A Raspberry Pi home automation project enables controlling lights, sensors, and smart devices via open-source software, turning any house into a smart home.

Abstract: The use of electromagnetic waves for detection of different physical components such as distance, speed, position, range, direction, size, and others in different places such as military ...

Adjustable gain to avoid ADC saturation. Supports 120 VAC or 240 VAC (or any value below that). Manual calibration for custom adjustments. Power supply range: 3.3v - 5v ...

The SparkFun Ultrasonic Distance Sensor - TCT40 (sen-24805) a user-friendly upgrade to the popular HC-SR04 sensor, offers non-contact distance measurement from 2cm to 400cm with an accuracy of 3mm.