STORAGE AND DISPLAY DEVICES - RMD
Transcript of STORAGE AND DISPLAY DEVICES - RMD
![Page 1: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/1.jpg)
UNIT IV
STORAGE AND DISPLAY
DEVICES
U.NAGABALAN ., AP / EEE
M.VENKATESWARAN., AP / EEE
R.VANITHA., AP / EEE
RMD ENGINEERING COLLEGE
![Page 2: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/2.jpg)
TOPICS
• MAGNETIC DISK AND TAPE – RECORDERS
• DIGITAL PLOTTERS
• PRINTERS
• CRT DISPLAY
• DIGITAL CRO
• LED
• LCD
• DOT MATRIX DISPLAY
• DATA LOGGERS
2
![Page 3: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/3.jpg)
RECORDERS
•A recorder is a measuring instrument which records time varying quantity, even
after the quantity or variable to be measured has stopped.
•The electrical quantities such as voltage & current are measured directly.
•The non- electrical quantities are recorded using indirect methods.
•The non- electrical quantities are first converted to their equivalent voltages or
currents, using various transducers.
![Page 4: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/4.jpg)
Electronic recorders may be classified as:
1.Analog recorders
2.Digital recorders
Analog recorders dealing with analog systems can be classified as
•Graphic recorders
•Oscillographic recorders
•Magnetic Tape recorders
Digital recorders dealing with digital output can be classified as
•Incremental digital recorders
•Synchronous digital recorders
![Page 5: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/5.jpg)
MAGNETIC TAPE RECORDER
Basic Components of Tape Recorder
1.Recording Head
2.Magnetic Tape
3.Reproducing Head
4.Tape Transport Mechanism
5.Conditioning Devices
![Page 6: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/6.jpg)
MAGNETIC TAPE RECORDER
![Page 7: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/7.jpg)
TAPE TRANSPORT MECHANISM
![Page 8: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/8.jpg)
PRINTERSIMPACT PRINTERS press formed character faces against an inked ribbon onto the paper.
▪ line printer
▪ dot matrix printer.
NON IMPACT PRINTER and plotters use laser techniques, inkjet sprays, xerographic processes, electrostatic methods and e1ectrothermal methods to get images onto the paper.
• A ink-jet printer
• laser printer
![Page 9: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/9.jpg)
DRUM PRINTERS
![Page 10: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/10.jpg)
DOT MATRIX PRINTERS
![Page 11: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/11.jpg)
LASER PRINTER
![Page 12: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/12.jpg)
DIGITAL PLOTTERS
![Page 13: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/13.jpg)
CRT DISPLAY
![Page 14: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/14.jpg)
DIGITAL CRO
![Page 15: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/15.jpg)
What is an LED?
• Light-emitting diode
• Semiconductor
• Has polarity
![Page 16: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/16.jpg)
![Page 17: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/17.jpg)
![Page 18: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/18.jpg)
LED: How It Works
• When current flows across a diode
• Negative electrons move one way and positive holes move the other way
![Page 19: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/19.jpg)
LED: How It Works
• The wholes exist at a lower energy level than the free electrons
• Therefore when a free electrons falls it losses energy
![Page 20: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/20.jpg)
LED: How It Works
• This energy is emitted in a form of a photon, which causes light
• The color of the light is determined by the fall of the electron and hence energy level of the photon
![Page 21: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/21.jpg)
Inside a Light Emitting Diode
1. Transparent Plastic Case
2. Terminal Pins
3. Diode
![Page 22: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/22.jpg)
Kinds of LEDs
![Page 23: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/23.jpg)
How to Connect a LED:
• Requires 1.5~2.5V and 10 mA
• To prevent overloading, use resistor 470 Ω
![Page 24: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/24.jpg)
https://www.elprocus.com/light-emitting-diode-led-working-application/
![Page 25: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/25.jpg)
LIQUID CRYSTAL DISPLAY (LCD)
![Page 26: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/26.jpg)
![Page 27: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/27.jpg)
![Page 28: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/28.jpg)
![Page 29: STORAGE AND DISPLAY DEVICES - RMD](https://reader030.fdocuments.us/reader030/viewer/2022020620/61e5af8ef7b171273c08ca06/html5/thumbnails/29.jpg)