A: If the signal is analogue then an ADC analogue to converter is required. The output will be in a digital form and that can be decoded and displayed as readout using LEDS or any other visual media
bitmap
Text adapter
scanner
Signal processing and linear systems by B.P LATHI
A scanner is a device that takes a picture or image of a physical document or object and converts it into a digital format that can be stored or manipulated on a computer. Scanners are commonly used to create digital copies of paper documents or photographs for easy storage or sharing.
an image scanner(scanner) is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. A printer is a peripheral which produces a text and/or graphics of documents stored in electronic form, usually on physical print media such as paper or transparencies.
A keyboard is the most commonly used tool for entering text into digital devices.
A scanner takes an input which is printed materials (pictures, text) and converts it to an electronic format that can be edited.
A printer is a device that produces soft copies of digital documents by transferring text and images from a computer onto paper.
An image scanner optically scans images, printed text or handwriting and converts it to a digital image. It was invented by Ray Kurzweil.
Pearson ETM is XML-encoded text. It "converts" the presentation formatting of print publishing to the content formatting used when re-purposing that text. Thus the structure and content of the text are maintained, but the specifics of presentation are stripped away, allowing device-specific formatting and display of the content. In this way, text that originally appeared printed onto paper can be presented on the web, via CDs, or however else.
Scanner