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PROPELLER DISPLAY OF MESSAGE BY VIRTUAL LEDS

PROPELLER DISPLAY OF MESSAGE BY VIRTUAL LEDS. Submitted By:. ABSTRACT. This project comprises of circular display of a string of LEDs. Using a high speed motor and some mechanical assembly, LED string mounted on a printed circuit board.

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PROPELLER DISPLAY OF MESSAGE BY VIRTUAL LEDS

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  1. PROPELLER DISPLAY OF MESSAGE BY VIRTUAL LEDS Submitted By:

  2. ABSTRACT • This project comprises of circular display of a string of LEDs. • Using a high speed motor and some mechanical assembly, LED string mounted on a printed circuit board. • This displays some message and or a clock timing taking advantage of persistence of vision of human eye.

  3. BLOCK DIAGRAM

  4. HARDWARE REQUIREMENTS • Microcontroller, sensors. • Resistors, Capacitors, Diodes. • Transformer, Voltage Regulator. • Transistors, LEDs. • High Speed Motor.

  5. Power supply

  6. Contd.. • The 230V AC supply is first stepped down to 12V AC using a step down transformer. • This is then converted to DC using bridge rectifier. • The AC ripples is filtered out by using a capacitor and given to the input pin of voltage regulator 7805. • At output pin of this regulator we get a constant 5V DC which is used for MC and other ICs in this project.

  7. Microcontroller • It is a smaller computer • Has on-chip RAM, ROM, I/O ports... CPU RAM ROM A single chip Serial COM Port I/O Port Microcontroller Timer

  8. Block diagram of mc External interrupts On-chip ROM for program code Timer/Counter Interrupt Control Timer 1 On-chip RAM Counter Inputs Timer 0 CPU Serial Port Bus Control 4 I/O Ports OSC P0 P1 P2 P3 TxD RxD Address/Data

  9. Features of MC • 8K Bytes of In-System Programmable (ISP) Flash Memory • 4.0V to 5.5V Operating Range • Fully Static Operation: 0 Hz to 33 MHz • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel

  10. Pin description

  11. Power on Reset circuit +5V + 10 uF 31 EA/VPP X1 30 pF 19 11.0592 MHz 8.2 K X2 18 30 pF RST 9

  12. BOB BLICK'S PROPELLER CLOCK PROJECT • Bob Blick made the clock spinning on a piece of perfboard. • The power is provided from the spinning armature of a plain DC motor. • But this Project has not got viability, Though Bob was Successful in Displaying the Numeric Digit on a propeller Display.

  13. IMAGE OF BOB BLICK’S PROPELLER DISPLAY

  14. BASIC PRINCIPLE OF THE PROJECT POV (Persistence Of Vision): • This is the phenomenon which is related to vision capability of human eye • By which an after- image is thought to persist for approximately 1/25th of a second. • So, if someone is observing the images at a rate of 25 images per second then they appear to be continuous

  15. SCHEMATIC DIAGRAM EXPLANATION • Please Refer CD

  16. …..contd • As 8051 Series Has only one set of UART (TX and RX) it is essential to use a multiplexer. • By using 4052 we can Switch the TX and RX pins of microcontroller to be connected to GSM and GPS. • The data gets Received From The Gps Module by the microcontroller and Simultaneously Transmits the same through GSm Modem

  17. Software requirements • Keil an ARM Company makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for ARM7/ARM9/Cortex-M3, XC16x/C16x/ST10, 251, and 8051 MCU families. • Compilers are programs used to convert a High Level Language to object code. Desktop compilers produce an output object code for the underlying microprocessor, but not for other microprocessors.

  18. Contd.. • i.e the programs written in one of the HLL like ‘C’ will compile the code to run on the system for a particular processor like x86 (underlying microprocessor in the computer). • For example compilers for Dos platform is different from the Compilers for Unix platform  So if one wants to define a compiler then compiler is a program that translates source code into object code.

  19. schematic • Please Refer CD

  20. Working of project • Please Refer CD

  21. Applications Applications can find their way into cost effective solutions for • large public displays, information systems. • It can directly replace Railway station information displays, bus stands and many more places. 

  22. Future scope • Can be integrated With GSM Such that ANY Message from the End user with a phone can Display The text by simply Sending SMS. • It Can be Made possible to Display the clock RTC on the Display.

  23. Conclusion

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