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MICROCONTROLLER BASED LAMP LIFE EXTENDER BY ZVS USING THYRISTOR

MICROCONTROLLER BASED LAMP LIFE EXTENDER BY ZVS USING THYRISTOR. SUBMITTED BY EDGEFX TEAM. ABSTRACT. Incandescent lamps exhibit very low resistance in cold condition Thus at the time of switching from cold state it draws very high current. Thus many lamps fail at the time of switch ON.

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MICROCONTROLLER BASED LAMP LIFE EXTENDER BY ZVS USING THYRISTOR

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  1. MICROCONTROLLER BASED LAMP LIFE EXTENDER BY ZVS USING THYRISTOR SUBMITTED BY EDGEFX TEAM

  2. ABSTRACT • Incandescent lamps exhibit very low resistance in cold condition • Thus at the time of switching from cold state it draws very high current. Thus many lamps fail at the time of switch ON. • Engaging two SCR’s in anti parallel or a TRIAC the switching ON time can be precisely controlled by firing after detecting the zero cross point

  3. BLOCK DIAGRAM

  4. HARD WARE EQUIPMENTS • POWER SUPPLY BLOCK • MICROCONTROLLER (AT89S52/AT89C51) • OPTO-ISOLATOR • ZVS • OPAMP LM358 • TRIAC • LED • RESISTORS & CAPACITORS • 1N4007, 1N4148 • LOAD

  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. TRIAC

  10. MOC3021 ( OPTO COUPLER ) • Opto-couplers are made up of a LED and a light sensitive device, all wrapped up in one package • no electrical connection between the two devices • The light sensitive device may be a photodiode, phototransistor, or more esoteric devices such as thyristors, triacs etc.

  11. ZVS • Zero voltage cross detection means the supply voltage waveforms pass through zero for every 10msec. that means as we are using 50Hz ac signal the total cycle is 20ms.in that for every half cycle (i.e. 10ms) we will get zero signals • ZVS detection we are getting zero voltage pulses. We are applying these pulses to microcontroller • microcontroller gets these pulses then only the microcontroller is irrupted and it will perform the required/assigned operation.

  12. ZVS WAVE FORM

  13. LM 358 ( COMPARATOR ) • Internally frequency compensated for unity gain. • Large dc voltage gain: 100 Db. • Wide bandwidth (unity gain): 1 MHz (temperature compensated) • Wide power supply range: • Single supply: 3V to 32V • or dual supplies: ±1.5V to ±16V • Very low supply current drain (500 µA)-essentially independent of supply voltage. • Low input offset voltage: 2 mV • Input common-mode voltage range includes ground. • Differential input voltage range equal to the power supply voltage.

  14. LM 358 PIN DIAGRAM • 1 - Output 1 • 2 - Inverting input • 3 - Non-inverting input • 4 – VCC- • 5 - Non-inverting input 2 • 6 - Inverting input 2 • 7 - Output 2 • 8 – VCC+

  15. LED LEDs are semiconductor devices are made out of silicon When current passes through the LED, it emits photons as a byproduct. Normal light bulbs produce light by heating a metal filament until its white hot LEDs present many advantages over traditional light sources including lower energy consumption, longer lifetime, improved robustness, smaller size and faster switching

  16. SOFTWARE REQUIREMENTS PROGRAMMING LANGUAGES Embedded C , ALP (Assembly Language) COMPILERS: Keil 2.0/3.0uv DUMPING SOFT WARE: Using Micro controller flash Software we are dumping our HEX Code into Micro Controller

  17. KEIL COMPILER WINDOW

  18. 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

  19. THANK ‘Q’

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