e.g. - "communication: RFID" Search tips
Hi Guest
Find Projects
>
$229
$183
10 in Stock
Discount 20%
Buy
$209
$167
10 in Stock
Discount 20%
Buy
$49
$39
10 in Stock
Discount 20%
Buy
$183

Do it Yourself kit

For Students

$229
10 in Stock
20%  OFF
$167

Readymade kit

For Students

$209
10 in Stock
20%  OFF
$39

Project kit

For Institution

$49
10 in Stock
20%  OFF
PROJECT DESCRIPTION

The main objective of this project is to control the AC power to load by using the firing angle control of thyristors for switching the loads by alternating voltages applied to the load.

The proposed system uses a microcontroller of 8051 and a rectified power supply. In this system, the op-amp is used as a comparator for finding zero crossing pulses of the voltage. Here the lamp is controlled by the back-to-back thyristors in place of an induction motor, which is connected to the microcontroller with the help of an opto-isolator. The isolator is used for isolating the loads from the microcontroller. A push button is interfaced to the microcontroller to control the motor at different speeds.

In this system, the zero-crossing point of the waveform is detected by a comparator whose output is then fed to the microcontroller. Then, it provides the required delayed triggering control to a pair of SCRs through an opto-isolator interface in between the controller and SCRs. Finally, the power is applied to the load through the SCRs. The push-button switch is interfaced with the controller for increasing or decreasing the AC power to the load. The induction motor is replaced by a lamp whose varying intensity illustrates the reduced power to the motor. The variation in the speed of the motor depends on the reduced power.

The project in future can be enhanced by implementing a wireless system to reduce the main power. So, it can be operated manually by any user with wireless system in an easy way.

 

×

The main objective of this project is to control the AC power to load by using the firing angle control of thyristors for switching the loads by alternating voltages applied to the load.

The proposed system uses a microcontroller of 8051 and a rectified power supply. In this system, the op-amp is used as a comparator for finding zero crossing pulses of the voltage. Here the lamp is controlled by the back-to-back thyristors in place of an induction motor, which is connected to the microcontroller with the help of an opto-isolator. The isolator is used for isolating the loads from the microcontroller. A push button is interfaced to the microcontroller to control the motor at different speeds.

In this system, the zero-crossing point of the waveform is detected by a comparator whose output is then fed to the microcontroller. Then, it provides the required delayed triggering control to a pair of SCRs through an opto-isolator interface in between the controller and SCRs. Finally, the power is applied to the load through the SCRs. The push-button switch is interfaced with the controller for increasing or decreasing the AC power to the load. The induction motor is replaced by a lamp whose varying intensity illustrates the reduced power to the motor. The variation in the speed of the motor depends on the reduced power.

The project in future can be enhanced by implementing a wireless system to reduce the main power. So, it can be operated manually by any user with wireless system in an easy way.

 

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
  • 8051 series Microcontroller
  • LM358
  • Opto isolators
  • SCRs
  • Push Button
  • Transformer
  • Diodes
  • Voltage Regulator
  • Resistors
  • Capacitors
  • Crystal
  • Lamp
×
  • 8051 series Microcontroller
  • LM358
  • Opto isolators
  • SCRs
  • Push Button
  • Transformer
  • Diodes
  • Voltage Regulator
  • Resistors
  • Capacitors
  • Crystal
  • Lamp
Software Requirements
  • Keil Complier
  • Languages: Embedded C or Assembly
×
  • Keil Complier
  • Languages: Embedded C or Assembly
Q & A
Q:  Which microcontroller is used in this project?
A:  A 40 pin 8051 microcontroller is used in this project.
Q:  What is thyristor AC power control?
A:  By using push button provided, we can control the power to the load. This can also be done with Bluetooth see model no 325. Follow the link: http://www.edgefxkits.in/remote-ac-power-control-by-android-application-with-lcd-display
Q:  Can I place motor instead of lamp?
A:  Yes motor with rating, up to ¼HP 230V AC, can be placed instead on lamp.
Q:  How is the bulb intensity varied?
A:  The bulb intensity can be varied by delaying the firing angle of Thyristor, so as to control its triggering.
READ WHAT OTHERS HAVE SAID
×
Be the first person to review this project
WRITE A REVIEW
Name
Email
Location
Feedback
Please enter security code
Value
Quality
Rating Breakdown (0 Reviews)
0
0
0
0
0
SIGN UP FOR NEWSLETTER



Edgefx Technologies,
1001 Bayhill Drive, 2nd Floor,San Bruno,
CA - 94066, United States of America.
© 2012 Edgefx Technologies Pvt Ltd. All Rights Reserved