The plug-and-play style of smart home devices is convenient but expensive. ESPHome is monumental in helping you save costs and build your own smart devices to pair with Home Assistant. All you need is ...

This is a simple arduino project for a soil moisture sensor that will light up a LED at a certain moisture level. It uses Arduino Duemilanove microcontroller board. Two wires placed in the soil pot ...

[HankDavis] sent along this link to a video showing a tutorial on how to make touch sensors using a “darlington pair”. In the video we are taken through the idea and how we’re going to construct it.

Over the past three years, the Raspberry Pi has proved that a credit card-sized microcomputer can routinely surprise users with its sneaky power and capabilities. Of course, the only problem is that a ...

[Dustin Andrews] built this add-on board which works as a proximity sensor. He wanted a standalone sensor for his Arduino projects which would use a single pin as a trigger. This lets him alert the ...

Now in its sixth year, the Cornell project team CU GeoData bridges engineering and earth sciences to design and deploy environmental sensors, including a sensor network across the Finger Lakes and a ...

Tired of condensation wrecking your shed tools or greenhouse gear? I built a no-frills ESP32 + DHT22 node that wakes every 15 minutes, grabs temp/humidity data, beams it over Wi-Fi, and sleeps—running ...

Want more? Subscribe to our newsletter to get our investigations delivered straight to your inbox. Journalists, scientists and technologists gathered at San Diego State University on Saturday for ...