Remote Induction Motor Control by Android Application with 7 Segment Display
Model: 329  
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DIY Kit Readymade Kit Project Kit
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PROJECT DESCRIPTION

The project is designed to control the speed of an induction motor such as fans, by using android application device. In home automation application, convenience of remotely controlling the speed of the fan is achieved.

 Remote operation is achieved by any smart-phone/Tablet etc., with Android OS, upon a GUI (Graphical User Interface) based touch screen operation. Android Mobile or any device act as a transmitter through Bluetooth, which is then received by Bluetooth receiver (at the receiver end) interfaced to a microcontroller of 8051 family.

Each time data sent by android application, as per code written is executed by the microcontroller to deliver delayed firing pulses to the thyristor through optical isolation. The power to the load connected in series with the thyristor is controlled, based on the received signal.

Also the firing angle is displayed on a 7-segment display. A lamp load shall be provided in place of a motor whose varying intensity demonstrates the varying power to the motor for speed control. A lamp is provided in place of an induction motor for demonstration purpose.

Further the project can be enhanced by adding more outputs from the microcontroller feeding relay drivers to switch ON/OFF the domestic loads together with the speed control of fan.

PROJECT HIGHLIGHTS
• Easy to use, Self-explanatory kit. • All-inclusive solution kit. • Extensive audio-visuals available. • Branding-free material. • Pre-programmed Microcontroller. • Call/mail for Tech Support from 10 am - 7 pm. • Can be Customized for Arduino, Raspberry Pi, PIC
BLOCK DIAGRAM
Remote Induction Motor Control by Android Application with 7 Segment Display
Hardware Requirements
• OP-Amp• TRIAC• Opto-isolator• Resistors• Capacitors• Diodes• LED• Transformer• Voltage Regulator• 8051 series Microcontroller• 7 Segment Display• Bluetooth Device
Software Requirements
• Keil compiler• Languages: Embedded C or Assembly• Android Application
PROJECT RESOURCES
• Project Abstract
• Seminar Presentation
Q & A
Q:  Which type of smart phone is used in this project?
A:  Any mobile phone which has Android OS is used in this project.
Q:  How can I install the Blue control App used for the project?
A:  Go to Google Play in your Android mobile search for Blue control App, select and install.
Q:  How can one connect the blue control application?
A:  Blue control application is connected to the hardware using Bluetooth connection, through a Bluetooth device. Please follow the operation procedure provided in the kit.
Q:  How much distance does Bluetooth support?
A:  50 feet distance is supported by Bluetooth
Q:  Why is only Android smart phone used?
A:  An Android smart phone provides wide number of free applications. Hence it is used.
Q:  Which microcontroller is used in this project?
A:  A 40 pin microcontroller from 8051 family is used in this project.
Q:  What is remote AC power control?
A:  Controlling the AC power supplied to the load using a GUI based Android application is remote AC power control.
Q:  Can I place motor instead of lamp?
A:  Yes up to ¼HP 230V AC motor can be used.
Q:  Which Android App is used in this project?
A:  BlueControl App is used which is freely available in Google Play store.
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
Q:  What to do when the lamp fails and what is the maximum lamp rating that can be used?
A:  If the lamp fails one can use any lamp or bulb which is used in homes up to 100W. We suggest you to go for low watt bulbs.