Can Arduino be connected to a computer?

Yes, most Arduino boards support UART and USB interfaces, so you can connect them to a computer and then use it to configure or program your board. Your computer can also become the central module of a larger system combining several Arduino boards and other electronic components, for example in a home automation system. In this example, Arduino boards are used as controls that receive data from sensors built into individual devices (e.g. a shutter control or an intelligent LED lighting system), while the entire system is controlled by a computer.