Engineering, Third Eye Worldwide
Two generations. The first was born at a blind support centre and tested at TEKNOFEST in 2022: four small microcontrollers, ultrasonic sensors, and a text message home. The second is being built now: a language of vibration on the skin, driven by lasers, radar, and sonar. An assist frame for the legs is planned after the tests and is not part of this build. Everything is published here, the parts, the schematics, the safety file, and the milestones each piece has to pass.
Real now. The second generation design: its blueprint, its KiCad schematic and its printed part files, published below.
In development. The second generation hardware is being built and tested now, and is nearing MVP. Anything not yet measured on the bench is marked as a design value.
How it works
Follow one doorframe through the whole kit: the light that finds it, the frame that carries it, the arithmetic that chooses a motor, the buzz that rises on the skin, and the step that clears it. Played to the modeled latency budget, then at real speed. Nothing here is a video; the numbers drive the drawing.
Forward laser grid, 4 by 4 at 60 Hz
World
the hazard
sensor frame, 25 ms
The pod's forward laser grid gathers one 4 by 4 frame at 60 Hz. Light leaves, hits the doorframe 0.6 m ahead at the right edge of the field, and comes back.
The modeled budget, true proportions
0 of about 70 ms, modeled
Each stage holds on the stage long enough to be watched; the strip keeps the true proportions of the model, and the buzz and the sweep run at real speed. Every number is read from the same latency model and zone catalog the rest of this site uses, so this drawing cannot drift from the pages around it. The figure carries all 20 first-build motors from the catalog.
From the real files
The belt hub schematic is a KiCad file in the repository, exported by kicad-cli, with an electrical rules check that returns zero at its default severities. The enclosures are OpenSCAD parts rendered by Blender: the belt pod, the motor pod, and the chest cradle. Nothing here is generated by a model; every dimension is a design value until a printed part is measured.
One A2 sheet. On the left, the sensor modules: the forward and ground VL53L8CX laser grids on the sensor I2C bus, each LPn on its own GPIO, the RD-03D radar on its own UART at 256000 baud on the 5 V rail, and the two JSN-SR04T sonars with their trigger lines and their ECHO lines divided down to 3.3 V logic. In the center, the RP2350 with every used pin labeled, its two I2C buses kept separate so a stuck actuator write can never delay a sensor read. A dashed isolation boundary runs to its right with one wire crossing it: the Reflex's TX into the ESP32-S3 Spine's RX, and nothing back. On the right, the belt multiplexer and the eight driver and motor pairs of the belt segment, each motor on a two pin connector, each driver pair on a four pin connector. At the bottom left, the battery, the inline fuse, the charger, and the USB-C jack. The electrical rules check returns zero at its default severities.
The KiCad source and the OpenSCAD parts open with the licence; the record provides no separate text netlist, so none is published yet.
The older drawings from the dossier and the first bench sketches are kept in the research archive.
Version 1, the first generation
In use since 2022
Version 2, the second generation
In build
The build, from the record: architecture, sensors, parts, milestones
The assist frame, planned after the milestones
Planned
Announcement
The second generation drops the Jetson Orin Nano. The wearer's own smartphone, on a chest mount with its camera, carries the compute and the AI, and talks to the kit's Spine over Bluetooth; the Spine sits behind the one way link from the Reflex, so the phone can never write into the warning path. The microcontrollers, the drivers, and the little motors stay exactly where they are, in a loop that never waits on the phone.
The camera is the wearer's choice: the phone's own camera on the chest, a separate chest camera, or none at all. The warning bands work the same in every case.
The engineering record
The record in docs/ is the constitution of the second generation. If a fact is not in it, it is measured on the bench, or it stays off this site. Each file is rendered whole on its own page, with a figure drawn from its numbers.
The timeline
The dated record. It began at a blind support centre before 2022 with Said Mohaddes Sadeqi, was tested at TEKNOFEST 2022, was brought into use with blind and visually impaired people at that centre the same year, and was published whole. Every dated entry links to its source.
BEFORE 2022, INTO USE IN 2022
Said Mohaddes Sadeqi builds the first Third Eye Kit at the blind support centre where he was after losing his sight: ultrasonic ranging at the glasses and the shoes, warnings by sound and vibration, and a 2G text home to family with the wearer's location. He brings it to his school and enters TEKNOFEST 2022, Black Sea, in the Barrier-Free Living category under the team name ABRT01: finalist, and Best Presentation.
SEPTEMBER 2022
Anadolu Agency reports on a student's third eye project for blind people. Faktor, in Bosnia and Herzegovina, also reports on the founder and the device he built.
2022 AND AFTER
Two hardware revisions, demonstrated with blind and visually impaired people at the centre, whose feedback set the alert distances, feedback types, and fit. The first generation repository's ledger says what was and was not tried: near range alerts with blind users; crowds, traffic, and safety certification not.
OCTOBER 2025
The teww.org domain is registered on 14 October 2025 (public registry record; a date from outside the engineering record). The site carries the first-generation write-up and the second-generation spec.
JULY 2026
The first-generation repository is created on GitHub on 4 July 2026: spec, firmware, pinouts, bill of materials. The second-generation repository follows on 5 July 2026 (repository dates, from outside the engineering record): the dossier, the safety file, the four schematics. MIT for the code, CC BY 4.0 for the documents.
NOW
The reference spec is frozen and the parts are on the bench. The brain tier moves from the Jetson to the wearer's own phone, on a chest mount, integrated with the microcontrollers across the isolation boundary. Bench drawings for the belt, the collar strip, and the ankle bands, the parts list, the placement study, and this engineering record. Firmware and assembly are the current work; the assist frame is planned after the tests.
Where this goes
The goal is the natural move: walking without bracing, then running, given back to blind and low-vision people. The tests measure it, walking speed and the percentage of preferred walking speed against a mobility aid only baseline, and running is not claimed until the test plan requires and verify it.
The first build: a belt, a collar strip, and two ankle bands, six signals, a city block crossed by feel. Built for blind and visually impaired people; until the replacement test passes, keep traveling the way you travel now.
The architecture was built for speed. About 70 milliseconds from the world to your skin for what is ahead, modeled until the bench measures it: at 3 meters per second that is 21 centimeters of travel, which is acceptable, while the ground grid at 15 Hz sees a step edge only every 20 centimeters, which is tight. Running is not claimed until the test plan requires and verify it.
The wearer's own phone, on a chest mount with its camera, takes the work the dossier gave a Linux computer, at a fraction of the cost and weight (docs/07). The location text home that the first kit sent over a 2G modem rides in the phone: no modem, no SIM, no airtime to pay for, and nothing leaves the phone by default.
Our founder, Said Mohaddes Sadeqi, talks about skateboards. We are not sure yet, and we say so. We are sure we will find out, in the open, with the people this is for.
On the roadmap
A small handle you hold like a flashlight and point ahead. It is an add-on to the kit, not part of it, and the belt keeps warning with or without it.
Sense. Point it at the space in front of you and the grip vibrates, stronger as something gets closer. Click it and your phone, or the glasses when they come, tells you what it is: a door, a bench, a person waiting.
Guide. Say what you are looking for, like "elevator button." The grip pulls your hand the way a friend would guide it, up or down in short pulses, left or right in a steady lean, and a clear double tap when you are there.
Research on vibration guidance for the hand gives us a place to start, and blind testers will tell us whether it works. Nothing here is built yet. When it is, it goes through its own testing milestone, published on the test plan like everything else.
Watch
How the kit works inside: the sensors, the reflex controller, the motor drivers and the motors, and how one obstacle travels from the world to the skin.
Video not here yet. This full length video is being added to the site. Nothing plays here until the real recording is in place.
A guided walk through the front end view, step by step.
Video not here yet. This full length video is being added to the site. Nothing plays here until the real recording is in place.
Read
The dossier and the safety file are the founder's own words, Said Mohaddes Sadeqi's, rendered on this site. The studies are the program's.
How we work
Physics before AI
Distance comes from lasers, radar, and sound. The AI reads signs and names things. It never steers.
Honest limits
Status is stated plainly. Every page says what was measured and what was not.
Staged milestones
Bench, controlled course, real routes, daily life, readiness review. Trial participants wear it from G1 under IRB, with an orientation and mobility specialist present and a trailing sighted guard; general use waits for G4, and assist frame work is considered only at the readiness review.
Open source
Both generations live in public repositories. The firmware, the schematics, and the studies are on this site to read and to download.