This project uses an HC-SR04 ultrasonic sensor to measure how close an object is. A buzzer and LED react depending on the distance, similar to a car parking sensor. < 10 cm → buzzer and LED stay on.

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Abstract: This letter presents a real-time bed-exit alarm system using ultrasonic sensors, infrared (IR) sensors, and an accelerometer. The ultrasonic sensors detect the elderly in bed; the IR sensors ...

As a thank you to loyal members, the National Trust has a 25 per cent concession for senior members aged 60 or over who have been members for at least three consecutive years. Save £24 or more ...

Abstract: Ultrasonic guided wave detection technology is one of the most effective damage identification methods in structural health monitoring (SHM), but external factors will cause errors during ...

Meta is opening its AI-powered smart glasses to third-party developers, announcing a new ‘Wearables Device Access Toolkit’ that will allow mobile apps to tap into the devices’ cameras, microphones, ...