This project is a proximity alarm system that uses an ultrasonic sensor to measure distance and warns the user through LEDs and a buzzer — just like a parking sensor on a car. As an object gets closer ...

Continuous glucose monitors have become popular among people who have diabetes and those who need to track their glucose levels. These devices are painless and can easily sync up to an app on your ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...

Sensors and Diagnostics is a gold open-access journal publishing innovative and high-impact research on sensing technologies and diagnostic systems. The journal focuses on studies that explore novel ...

All [Hannah Robertson]’s Birduino needs is for one to tap an NFC-enabled card to the reader, and the device plays one of the vocalizations associated with the bird shown on the card. It ties together ...

An organic mixed ionic–electronic photosensor is developed that converts changes in illumination into transient current spikes and uses ion-mediated inhibition to program their amplitude. This ...

Low-cost air pollution monitors use one or more sensors and other components to detect, monitor and report on specific air pollutants like particulate matter (PM) or carbon dioxide and/or ...

#define G_led 8 // choose the pin for the Green Led #define R_led 9 // choose the pin for the Red Led pinMode(echo, INPUT );// declare ultrasonic sensor Echo pin as input pinMode(trigger, OUTPUT); // ...

This document outlines the procedure for extracting nonvolatile and semi volatile organic compounds from solids such as soils, sludges, and wastes. Method 3550C: Ultrasonic Extraction, part of Test ...