Sometimes we need a non-contact liquid level sensor. There are several ways to build that, but the easiest is to try an optical liquid level sensor. You may already have an idea in mind since you are ...

Modern industrial systems have a multitude of sensors, switches, buttons and other low-frequency inputs that need continual monitoring. The network of input devices that an industrial system (such as ...

They do so by sending a small current through their probe tip. Current flowing between the sensor and some reference (often the metal tank holding the liquid) is compared inside the sensor to current ...

Smart switches are very useful in the smart home. They give you the best of both worlds: you can automate your lights, but you can also control them manually when you need to. Smart switches aren't ...