Transcript Software
Ryan Gittens, Jason Sweeney, Sean Kolanowski Advisor: Dr. Bhanja EEL 4906 Professional Issues and Engineering Design Introduction The goal of our design project is to create the most user friendly and cost effective surge protection/home automation system on the market today. It will not only feature surge protection but also individual outlet switching, power monitoring and encrypted Wi-Fi connectivity. These features would allow one to control connected devices securely from any smart phone or browser connected to the internet, and ultimately cut their energy consumption. • This would be done through voltage and current sensing circuits that relay data to a microcontroller unit using analog signals. The microcontroller would then transmit this information to a web server which could be read off of a smart phone. The connected user could also control and program individual outlets, and receive updates and alerts through a hybrid web application. • The product will be designed to offer quick and effortless installation, a sleek, user- friendly interface, reliable surge protection, and accurate power monitoring at an affordable price. A combination that has yet to be realized. Design Approach Wi-Fi Shield 120 Volt Plug Surge Protection Control Relays Line-Select Transistors 120 Volt Outlets Voltage and Current Sensing Circuit ATmega328p Microcontroller Active Outlet LEDs Design Approach • Software • Pspice for circuit simulation. • CadSoft EAGLE for PCB design. • SolidWorks or Inventor for 3D model design. • Useful Equations • V=IR • Kirchoff’s Laws • With an OP-Amp: • Noninverting input voltage = inverting input voltage • Virtually no current travels into either input • Voltage Divider: Vout = Vin(R2/(R1 + R2)) Action Items Hardware: • Design, Simulate and Test the current and voltage sensing circuits. • Prototype the designed circuits on a breadboard. • Integrate relays to allow switching using the microcontroller. • Formulate a way to monitor and transmit each of the four outlet’s energy readings to the microcontroller using minimal components. • Optimize the circuitry using improved techniques and components to achieve minimal power consumption and size. Software: • Develop the algorithms that take the data and convert it into useful information. • Connect the microcontroller to the internet, set up web server and test Wi-Fi communication. • Design the web application to allow switching and programming of the individual outlets. • Design PCB for final circuit design with the packaging in mind. • Design packaging for circuitry using 3D design software. • Work on the web application to improve the user interface and user experience. TIMELINE PROJECT PLANNING 12 Months Nov Oct Dec Jan Feb Mar AC-DC PSU and Sensing Circuit Design Outlet Control Circuit Design Surge Protection Circuit Design PCB Design Procure the necessary components for physical testing of the circuit Begin initial design of our project's website layout Maintain/Update all wiring diagrams, Browser – Arduino Transmission Set-Up Server and Website Set-Up Web Application Development Prototyping Jason Sweeney Confirm Local Functionality Confirm Remote Functionality Package Design Sean Kolanowski Ryan Gittens Group Market Risk Similar products that are definite competitors include: • Efergy Ego Smart Power Socket & App • Supports monitoring and switching of one plug • $59.99 • Beklin WEMO • Supports switching and programming of one outlet • $69.95 • Both lack multiple outlets and surge protection. However, these large companies may decide to add those features and we may not be able to compete. Because of this we are looking for more ways to add functionality through the software. Summary • With the smart power strip, one would be able to switch multiple devices on and of from anywhere and can be sure that their devices are protected against surges. • In addition, the set up will be effortless and no technical skill would be required to use it.