A 128K-bit CCD buffer memory system

A prototype system was implemented to demonstrate that CCD's can be applied advantageously to the problem of low power digital storage and particularly to the problem of interfacing widely varying data rates. 8K-bit CCD shift register memories were used to construct a feasibility model 128K-bit buffer memory system. Peak power dissipation during a data transfer is less than 7 W., while idle power is approximately 5.4 W. The system features automatic data input synchronization with the recirculating CCD memory block start address. Descriptions are provided of both the buffer memory system and a custom tester that was used to exercise the memory. The testing procedures and testing results are discussed. Suggestions are provided for further development with regards to the utilization of advanced versions of CCD memory devices to both simplified and expanded memory system applications

Maze Mouse

This report is intended to provide an insight view of the Maze Mouse project. The first chapter serves astheintroduction to theproject, which covers the background of study, problem statement, and objectives and scope of study. The objective of this project is to produce a prototype of a mouse that can find itsown way out of a maze smoothly, butnot necessarily very quickly. This will be explained later in the report. This project requires strong basics in electronics, covering three important aspects of the mouse which are microcontroller, infrared sensor and stepper motor. The earlier partof the second chapter describes the details of the Sterling Mouse, an example of a mazemouse. The Sterling Mouse was created by Nick Smith as a participant in the Micromouse Competition held in the United States. The third chapter of this report presents the methodology used in completing thisMaze Mouse project. This includes the purchasing and procurement of the components, circuit construction, programming and integration of the mouse's separate circuits. In the next chapter, you will be provided with the details of the project work, which focuses on howthe prototype gets to work

Synchronization and Delay Techniques for Driving lMHz Totem-Poled Power MOSFET Configuration

This project discusses about the synchronization and delay techniques that are suitable for totem-poled power MOSFET configuration operating at high speed. Modification has been made to the proposed synchronization circuit fur earlier PWM controllers that have an operating frequency ranging from 80 kHz to 120 kHz. Experimentation is carried out to obtain the most suitable means in synchronizing the PWM signals and adding delay function. The synchronization and delay network is able to operate at high switching frequency of 1 MHz. In addition, two different sets of complementary square-wave are achieved at duty cycle of 50 % and 20 %. The result with 20 % duty cycle can be used for previous work in investigation of high frequency effects on soft switch-switched synchronous rectifier buck converte

High-resolution width-modulated pulse rebalance electronics for strapdown gyroscopes and accelerometers

Three different rebalance electronic loops were designed, implemented, and evaluated. The loops were width-modulated binary types using a 614.4 kHz keying signal; they were developed to accommodate the following three inertial sensors with the indicated resolution values: (1) Kearfott 2412 accelerometer - resolution = 260 micro-g/data pulse, (2) Honeywell GG334 gyroscope - resolution = 3.9 milli-arc-sec/data pulse, (3) Kearfott 2401-009 accelerometer - resolution = 144 milli-g/data pulse. Design theory, details of the design implementation, and experimental results for each loop are presented

WIRELESS ELECTROMYOGRAPH RECORDER

Muscles generate low voltages which are around 100 mV when they contract. These voltages are weakened by internal tissues and the skin. Even though the voltages are weak but they can be measurable at the surfuce of the skin. Electromyography (EMG) recorder is used to measure a muscle electrical activity that occurs during muscle contraction and relaxation cycles. In medical applications, people mostly used a wired EMG recorder. However, the advanced technology had allowed wireless collection and recording of muscle electrical activities using an EMG recorder. Thus this report is going to discuss in depth about a wireless EMG recorder. This project background study will include problem statements to justifY the need of this project, objectives, scope and limitation of the project as well as project feasibility. Literature reviews will also cover aspects like EMG signal, conventional EMG recorder, and types of wireless network that can be used. In the methodology part, the proposed design, tool and equipment will be discussed further. Result and discussion will explain about the output obtained from the project. This report will be wrapped up with a conclusion

Obstacle Sensing Autonomous Mobile (OSAMO) Robot

The objective of this project is to design and produce an Obstacle Sensing Autonomous Mobile (OSAMO) Robot that can be use in the industrial or for domestic purpose. Robots may be used to perform tasks that are too dangerous or difficult for human, such as radioactive waste clean-up, or maybe perform a simple task and various daily activities domestically such as delivers some package to the specific destination or cleaning the house

SMART GUIDANCE ROBOT

This project comprises the design and implementation of a fully autonomous Self Guidance Robot (SGR). The robot is an embedded system that integrates hardware and software in its design and operation. The hardware design includes a PIC microprocessor and other components that provide the circuitry for the robot operation. The software design will include programs written in assembly language. The main objective of the self guiding robot is to guide itself through a predeterminedpath and avoid any obstacle in its path. The physical structureof the self guiding robot is mainly built using aluminum. And the tyre ofthe self guiding robot is built using fiberglass cylinder. A transmitter receiver pair of ultrasonic sensors is used for the ultrasonic circuitry. The transmitter primarily consists ofLM555 timer that is used to generate the 40 kHz signal to drive the ultrasonic sensors. The receiver circuit is primarilyconsists of two LM741 op amp. The op-amp is used to boost the signal received by the receiver transducer. The receiver circuit output is then fed to the PIC16f877 for processing. A PIC16f877 and PIC16f84 microcontroller are used in this project. It functions as the brain of the self guiding robot. The microcontrollers coordinate the motions of the robot by controlling the servo and DC motor based on the signal it received from the ultrasonic receiver circuit. An H-bridge circuit is used to control the motors' forward/reverse motion. The Hbridge primarily consists of 2 L298 chip. The L298 IC is a motor driver integrated circuit

IMPLEMENTATION OF AUTONOMOUS BALL FEEDER MOBILE ROBOT

The objective of the project is to design and implement autonomous ball feeder mobile robot. The robot will be able to feed the ball into the outer torch automatically. The purpose of designing the robot is to enter the ROBOCON competition organized by SIRIM. This is the first participation of University Technology PETRONAS in ROBOCON competition since it is an annually competition from 2002. Without any past experience on building a robot, the Electrical & Electronic department has given the author challenges to build an autonomous robot base on certain constrains restricted by the rules stated by the organizer. The robot will be bigger in size and capable to carry heavier loads. The scope of the study will be mainly on the design and implementation of the robot from scratch or little knowledge. The study will be handled part by part from researching on the whole part of the robot until the implementation of the workable robot. The robot implementation can be divided into two main sections which is hardware and controller part ofthe robot. In the discussion part, all the robot implementation will be discussed in more detail as to make sure the objective of the project can be achieved successfully. The problem and the solution for the problem will also be discussed base on the student point of view. Before ending the chapter, some recommendation has been suggested for further improvement for the next ROBOCON team members. The suggestions made are base on the current available technology and also the experience gain by the author through out this design project. To conclude the thesis paper, the conclusion will wrap up the whole findings in a general view