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CPU Android-based MobileElectronics Laboratory (CAMEL)

Chapter 1:IntroductionBackground & RationaleTodays technological trend leads to the increasing use of portable gadgets like smartphones and tablet PCs. These gadgets have evolved through time and have a huge variety of applications. Students use smartphones in their daily lives, though rarely for educational purposes.

Background & RationaleLaboratory experiments play an important role in the students learning process. These are necessary for students to be able to apply, test, and verify the theories and principles they learn in the classroom.Background & RationaleThe lack of laboratory equipment is the main problem. A high student-to-equipment ratio would mean compromised learning. This student-to-equipment ratio is the ratio of the number of students using an equipment and the number of equipment used, the ideal of which is 1:1. Background & RationaleCurrently, there are a total of 98 Electronics Engineering students that are enrolled in CPU College of Engineering from third year to fifth year, with the third year having 36 students, fourth year having 30 students, and fifth year having 32 students. There are around 10 function generators and oscilloscopes that are available in the laboratory for students to use, though not all are fully functional. Background & RationaleThe idea of the project is to change the laboratory experience by assembling a device that would send data from a circuit to a smartphone or tablet PC via Bluetooth, and create an Android-based application that could interpret or analyze the data and use pre-programmed laboratory equipment as tools to display the desired output, thus, in a way, changing the normal laboratory experience. Students would also be able to perform experiments outside the laboratory and even in their homes.Objectives of the StudyGeneral Objectives:The main objective of the study is to design and develop CPU Android-based Mobile Electronics Laboratory (CAMEL).Objectives of the StudySpecific Objectives:To design an Android-based Mobile Laboratory system with the following components:BluetoothMicrocontroller unitAndroid smartphone or tabletSensor circuitObjectives of the StudySpecific Objectives:To create different applications for different instruments embedded in the system, specifically voltmeter, ammeter, ohmmeter, and oscilloscope.Objectives of the StudySpecific Objectives:To construct and test the system component in terms of its:FunctionalityAccuracyReliabilityPortabilityObjectives of the StudySpecific Objectives:To conduct the final test and evaluation of the system.Commercially AvailableiDVM: Worlds first iPhone, iPad and Android Enabled Wireless DMMProductsFunctionAbsolute RangeResolutionAccuracy +/- % of reading + CountsAC Voltage, True RMS0 - 400.0 mV 0.4 - 4.00 V 4.00V - 40.0 V 40.0V - 300.0 V0.1mV 0.1mV1.0mV 10mV2% + 3 (50-500Hz)DC Voltage1.0 - 400.0 mV 0.4 - 4.00 V 4.00V - 40.0 V 40.0V - 300.0 V0.1mV 0.1mV1.0mV 10mV2% + 2 (50-500Hz)Resistance0.0 - 400 Ohms 400 - 4.0K Ohms 4.0K - 40K Ohms 40K - 400K Ohms 400K - 4M Ohms1.0 Ohm1% + 2AC Current0.1 - 400 mA .400 - 4.0 A0.05mA2.0% + 3DC Current0.1 - 400 mA .400 - 4.0 A0.05mA2.0% + 3ContinuityBeeper on 250 OhmsCommercially AvailableBluetooth MultimeterProductsItemMinMaxUnitVoltage Measurement Range-3030VDCVoltage Measurement Precision3%Current Measurement Range(Max)1ACurrent Measurement Precision3%Resistance Measurement Range101,000,000Voltage Measurement Precision5%Work Temperature045Commercially AvailableOsciPrimeProductsHardware Overview:Software Overview:2x Analogue Input @ 8bit/6MspsRange +/- 1.5 V up to +/- 16 V5 analogue gain levels5 us/Div max - 1 ms/Div min3.3 MHz - 8.0 MHz Bandwidth (gain dependant)2 individual ChannelsTrigger Falling/Rising Edge, CH1/CH216 V Max Input VoltageRun/Stop data acquisition880 mW Power Consumption30 fps renderingDesigned for 10x ProbesProcessing 400'000 samples per secondRelated StudiesUllah, M.Z., (2009). An Analysis of the Bluetooth Technology. Blekinge Institute of Technology, School of Computing.Related StudiesPolitarhos, E., (2004). Wireless Communication & Applications of BlueTooth, based on MicrocontrollersRelated StudiesConnor, C., (2012).What makes a good lab in Engineering Education. Rensselaer Polytechnic Institute.SummaryThe most commonly used laboratory equipment are the oscilloscope and the multimeter, comprised of a voltmeter, an ammeter, and an ohmmeter. This led the researchers to develop CAMEL, to provide easily accessible tools not only for students but also for teachers, enthusiasts, future developers and other researchers.SummaryThe most commonly used laboratory equipment are the oscilloscope and the multimeter, comprised of a voltmeter, an ammeter, and an ohmmeter. This led the researchers to develop CAMEL, to provide easily accessible tools not only for students but also for teachers, enthusiasts, future developers and other researchers.SummaryThe Android OS will be used due to its practicality. Compared to other operating systems, Android has the advantage in terms of number of users. It is also an open-source operating system, making it ideal for customization. Android also offers an SDK to help the researchers simplify programming.SummaryGizduino X will be used due to its steady availability on the market. The Bluetooth module EGBT-045MS will be used because of its compatibility with the microcontroller Gizduino X. Both Gizduino X and EGBT-045MS have low costs, making them ideal for the usage of researchers.SummaryThe sensors to be used are Allegro ACS712 for sensing current, Arduino Voltage Sensor Module for sensing voltage, and Schmitt Trigger inverter (7414) for sensing frequency. The sensors to be used were chosen because of their compatibility with Gizduino X. SummaryBluetooth will be used because of its low power consumption paralleled with high speeds of data transfer, making it ideal for real-time measurements.SummarySome products are available commercially, but are sold in separate packages. The advantage of CAMEL over them is that CAMEL is a complete system that includes different tools that are usually sold individually.Design Plan Preparation

Construction ProcedureThe system will be designed based on the block diagram shown in figure 1. The components of the system will be designed and constructed individually and will be mounted on a breadboard to test each component's functionality. Construction ProcedureThe sensing circuit will be designed and constructed on a breadboard first, followed by the design and construction of the microcontroller-based interface system, along with the Bluetooth module. After the verification of functionality, the final sensing circuit will be designed on a printed circuit board (PCB).Construction ProcedureProcedure in Programming the Microcontroller-based Interface SystemThe Arduino platform will be used to program the MCU. The program will enable the MCU to read and analyze data from the sensing circuit. And, by using a Bluetooth module, the data will be sent wirelessly to the smartphone or tablet.

Construction ProcedureAndroid Application Development for user interfaceThe android application will be developed using android SDK, a complete kit for developing android applications, and by following suggested structured information needed to build an application. Construction ProcedureAndroid Application Development for user interfaceFirst, design the user interface and make it fit for android experience, the design should be sleek, simple and tailored to the android experience, focused on how users will interact with it. Second, develop, once the design is finalized, all that is needed are the tools to turn the app ideas into reality. Construction ProcedureAndroid Application Development for user interfaceAndroid's framework provides Application Programming Interface (APIs) to build apps that take full advantage of device hardware, connected accessory devices, the Internet, software features, and more. The application then should be built it to support a variety of screen sizes and densities, and tested it on the Android emulator and on real devicesTesting ProcedureSystem testing will start in the sensor circuit, output of the sensor will be checked to ensure data is gathered. Next, the MCU programming will be tested to ensure that it can receive data from the sensors and can send data through the Bluetooth module. Then, the android application and user interface will be tested to ensure that it can receive data via Bluetooth and display data accordingly.Data to be GatheredVI~VoltageCurrentFrequencyParameters to be AnalyzedResistancePeriodDuty Cycle