211 SRI RAMAKRISHNA MISSION VIDYALYA POLYTECHNIC COLLEGE.

  by Sri N,HARI      Lecturer / EEE

  Human Machine Interface A Human-Machine Interface (HMI) is a user interface or dashboard that connects a person to a machine, system, or device. While the term can technically be applied to any screen that allows a user to interact with a device, HMI is most commonly used in the context of an industrial process. HMIs are similar in some ways to Graphical User Interfaces (GUI) but they are not synonymous; GUIs are often leveraged within HMIs for visualization capabilities. In industrial settings, HMIs can be used to: Visually display data Track production time, trends, and tags Oversee KPIs Monitor machine inputs and outputs And more Similar to how you would interact with your air-conditioning system to check and control the temperature in your house, a plant-floor operator might use an HMI to check and control the temperature of an industrial water tank, or to see if a certain pump in the facility is currently running. Basic HMI exam...

  Electric Vehicle Basics An all-electric vehicle (EV) uses a battery to store the electrical energy that powers the motor.      EV batteries are charged by plugging the vehicle into an electric power source. They are also equipped with regenerative braking systems to capture the kinetic energy normally lost during braking and store it in the battery.      EVs are far more efficient than conventional vehicles and produce no tailpipe emissions. They also typically require less maintenance because the battery, motor, and associated electronics require little to no regular upkeep. Plus, electric vehicles experience less brake wear thanks to regenerative braking and have fewer moving parts and fluids to change relative to conventional vehicles .

                                          by,                                            T S ARUN M.E.,                                           LECTURER / EEE

  WiFi runs our life. In fact, according to a survey carried out by Direct Line by Opinium Research online, it is the number one thing that their respondents couldn’t live without.  But no matter where you are in the world, you’ve probably experienced internet connectivity problems at one point or another. Enter LiFi, a type of wireless connection that can be up to 100 times faster than WiFi. * Imagine a world where you can connect to high-speed internet by just flicking  on your light switch. * LiFi is a wireless optical networking technology that uses LEDs for  data transmission.  * In simpler terms, LiFi is considered to be a light-based WiFi that uses  light  instead of radio waves   TO  transmit information.  * Using light to transmit data allows LiFi to deliver a couple of advantages  such as working in areas susceptible to electromagnetic interference like hospitals  and aircraft cabins  and working across higher b...

                            A switch is a device which is used to make or break an electric circuit automatically or manually. In other words, an electrical switch is a controlling device, which interrupts the flow of  electric current  or changes the direction of current in a circuit. Almost all the  electrical and electronic  systems use at least one switch to control the ON and OFF operations of the device. In simple words, a switch is used to control the circuit operation by activating or deactivating the whole or certain parts or processes of a connected circuit.