Extending Life Of Lamps Using Zero Voltage Switching

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Extending life of lamp
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The project is designed to prevent failure of incandescent lamps during cold conditions when it draws high current when switched on. This is because they have very low resistance and due to random switching makes the load at peak supply voltage. This project aims at increasing lamps life by using a TRIAC that controls the switch on time by illuminating it after detecting the zero cross point of supplied voltage waveform. This causes current waveform rising from zero when switched on to full value, thus increases life of lamp. A push button is used to switch on the lamp at zero voltage of supply voltage and this draws the current from zero to full value slowly. A comparator is utilized for ZVS (Zero Voltage Switching) output. This ZVS is provided to microcontroller (of 8051 family) as a reference interrupt.

Hardware Specifications

  • 8051 series Microcontroller
  • Load
  • Voltage Regulator
  • Opto-Isolators
  • LED
  • Push Button
  • Transformer
  • Diodes
  • Crystal

Software Specifications

  • Keil µVision IDE
  • MC Programming Language: Embedded C