The system uses an IR sensor to detect each coconut husk. Whenever a coconut husk interrupts the infrared beam, the sensor sends a signal to the Arduino UNO. The Arduino processes the signal, ...

Build a tiny ESP32 OLED keychain with a 1.3-inch display and custom 3D-printed enclosure. Wire the ESP32 S3 and program it ...

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 ...

Multifunctional structural metals capable of monitoring their internal mechanical state are increasingly important. Here multilayer strain sensing architectures are embedded directly within Ti-6Al-4V ...

Emerging air quality sensors – with general traits of being more compact, directly reading pollutants, and lower in cost than traditional methods - have a wide appeal to professional researchers, ...

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 ...

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EPA has established air sensor loan programs independently and through collaborations with libraries, tribes, museums, and others to enable the public to learn about air quality in their communities.

Towels that don’t dry, a basement with a lingering musty smell, air that feels heavy no matter what temperature you set your smart thermostat to—if any of this sounds familiar, it may be time to ...

An interactive, real-time 3D simulation of an IoT-based Smart Irrigation System using an ESP32 microcontroller, WebGL (Three.js), and vanilla JavaScript. Interactive 3D smart farm scene with soil bed, ...