Matching Items (59)

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Solar Powered Intrusion Detector

Description

The project described here is a solar powered intrusion detection system consisting of three modules: a battery recharging circuit, a laser emitter and photodetector pair, and a Wi- Fi connectivity

The project described here is a solar powered intrusion detection system consisting of three modules: a battery recharging circuit, a laser emitter and photodetector pair, and a Wi- Fi connectivity board. Over the preceding seven months, great care has been taken for the design and construction of this system. The first three months were spent researching and selecting suitable IC's and external components (e.g. solar panel, batteries, etc.). Then, the next couple of months were spent ordering specific materials and equipment for the construction of our prototype. Finally, the last two months were used to build a working prototype, with a substantial amount of time used for perfecting our system's packaging and operation. This report will consist of a detailed discussion of our team's research, design activities, prototype implementation, final budget, and final schedule. Technical discussion of the concepts behind our design will assist with understanding the design activities and prototype implementation sections that will follow. Due to the generous funding of the group from the Barrett Honors College, our overall budget available for the project was $1600. Of that amount, only $334.51 was spent on the actual system components, with $829.42 being spent on the equipment and materials needed for the testing and construction of the prototype. As far as the schedule goes, we are essentially done with the project. The only tasks left to finish are a successful defense of the project at the oral presentation on Friday, 29 March 2013, followed by a successful demo on 26 April 2013.

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  • 2013-05

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Dendritic Electrodes as an Alternative Model for Current Collection in Solar Cells

Description

Exploring solar cell model alternatives using electrochemically deposited dendrites as a form of current collection to increase efficiency and top electrode transparency.

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Date Created
  • 2013-05

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LED Bike Wheel

Description

The apparent phenomenon of the human eye retaining images for fractions of a second after the light source has gone is known as Persistence of Vision. While its causes are

The apparent phenomenon of the human eye retaining images for fractions of a second after the light source has gone is known as Persistence of Vision. While its causes are not fully understood, it can be taken advantage of in order to create illusions which trick the mind into perceiving something which, in actuality, is very different from what the mind portrays. It has motivated many creative engineering technologies in the past and is the core for how we perceive motion in movies and animations. This project applies the persistence of vision concept to a lesser explored medium; the wheel of a moving bicycle. The motion of the wheel, along with intelligent control of discrete LEDs, create vibrant illusions of solid lines and shapes. These shapes make up the image to be displayed on the bike wheel. The rotation of the bike wheel can be compensated for in order to produce a standing image (or images) of the user's choosing. This thesis details how the mechanism for conducting the individual LEDs was created in order to produce a device which is capable of delivering colorful, standing images of the user's choosing.

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  • 2016-05

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Simultaneous Transmit and Receive Antenna with Built in Self-Test Unit: Analysis of Trace Error Simulation

Description

The capstone portion of this project was to use the established STaR antennas and add a Built in Self-Test system to ensure the quality of the signals being received. This

The capstone portion of this project was to use the established STaR antennas and add a Built in Self-Test system to ensure the quality of the signals being received. This part of the project required a MatLab simulation to be built, a layout created, and a PCB designed for fabrication. In theory, the test BiST unit will allow the gain and delay of the transmitted signal and then cancel out unneeded interference for the received signal. However, this design required multiple paths to maintain the same lengths to keep the signals in phase for comparison. The purpose of this thesis is to show the potential drop-offs of the quality of the signals from being out of phase due to the wires that should be similar, being off by a certain percentage. This project will calculate the theoretical delay of all wires being out of sync and then add this delay to the established MatLab simulation. This report will show the relationship between the error of the received variables and what the actual generated values. And, the last part of the document will demonstrate the simulation by creating a signal and comparing it to its received counterpart. The end result of the study showed that the percent error between what is seen and what is expected is near insignificant and, hence, not an issue with regards to the quality of the project.

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  • 2016-05

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Simultaneous Transmit and Receive Antenna: Analysis of Measurement Accuracy on Performance

Description

The purpose of the Simultaneous Transmit and Receive Antenna project is to design a test circuit that will allow us to use an antenna to both send out and receive

The purpose of the Simultaneous Transmit and Receive Antenna project is to design a test circuit that will allow us to use an antenna to both send out and receive a signal at the same time on the same frequency. The test circuit will generate DC voltage levels that we can use to solve for the gain and delay of the transmit interference, so we will then be able to cancel out the unwanted signal from the received signal. With a theoretically perfect setup, the transmitted signal will be able to be completely isolated from the received signal, leaving us with only what we want at the output. In practice, however, this is not the case. There are many variables that will affect the integrity of the DC output of the test signal. As the output voltage level deviates from its theoretical perfect measurement, the precision to which we are able to solve for the gain and delay values decreases. The focus of this study is to estimate the effect of using a digital measurement tool to measure the output of the test circuit. Assuming a voltmeter with 1 volt full range, simulations were run using measurements stored at different bit resolutions, from 8-bit storage up to 16-bit storage. Since the physical hardware for the Simultaneous Transmit and Receive test circuit is not currently available, these tests were performed with an edited version of the Matlab simulation created for the Senior Design project. The simulation was run 2000 times over each bit resolution to get a wide range of generated values, then the error from each run was analyzed to come to a conclusion on the effect of the digital measurement on the design. The results of these simulations as well as further details of the project and testing are described inside this document.

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  • 2016-05

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Solar Powered Amphibious Transport

Description

The Solar Powered Amphibious Transport (SPAT) is an amphibious hovercraft that uses solar energy as a power source and is fully controlled via iOS application on a phone or tablet.

The Solar Powered Amphibious Transport (SPAT) is an amphibious hovercraft that uses solar energy as a power source and is fully controlled via iOS application on a phone or tablet. The hovercraft field is relatively unexplored with a solar power source, and one of the goals of the SPAT was to spark interest in sustainable hovercraft design. By challenging the potential of solar power, the SPAT proves that solar energy can be used in high power transportation applications. The second motive behind the creation a hovercraft was for it to serve as a disaster relief vehicle. A hovercraft can traverse both ground and water, which makes it ideal in flooded areas. With the SPAT being remote controlled it can allow the operator to stay at a safe distance while sending supplies or rescuing a person. The SPAT design covered multiple size options, however a small prototype version was built to serve as a proof of concept that a larger solar hovercraft is possible. Our analysis suggests that a larger craft will be able to carry more weight, and be more power efficient. A larger SPAT could help deliver supplies or rescue stranded people after a flood or hurricane. One issue faced however, was that many hovercrafts are highly expensive. The SPAT prototype was designed on a tight budget that did not exceed $800. The possibility of achieving this cost levels allows hovercraft to be a reasonable option for disaster relief agencies. After many long hours spent the SPAT became a fully operational remote control solar powered hovercraft.

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Date Created
  • 2017-05

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LoRa Weather Station

Description

Communication between the physical and digital world via software, embedded sensors and network connectivity is referred to by the term, the "Internet of Things" (IoT) [1]. The IoT transforms natural

Communication between the physical and digital world via software, embedded sensors and network connectivity is referred to by the term, the "Internet of Things" (IoT) [1]. The IoT transforms natural objects into "smart devices" to improve accuracy, reduce human intervention, and provide real-time data [1]. Smart weather stations that upload information, including temperature and humidity, to the Internet are already available. However, these products are often expensive and programmed only for single-purpose use. The LoRa Weather Station is a low cost, low power and low maintenance IoT solution that combines Microchip Technology's LoRa RN2903 module along with Mikroelektronika's Weather Click sensor. This report discusses how the LoRa Weather Station was created, primarily focusing on the LoRa gateway setup by a Raspberry Pi local web server. This project was completed by four electrical engineering students in the EEE 488 and 489 Senior Design courses at Arizona State University from Fall 2016 to Spring 2017. Total expenses for the project were $717.84, including the LoRa gateway which amounted to $104 (see Appendix C for the Bill of Materials).

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Date Created
  • 2016-12

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Hot Car Baby Monitor

Description

Year after year, babies are dying after being left behind in cars that reach dangerous levels of heat. This project, conducted by the Hot Babies Senior Design Team, aims to

Year after year, babies are dying after being left behind in cars that reach dangerous levels of heat. This project, conducted by the Hot Babies Senior Design Team, aims to solve this growing issue with the development of a hot car baby monitor. This device is integrated with multiple sensors: temperature, sound, carbon dioxide, and motion in order to detect life inside of a hot car. By using different sensors, a combination of threshold activated signals can be used to provide high quality monitoring and reduce false alarms from outside noise. Once the algorithms predict the presence of a living being inside a dangerously hot vehicle, the baby car monitor will send out text messages warning designated parents and/or guardians of the issue. The baby car monitor is further optimized with a low battery indicator and a sleep mode feature. The schedule of the project is separated into the fall and spring semesters. For the fall semester, all of the sensors and the microcontroller were purchased and tested individually. For the spring semester, all of the sensors were integrated together on a PCB and tested under hot car environments. Additionally, features such as the text messaging interface and the sleep mode were added. The budget of the final working product is roughly ~ $200. The cost includes the different sensors, microcontroller, data plan, text messaging module, and PCB. When mass produced, the cost is expected to go down.

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Date Created
  • 2017-05

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Electronic Body Protectors: Improving upon an unbiased method to judge Taekwondo Competitions

Description

In competitive Taekwondo, Electronic Body Protectors (EBPs) are used to register hits made by players during sparring. EBPs are comprised of three main components: chest guard, foot sock, and headgear.

In competitive Taekwondo, Electronic Body Protectors (EBPs) are used to register hits made by players during sparring. EBPs are comprised of three main components: chest guard, foot sock, and headgear. This equipment interacts with each other through the use of magnets, electric sensors, transmitters, and a receiver. The receiver is connected to a computer programmed with software to process signals from the transmitter and determine whether or not a competitor scored a point. The current design of EBPs, however, have numerous shortcomings, including sensing false positives, failing to register hits, costing too much, and relying on human judgment. This thesis will thoroughly delineate the operation of the current EBPs used and discuss research performed in order to eliminate these weaknesses.

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Date Created
  • 2016-05

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The Rest Egg Smartphone Connection: Accessibility, Utility, and Ease of Use via Mobile Application Support

Description

This document introduces the need for the Rest Egg system and defines an accessible method of smartphone integration. Excessive noise can prevent recovering patients and special needs persons from resting

This document introduces the need for the Rest Egg system and defines an accessible method of smartphone integration. Excessive noise can prevent recovering patients and special needs persons from resting correctly. The Rest Egg was designed for these people- people who are in critical need of quality rest but are often unable to eliminate stressors themselves. This system ensures their environment is calm by alerting caretakers' smartphones if noise reaches abrasive levels. Smartphones were the preferred device due to the wide spread of such devices in today's market. After making open sourcing a goal, something ubiquitous and affordable \u2014 yet usable and dependable \u2014 was necessary for the alert system. These requirements lead to the election an online alert service: Pushover, a trademark and product of Superblock, LLC.

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Date Created
  • 2016-05