IOT-enabled fuzzy logic assistive eyewear for visually impaired using ultrasonic detection and 555-timer electronics

This study takes a close look at a new kind of assistive eyewear, built specifically for people with visual impairments, and powered by Internet of Things (IoT) tech. The system uses an ultrasonic sensor to spot obstacles, a fuzzy logic controller to make sense of the data, and a 555 timer to manage alerts. It’s all about helping users move around on their own, safely and confidently, by giving them real-time feedback on what’s in their way. How it works: The ultrasonic sensor checks how far away obstacles are. The fuzzy logic controller takes these readings and sorts them into four clear categories 'very close,' 'close,' 'medium,' or 'far.' Based on those, the 555 timer (set up in a stable mode) sends out signals at different frequencies to a buzzer. So, if something’s close, the buzzer sounds more frequently; if it’s far, the buzzing slows down. This way, users get immediate, easy-to-understand audio cues about their surroundings. What sets this design apart is that it sticks with analog and discrete logic components, skipping microcontrollers completely. That choice makes the system simpler, cheaper to run, and easier to maintain. When put to the test, the eyewear reliably spotted obstacles between 2 and 400 centimeters, responded quickly, and cut down on annoying false alarms compared to older versions.