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Introduction There are different sensors and methods for determining water depth, leakage, whether a container is empty or overflowing, and rain detection. One of the easiest and cheapest methods is to use a water level detection sensor that we will discuss in this tutorial.There are some other common names for this sensor: rain sensor, water level sensor, humidity sensor, and water leakage sensor. What you will learn Operating principles of a water level sensor and how to test itInterfacing th...

Overview In this article, We want to make a cool gadget that can make a safe zone for your devices to be unlocked. At the end of this project you: Will learn how to use a fingerprint sensor. Will learn how to pair your devices with your safe zone gadget. Will make a cool gadget called Safe Zone. Lock & Unlock Devices These days, Our usage of Smart devices is improved and we have many different data in devices like chat content, contacts, images, notes and ...