and red for <10%, providing a simple yet effective visual cue to the diver.
High Visibility & Ease of Use: The design must ensure the LED is clearly visible from a distance of at least 10–20 meters underwater, assisting not just the diver but also their team.
System Design & Build
Pressure Sensing Logic: Designed a compact circuit using high-accuracy pressure sensors calibrated for standard dive tanks.
LED Control Algorithm: Developed logic to dynamically switch between green, orange, and red blinking patterns based on tank pressure readings.
Waterproof Enclosure: Engineered a sealed, rugged casing that withstands deep-sea pressure and protects electronics from saltwater intrusion.
Visibility Optimization: Incorporated a high-intensity LED driver circuit to ensure brightness and visibility up to 20 meters underwater.
Project Tech Stack
Key Challenges & Solutions
Underwater Visibility: The biggest challenge was ensuring the LED light remained clearly visible in murky, low-light conditions. We used a specialized high-power LED and optical diffuser to enhance beam spread.
Power Efficiency: Balancing LED brightness with battery life was critical; we implemented pulse-width modulation (PWM) to conserve power without compromising visibility.
Sensor Calibration: Pressure sensors were precisely calibrated for diving conditions and tested against simulated tank environments.
Compact Integration: Fitting all components into a small, pressure-proof housing required multilayer PCB design and efficient thermal management. .
Client
Succorfish is a technology company that aims to offer precise, dependable, and cost-effective monitoring technology that can operate in the most extreme and remote locations on earth.
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