Adding sensors to your Arduino opens up a whole new world of exciting projects. Here are some of the best sensors around.

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 ...

The hardware is consists of an Arduino microcontroller (here an Arduino Uno R3) and a pre-wired soil moisture sensor module. The soil moisture sensor module , built around the LM393 comparator, gives ...

[Stephen]’s system uses commercially available sensors that track pH levels and Oxidation-Reduction Potential (ORP), both basic measurements that indicate water quality.

To manage their fields effectively, farmers need precise information about nutrients, pH levels, and other key soil parameters. Soil composition varies not only across different areas but also at ...

The impetus for the Know Labs research on pH levels derives from the Company’s historic focus on medical diagnostics with an emphasis on its proof-of-concept work on blood glucose monitoring.

Measuring the pH of substances gives us vital clues about the world around us, such as identifying contaminated water or checking the toxicity of medical or cosmetic products.

The sensor is based on an STM32 microcontroller, in this case one specifically optimized for low-power applications. The other low-power key to this build is the small seven-segment e-ink display.

Smart sensing technology to help farmers use fertilizer more effectively and reduce environmental damage has been created by bioengineers.

Or pH level? I think the pH level is 7. I didn’t use any fertilizer after planting, but applied some Iron-Tone a few days ago, with no results. — Maggie Li, Chicago A.