Most analyzing systems need some kind of digital input and output. Diolan USB-IO Interface Adapter GPIO-24 adapter provides a solution for adding digital input/output capabilities to user computer with USB port. It allows you to connect different hardware devices to your PC. Let us look on digital input and output conceptions.
In many cases, you only need to know one thing about the physical world: Whether something is true or false. In these cases, you can determine what you need to know using a digital input , or switch. Digital inputs have two states: off and on. If voltage is flowing, the circuit is on. Otherwise, the circuit is off. To make a digital circuit, you need a circuit, and a movable conductor which can either complete the circuit, or not. You should add the resistor to resist the current flow. When the switch is closed, the current will follow the path of least resistance, to the micro-controller pin, sending it a signal like you want it to do. You need the connection to ground as a reference point, and the resistor also prevents a power-to-ground short circuit.
The simplest control you can use over an electrical device is digital output . In this case, you would either turn something off, or on. Digital outputs are often used to control other electrical devices, through transistors or relays. More detail on these components will follow later in the course.
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