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BEACON FLASHER USING MICROCONTROLLER AND PWM FED MOSFET

BEACON FLASHER USING MICROCONTROLLER AND PWM FED MOSFET. SUBMITTED BY EDGEFX TEAM. ABSTRACT. A low voltage lamp of 12V is driven by a power MOSFET in PWM mode drive which is derived from a microcontroller The duty cycle of the PWM increases progressively and decreases in certain time interval

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BEACON FLASHER USING MICROCONTROLLER AND PWM FED MOSFET

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  1. BEACON FLASHER USING MICROCONTROLLER AND PWM FED MOSFET SUBMITTED BY EDGEFX TEAM

  2. ABSTRACT • A low voltage lamp of 12V is driven by a power MOSFET in PWM mode drive which is derived from a microcontroller • The duty cycle of the PWM increases progressively and decreases in certain time interval • microcontroller is engaged to provide flashing lamp simulating a beacon light

  3. BLOCK DIAGRAM

  4. HARD WARE EQUIPMENTS • POWER SUPPLY BLOCK • MICROCONTROLLER (AT89S52/AT89C51) • LED • PWM • MOSFET • BC547 • 1N4007 • RESISTORS & CAPACITORS

  5. EMBEDDED SYSTEMS Definition for :- EMBEDDED SYSTEMS • A combination of hardware and software which together form a component of a larger machine. • An example of an embedded system is a microprocessor that controls an automobile engine. • An embedded system is designed to run on its own without human intervention, and may be required to respond to events in real time.

  6. EMBEDDED SYSTEMS

  7. MICRO CONTROLLER AT89S52 • Compatible with MCS®-51 Products • 8K Bytes of In-System Programmable (ISP) Flash Memory • 4.0V to 5.5V Operating Range • Crystal Frequency 11.0592MHZ • Three-level Program Memory Lock • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel • Watchdog Timer

  8. PIN DIAGRAM OF AT89S52

  9. PWM • The PWM switching frequency has to be much faster than what would affect the load, which is to say the device that uses the power. • The term duty cycle describes the proportion of on time to the regular interval or period of time; • a low duty cycle corresponds to low power, because the power is off for most of the time. Duty cycle is expressed in percent, 100% being fully on.

  10. PWM APPLICATIONS • Telecommunications • Power delivery • Voltage regulation • Audio effects and amplification.

  11. MOSFET Metal–Oxide–Semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) MOSFET is a device used for amplifying or switching electronic Signals

  12. MOSFET as a switch & P- Type , N-Type MOSFET

  13. BC547 • The BC547 transistor is an NPN Epitaxial Silicon Transistor. • The BC547 transistor is a general-purpose transistor in small plastic packages. • It is used in general-purpose switching and amplification BC847/BC547 series 45 V, 100 mA NPN general-purpose transistors. • Whenever base is high, then current starts flowing through base and emitter and after that only current will pass from collector to emitter

  14. BIBILOGRAPHY • The 8051 Microcontroller and Embedded systems” by Muhammad Ali Mazidi and Janice Gillispie Mazidi , Pearson Education. • ATMEL 89S52 Data Sheets. • www.atmel.com • www.beyondlogic.org • www.wikipedia.org • www.howstuffworks.com • www.alldatasheets.com

  15. THANK ‘Q’

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