Extended research on the design and development of a smart nitrate sensor for monitoring nitrate concentration in surface and groundwater are reported in this paper. The developed portable sensing ...

A compact and simple double F-P interference optical fiber optic gas pressure sensor based on suspended core structure is proposed and demonstrated. The sensor is formed by splicing a Section of ...

Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Kevin (KTOWN) Townsend for ...

Build a device that will check whether your door is locked, using a Raspberry PI, a hall effect sensor and a small but strong (preferably neodymium) magnet. It will store the results in a cloud ...