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.

If you’ve got an existing smart home rig, motion sensors can be a useful addition to your setup. You can use them for all ...

To arm the system, all you need to do is turn on your automation under the Settings > Automations and scenes menu via the “Automations” tab. To disable it, just turn it off. To stop the alarm once ...

Top lawmakers, influential Indian American business leaders, and former U.S. diplomats on Wednesday (September 10, 2025) warned that President Donald Trump’s trade war with India and his ...

The White House later clarified the position for current visa holders but it was too late for some Rohan Mehta - not his real name - spent over $8,000 (£5,900) on flights in his scramble to get back ...

Abstract: In this letter, a high-performance graphene-based electrostatic field sensor is demonstrated. Combining the ultrahigh mobility of graphene and the long lifetime of carriers in SiO 2 /lightly ...

The ASDX sensor of Honeywell exist in many variations. Check the datasheet of your type for all the details. The I2C_ASDX library can read the sensor and give the pressure in millibar, bar or PSI or ...

Abstract: The Fire Rescue bot is designed to enhance fire detection and suppression in confined spaces. Equipped with advanced sensors, including flame intensity and temperature detectors, the bot ...

A piece of luggage prompted a major security alert at Dublin Airport yesterday afternoon. Terminal 2 was evacuated for two hours after a bag was identified as suspicious, but it was a false alarm. The ...