A reflective strip is placed on the motor shaft. Each time the strip passes the IR sensor → pulse generated. Arduino counts pulses for 1 second → converts to RPM.

You can create a release to package software, along with release notes and links to binary files, for other people to use. Learn more about releases in our docs.

Abstract: Emission checking is essential to reducing air pollution in urban areas. Conventional systems, such as Pollution Under Control (PUC) registration in India, rely on manual inspections without ...

Abstract: People who stay out of their homes for long hours do not get time to water plants. Due to the increasing pollution, the plants might wilt sooner than expected if ignored for a longer period.

Article subjects are automatically applied from the ACS Subject Taxonomy and describe the scientific concepts and themes of the article. An emerging field of research focusing on marine-based carbon ...

The best Windows Hello webcams add something your PC may lack: a quick, secure way to log in to your PC without a password. Wouldn’t it be nice if your PC just recognized you instead? That’s where a ...

George Orwell might’ve predicted the surveillance state, but it’s still surprising how many entities took 1984 as a how-to manual instead of a cautionary tale. [Benn Jordan] decided to take a closer ...

© 2025 American Chemical Society and Division of Chemical Education, Inc. Article Views are the COUNTER-compliant sum of full text article downloads since November ...

The best smart locks make it easy to keep your home safe and secure. Along with giving you access to a digital keypad (negating the need to carry around a physical key), many of them let you check ...