The project is designed to control AC
power to a load by using firing angle control of thyristor. Efficiency
of such power control is very high compared to any other method.
Remote operation is achieved by any smart-phone/Tablet etc., with Android OS, upon a GUI (Graphical User Interface) based touch screen operation. The project uses zero crossing point of the waveform which is detected by a comparator whose output is then fed to the microcontroller. The microcontroller provides required delayed triggering control to a pair of SCRs through opto isolator interface. Finally the power is applied to the load through the SCRs in series. This project uses a microcontroller from 8051 family which is interfaced through a Bluetooth device, which receives signal from Android application device for increasing or decreasing the AC power to the load. A lamp is used in place of an induction motor whose varying intensity demonstrates the varying power to the motor. The varying power results in variation in speed of the motor.
The project can be further enhanced by using direct 230 volt supply instead of 12 volt AC to the bridge rectifier for achieving higher voltage control for charging number of batteries in series.
Complete project information- Remote AC Power Control by Android Application with LCD Display
Remote operation is achieved by any smart-phone/Tablet etc., with Android OS, upon a GUI (Graphical User Interface) based touch screen operation. The project uses zero crossing point of the waveform which is detected by a comparator whose output is then fed to the microcontroller. The microcontroller provides required delayed triggering control to a pair of SCRs through opto isolator interface. Finally the power is applied to the load through the SCRs in series. This project uses a microcontroller from 8051 family which is interfaced through a Bluetooth device, which receives signal from Android application device for increasing or decreasing the AC power to the load. A lamp is used in place of an induction motor whose varying intensity demonstrates the varying power to the motor. The varying power results in variation in speed of the motor.
The project can be further enhanced by using direct 230 volt supply instead of 12 volt AC to the bridge rectifier for achieving higher voltage control for charging number of batteries in series.
Complete project information- Remote AC Power Control by Android Application with LCD Display
Project Description
Based on the principle of firing angle control of two thyristors connected in anti parallel is fed for the output from an embedded microcontroller circuit having LCD display. The firing angle is remotely controlled to get reduced load power in steps.
Figure 1 Remote AC Power Control by Android Application with LCD Display
Figure 2 Remote AC Power Control by Android Application with LCD Display
