Is optical drive an input device?
CD and DVD drives are also input devices, since they read data into the computer. Another classification of a peripheral is an output device. A CD or DVD burner would also be an I/O device, since it can both read and write data to discs.
Is an optical pen an input or output device?
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer’s cathode-ray tube (CRT) display.
What is optical input devices?
scanner, also called optical scanner, computer input device that uses a light beam to scan codes, text, or graphic images directly into a computer or computer system. Bar-code scanners are used widely at point-of-sale terminals in retail stores.
Is printer an input device?
This includes items such as the monitor (or screen), keyboard and mouse. An input device is any device that allows you to enter data into a computer and interact with it. Common input devices include keyboards, computer mice, touchpads and touchscreens. Printers are another common type of output device.
What are the basic principles of optical input devices?
For this, it uses a beam of light that is reflected on the paper with marks, to capture presence and absence of marks. The optical mark reader detects the presence of mark by measuring the reflected light. The pattern of marks is interpreted and stored in the computer.
What are types of input devices?
Computer – Input Devices
- Joy Stick.
- Light pen.
- Track Ball.
- Graphic Tablet.
What is input and output?
An input device is something you connect to a computer that sends information into the computer. An output device is something you connect to a computer that has information sent to it.
What are the types of input devices?
Is the optical cartridge a digital or analog device?
First, to make this clear from the start, an optical cartridge is a completely analog device. There is nothing digital about it. Like mm’s and mc’s, it reads the information stored in record grooves by means of the mechanical vibrations of a stylus.
Which is an example of an optical input device?
Scanner is an example of optical input device. Other common optical input devices are magnetic ink character reader used for Magnetic Ink Character Recognition (MICR), optical mark reader used for Optical Mark Recognition (OMR), optical character reader for Optical Character Recognition (OCR) and Barcode Reader.
Which is better optical cartridge or MM / MC cartridge?
The optical cartridge has about 40 mV output, which is about 10 to 100 times higher than MM / MC cartridges, so high output can be obtained from an extremely low mass system. This is an advantage over MM / MC systems which require a very low voltage to pass through the tonearm wires, becoming vulnerable to interference and signal loss.
How does an optical cartridge read a groove?
Both the MM / MC cartridge and the optical cartridge read the record groove through the needle, but the usual MM / MC cartridge detects the music signal by vibrating the magnet (or coil) in the magnetic field. On the other hand, optical cartridges detect music signals by capturing shadow changes (brightness changes) using LEDs and PD (photo cells).