PUNE INSTITUTE  OF COMPUTER TECHNOLOGYDHANKAWADI, PUNE- 411043

A SEMINAR ON

“RUNNING MESSAGE DISPLAY”By

1.Sagar Dayawan.2.Walke Rahul. 3.Gupta Vatsla.

GuideMr. V. B. Vaijapurkar

 DEPARTMENT OF ELECTRONICS & TELECOMMUNICATION ENGINEERING

 *2010-2011*

GROUP NO:1

BLOCK DIAGRAMPOWER SUPPLY

TIMERIC

DECADE COUNT

ER

SHIFT REGISTE

R

PICT

COUNTER

stores the number of times a particular event or process.

Types

• Asynchronous counter• Synchronous counter• Decade counter • Up–down counter • Ring counter• Johnson counter

SHIFT REGISTER

Used for data storage, data transfer and to perform certain arithmatic and logic operations .

Types• Serial-in serial-out (SISO)• Serial-in parallel-out (SIPO)• Parallel-in serial-out (PISO)• Parallel-in parallel-out (PISO)

LED

• smaller size• low current consumption• catchy colours they emit

LED DISPLAY

• Video display which uses light-emitting diodes.

• Typically used in store signs and billboards.• Commonly used in destination signs on public

transport vehicles.• used as form of lighting, general illumination

task lighting, stage lighting.

TypesFollowing are two types of LED panels1) Conventional (using discrete LEDs) - Most outdoor screens.

2) Surface-mounted device (SMD) panels - Most indoor screens.

3) Dot-matrix display -consists of a matrix of lights or mechanical

indicators arranged in a rectangular configuration.

- used to display information on machines, clocks, railway departure indicators and many

other devices.

Sizes128×16 (Two lined)128×32 (Four lined)192×64 (Eight lined)

Character Resolutions3×5(or 4x6)5×7(or 6x8)7×511×9

CONCLUSION

LED has better visibility from greater distance.

REFERENCES

"LED". http://en.wiktionary.org/wiki/LEDZheludev, N. (2007).The life and times of the

LED — a 100-year history. Nature Photonics.Arun Kumar Singh. Digital Principles

Foundation of Circuit Design and ApplicationPaul Horowitz and Winfield Hill. The Art of

Electronics.

THANK YOU