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PROJECT DESCRIPTION

The main objective of this project is to control the AC power by using the firing-angle control of the thyristors for switching the loads for ac voltages applied to the load. It also displays given voltages on the LCD display.

The proposed system uses a microcontroller of the 8051 family, and a rectifier power supply. This system uses op-amp as a comparator for finding zero crossing pulses of the voltage. In this system, a lamp is controlled by the TRIAC which is connected to the microcontroller with an opto-isolator. The isolator is used for isolating the loads from the microcontroller. A 16*2 LCD display interfaced to the microcontroller displays the information.

The AC power is controlled by varying the trigger pulses from the microcontroller as per the program. The microcontroller receives the percentage of trigger from the matrix keypad and delivers the desired output to the switch TRIAC for controlling the electrical loads.

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The main objective of this project is to control the AC power by using the firing-angle control of the thyristors for switching the loads for ac voltages applied to the load. It also displays given voltages on the LCD display.

The proposed system uses a microcontroller of the 8051 family, and a rectifier power supply. This system uses op-amp as a comparator for finding zero crossing pulses of the voltage. In this system, a lamp is controlled by the TRIAC which is connected to the microcontroller with an opto-isolator. The isolator is used for isolating the loads from the microcontroller. A 16*2 LCD display interfaced to the microcontroller displays the information.

The AC power is controlled by varying the trigger pulses from the microcontroller as per the program. The microcontroller receives the percentage of trigger from the matrix keypad and delivers the desired output to the switch TRIAC for controlling the electrical loads.

PROJECT HIGHLIGHTS
Load Switch @ Zero Voltage.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
×
Load Switch @ Zero Voltage.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
BLOCK DIAGRAM
Hardware Requirements
  • Microcontroller (AT89C52/S52)
  • TRIAC
  • LCD
  • Transformer
  • Regulator
  • Capacitors
  • Resistors
  • Diodes
  • Keypad
  • Opto Isolator
  • Lamp.
×
  • Microcontroller (AT89C52/S52)
  • TRIAC
  • LCD
  • Transformer
  • Regulator
  • Capacitors
  • Resistors
  • Diodes
  • Keypad
  • Opto Isolator
  • Lamp.
Software Requirements
  • Kiel compiler
  • Languages: Embedded C Or Assembly
×
  • Kiel compiler
  • Languages: Embedded C Or Assembly
Q & A
Q:  Which microcontroller is used in this project?
A:  A 40 pin microcontroller from 8051 family is used in this project
Q:  What is Programmable power control?
A:  It implies controlling the lamp power by entering the desired percentage of intensity through a numeric keypad.
Q:  Can I place motor instead of lamp?
A:  Yes up to ¼HP, 230V AC motor can be placed.
Q:  How the bulb intensity can be varied?
A:  Bulb intensity can be varied by varying the firing angle of the thyristor to control its triggering.
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