An Arduino compatible board (e.g. Arduino UNO): Arduino UNO / Arduino Mega A HC-SR04 ultrasonic sensor / A Ping))) ultrasonic sensor: HC-SR04 (Optional - For aqqurate distance values) A DHT ...

Simple ultrasonic antispy voice recording jammer based on ATTINY13 / ATTINY85 / ATTINY45 / ATTINY25 with audio amplifier PAM8403 / TPA3116D2 module driving piezo ultrasonic transducers and AD9833 ...

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Three straightforward projects show how simple woodworking can lead to stylish creations. Each build proves that getting started is easier than expected.

Turn your kitchen into a mini science lab with these five easy and safe experiments for kids. From bubbling volcanoes to dancing raisins and stretchy slime, each activity uses everyday items to spark ...

To save the lives of infants and small kids in lower resource countries, there are a handful of tools: anti-malarial drugs, bed nets and vaccines. A massive experiment in rural Kenya suggests another.

Carmen Willmore (University of Idaho Extension Educator, Bingham County) says her office is kind of a liaison between the 4-H program and the Eastern Idaho State Fair. “My office helps ...

Getting beyond answers like 'fine' and 'nothing': Five simple ways to spark real talk with kids by Shelbie Witte, The Conversation edited by Lisa Lock, reviewed by Andrew Zinin Editors' notes ...