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.
ESP-SmartBin is a hygienic and futuristic solution for hands-free waste disposal. Using an ultrasonic sensor (HC-SR04), the system detects when your hand is near and automatically opens the bin lid ...
Abstract: This study proposes an innovative wireless power transfer (WPT) system, specifically designed to charge inertial measurement sensors embedded in microelectro-mechanical systems (MEMSs). By ...
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