This document describes a propeller LED display system using an AT89S52 microcontroller. It consists of an IR sensor, DC motor, motor driver circuit, LEDs, and other components. The system works on the principle of persistence of vision, where the eye retains images flashed at 25 Hz, appearing as continuous motion. The microcontroller controls the motor speed and LED patterns to produce a propeller-like visual effect. The document also provides details about the hardware components and microcontroller architecture.
Field Effect Transistor, JFET, Metal Oxide Semiconductor Field Effect Transistor, Depletion MOSFET, Enhancement MoSFET, Construction, Basic operation, Regions of Operation, Drain Characteristics, Transfer Characteristics, Biasing, Non-Ideal Characteristics of E-MOSFET, DC Analysis, AC equivalent circuit and Parameters, E-MOSFET as an Amplifier, AC analysis, MOSFET as a Switch, MOSFET as a diode, MOSFET as a resistor, High frequency equivalent circuit, Miller Capacitance, Frequency Response, NMOS and CMOS inverter
PN junction diode –structure, operation and V-I characteristics, diffusion and transient capacitance - Rectifiers – Half Wave and Full Wave Rectifier,– Display devices- LED, Laser diodes- Zener diodecharacteristics-Zener Reverse characteristics – Zener as regulator,TRANSISTORS, BJT, JFET, MOSFET- structure, operation, characteristics and Biasing UJT, Thyristor and IGBT Structure and characteristics,BJT small signal model – Analysis of CE, CB, CC amplifiers- Gain and frequency response –
MOSFET small signal model– Analysis of CS and Source follower – Gain and frequency response- High frequency analysis,BIMOS cascade amplifier, Differential amplifier – Common mode and Difference mode analysis – FET input stages – Single tuned amplifiers – Gain and frequency response – Neutralization methods, power amplifiers –Types (Qualitative analysis),Advantages of negative feedback – voltage / current, series , Shunt feedback –positive feedback – Condition for oscillations, phase shift – Wien bridge, Hartley, Colpitts and Crystal oscillators.
Linear Integrated Circuits -LIC, Based On Anna University. From Basics to the Graduated Degree's. BE Based On. With Reference Of Two Text Books.
Visit insmartworld.blogspot.in if ur a geek & interested in new tech's.
Field Effect Transistor, JFET, Metal Oxide Semiconductor Field Effect Transistor, Depletion MOSFET, Enhancement MoSFET, Construction, Basic operation, Regions of Operation, Drain Characteristics, Transfer Characteristics, Biasing, Non-Ideal Characteristics of E-MOSFET, DC Analysis, AC equivalent circuit and Parameters, E-MOSFET as an Amplifier, AC analysis, MOSFET as a Switch, MOSFET as a diode, MOSFET as a resistor, High frequency equivalent circuit, Miller Capacitance, Frequency Response, NMOS and CMOS inverter
PN junction diode –structure, operation and V-I characteristics, diffusion and transient capacitance - Rectifiers – Half Wave and Full Wave Rectifier,– Display devices- LED, Laser diodes- Zener diodecharacteristics-Zener Reverse characteristics – Zener as regulator,TRANSISTORS, BJT, JFET, MOSFET- structure, operation, characteristics and Biasing UJT, Thyristor and IGBT Structure and characteristics,BJT small signal model – Analysis of CE, CB, CC amplifiers- Gain and frequency response –
MOSFET small signal model– Analysis of CS and Source follower – Gain and frequency response- High frequency analysis,BIMOS cascade amplifier, Differential amplifier – Common mode and Difference mode analysis – FET input stages – Single tuned amplifiers – Gain and frequency response – Neutralization methods, power amplifiers –Types (Qualitative analysis),Advantages of negative feedback – voltage / current, series , Shunt feedback –positive feedback – Condition for oscillations, phase shift – Wien bridge, Hartley, Colpitts and Crystal oscillators.
Linear Integrated Circuits -LIC, Based On Anna University. From Basics to the Graduated Degree's. BE Based On. With Reference Of Two Text Books.
Visit insmartworld.blogspot.in if ur a geek & interested in new tech's.
Comparator holds a dominant place in fast ADC circuit for the conversion of analog to digital signal. In this modernized digital world every utilization circuits requires an ADC’s with low power to consumption. This in turn reflects in the design of comparators during the design process of the fast ADC circuits, scope is due to the higher number of comparator usage. As the technologies are scaling down, the number of transistor per unit area increases, so that the sub threshold leakage current increases which leads to power consumption in any circuit. This sources the project idea to design a comparator. It is presumed during the design that, it consumes low power in its double tail configuration which when replaces an inverter circuit in latch stage of the double tail comparator by a sleepy inverter. This presumption is validated through the analysis of the simulation results. The power consumption of the designed proposed double tail comparator is 30μw when compared to 35 μw in the conventional type. 2-bit flash ADC circuit is designed and analyzed under two different configurations of the double tail comparator. From the results, it is clear that the power consumption of the ADC circuit designed with proposed sleepy inverter based double tail comparator is observed to be 45mw.
Comparator holds a dominant place in fast ADC circuit for the conversion of analog to digital signal. In this modernized digital world every utilization circuits requires an ADC’s with low power to consumption. This in turn reflects in the design of comparators during the design process of the fast ADC circuits, scope is due to the higher number of comparator usage. As the technologies are scaling down, the number of transistor per unit area increases, so that the sub threshold leakage current increases which leads to power consumption in any circuit. This sources the project idea to design a comparator. It is presumed during the design that, it consumes low power in its double tail configuration which when replaces an inverter circuit in latch stage of the double tail comparator by a sleepy inverter. This presumption is validated through the analysis of the simulation results. The power consumption of the designed proposed double tail comparator is 30μw when compared to 35 μw in the conventional type. 2-bit flash ADC circuit is designed and analyzed under two different configurations of the double tail comparator. From the results, it is clear that the power consumption of the ADC circuit designed with proposed sleepy inverter based double tail comparator is observed to be 45mw.
Temperature Based Fan Controller can be used for reducing the power consumption & also to assist people who are disabled and are unable to control the speed of fan.It may also be used for monitoring changes in environment.
Design of LED Driver Power Based on LNK417EGIOSRJEEE
In recent years, people have been committed to the development and the design of new lighting sources. The life of LED lamps depends on the life of the LED driver which has a great relationship with the life of the electrolytic capacitor. In this paper the advantages of the drive power of the electrolytic capacitor are analyzed and the design of the PFC circuit and the transformer is described in details. On the basis of the LNK417 driver chip, a novel single-stage flyback drive circuit without the electrolytic capacitor is designed, which combines the power factor correction technology and constant current control to avoid the use of large electrolytic capacitors. The design and implementation of the control circuit are given and the overall performance is tested and analyzed in the article. The test results show that the driver is of high efficiency, high PF and long life etc. The efficiency is up to 85% and the PF value is not less than 0.9.
6. Introduction
What is Propeller LED Display???
Propeller is a term generally associated
with rotating fan , revolving at high RPM.
Just like a propeller, this is a special kind of
a rotating display.
How it works???
PERSISTANCE OF VISION
This is a phenomenon of the eye by which
an afterimage is thought to persist for
approximately 1/25th of a second. So if
someone is observing images at rate of 25
images/second, they appear to be
continuous.
Confused???
8. System Requirement
A. Hardware Used:
1. Microcontroller AT89S52
2. IR Pair (IR LED AND
PHOTO DIODE )
3. Voltage Regulator
4. DC Motor
5. Motor Driver Circuit
9. MCROCONTROLLER
AT89S52
The AT89S52 is a low-power, high-performance
CMOS 8-bit microcontroller with 8K bytes of in-system
programmable Flash memory. The
device is manufactured using Atmel’s high-density
nonvolatile memory technology and is
compatible with the industry- standard 80C51
instruction set and pin OUT before it can be
programmed again. This led to introduce FLASH
and NV-RAM versions of 8051.
10. The micro-controller generic part number
actually includes a whole family of
microcontrollers that have numbers
ranging from 8031 to 8751 and are
available in N-channel Metal Oxide Silicon
(NMOS) and CMOS construction. 89c52 is
an 8-bit micro-controller having 40 pins
arranged as DIP packages. The features
unique to micro-controllers include:
11. INTERNAL RAM AND ROM
I/O PO RTS WITH PROGRAMMABLE PINS
TIMERS AND COUNTERS
SERIAL DATA COMMUNICATION
The 89C52 architecture consists of these specific features:
Eight-bit CPU with registers A and B
16-bit program counter and data pointer
8-bit stack pointer
Internal ROM of 8k
Internal RAM of 128 bytes
Four register banks each containing eight registers
16 bytes addressable at the bit level
80 bytes of general purpose data memory
32 input/output pins arranged as four 8 bit ports
Three 16-bit timer/counter
Full duplex serial data receiver/transmitter
Control registers: TCON, TMOD, SCON, PCON, IP and IE
Two external and three internal interrupt sources
Oscillator and clock circuits
12. )
As its name implies it is a diode, which emits light when
forward biased. Charge carrier recombination takes place
when electrons from the N-side cross the junction and
recombine with the holes on the P side. Electrons are in the
higher conduction band on the N side whereas holes are in
the lower valence band on the P side. During recombination,
some of the energy is given up in the form of heat and light. In
the case of semiconductor materials like Gallium arsenide
(GaAs), Gallium phoshide (Gap) and Gallium arsenide
phoshide (GaAsP) a greater percentage of energy is released
during recombination and is given out in the form of light. LED
emits no light when junction is reverse biased.
13.
Definition: -
The transformer is a static electro-magnetic device that
transforms one alternating voltage (current) into another
voltage (current). However, power remains the some during
the transformation. Transformers play a major role in the
transmission and distribution of ac power.
Principle: -
Transformer works on the principle of mutual induction. A
transformer consists of laminated magnetic core forming the
magnetic frame. Primary and secondary coils are wound upon
the two cores of the magnetic frame, linked by the common
magnetic flux. When an alternating voltage is applied across
the primary coil, a current flows in the primary coil producing
magnetic flux in the transformer core. This flux induces
voltage in secondary coil.
14. A photodiode is a type of photo detector
capable of converting light into
either current or voltage, depending upon
the mode of operation. The common,
traditional solar cell used to generate
electric solar power is a large area
photodiode.
15. :
1. Keil u-Vision: To Write the microcontroller program.
The C programming language is a general-purpose
programming language that provides code efficiency, elements
of structured programming, and a rich set of operators. C is
not a big language and is not designed for any one particular
area of application. Its generality combined with its absence of
restrictions, makes C a convenient and effective programming
solution for a wide variety of software tasks. Many applications
can be solved more easily and efficiently with C than with
other more specialized language
16. The Cx51 Optimizing C Compiler is a complete implementation of the
American National Standards Institute (ANSI) standard for the C language .
Cx51 The Compiler provides you with the flexibility of programming in C and
the code efficiency and speed of assembly language . 2.PRO51
Programmer Software: To load the program in microcontroller.
3. PCB Artist: To design the PCB of the project.
