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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Jeffrey Chen's Webpage</title>
<!-- Bootstrap core CSS -->
<link href="./css/bootstrap.min.css" rel="stylesheet">
<link href="css/starter-template.css" rel="stylesheet">
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="./index.html">About me</a>
</div>
<div class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="./JeffreyChenComputerEngineer.pdf">Resume</a></li>
<li><a href="mailto:[email protected]">Contact me</a></li>
</ul>
</div><!--/.nav-collapse -->
</div>
</div>
<br>
<div class="container">
<table border="0" cellpadding="5">
<tbody><tr align="top">
<td align="top"><img src="./jeff_mugshot.jpg" Hspace="10"></td>
<td align="top">
<br>
<b>Jeffrey Chen </b>
<br>Student
<br> <a href="http://www.cs.ucr.edu/">
Department of Computer Science and Engineering
<br> </a> <a href="http://www.ucr.edu/">
University of California, Riverside
<br> </a>Riverside, CA 92521
</td></tr>
</tbody>
</table>
<!--
<div class="hero-unit">
<h4>Jeffrey Chen</h4>
<p>Hello guys i am a ".hero-unit" and you can use me if you wanna say something important.</p>
<p><a class="btn btn-primary btn-large">Super important »</a></p>
</div><!-- .hero-unit -->
<hr>
<div class="row">
<div class="span12">
<h3><center>About me</center></h3>
I'm Jeffrey Chen, a Computer Engineer currently working towards a BS in Computer Engineering.
<br>I love Embedded Systems, and am currently looking for an full time, part time, or internship in the field.
</div><!-- .span12 -->
</div><!-- .row -->
<hr>
<div class="row">
<div class="span12">
<h3><center>Projects</center></h3>
<h6><center>Pictures coming soon!</center></h6>
<h4>Servo motor controller error handler</h4>
<p>Using a PIC18F Microchip processor, this system was designed to detect errors for a Litho-Flexo label
printing machine and to stop the machine if the appropriate switches are toggled on error. Errors handled
include missing material, using a photo eye, over-tension, and jam detection.</p>
<p>The main challenge in developing on this chipset was the issue of configuration. This was my first
large project, and the PIC18F was the largest microprocessor I had dealt with. However, with the usage of
documentation and some outside help, I was able to stop the machine when necessary.</p>
<h4>Material Unwinder/Rewinder</h4>
<p>The problem with using an on-off system for providing rolled, stretchy material to a printer is the jerk cycling the motor from 100% to 0%. The answer is to then keep the material being fed into the printer at the same pace as it being both wound and unwound. We know the tension of the material based by placing a bar being pulled down by gravity and gauging its distance from the bottom. Using an Arduino, we can pulse the motor using the Arduino's built in PWM to then keep the motor unwinding the material at a constant rate that will increase or decrease based upon the distance the bar is from the bottom.</p>
<h4>Bow and Arrow game</h4>
<p>An embedded systems project utilizing the ATMega1284 microprocessor. Two players take turns
shooting arrows at each other using a potentiometer and button, displayed on a LCD screen,
the inputs read through USART. The report with more information can be found here. </p>
<h4>Self-made hidden-desk</h4>
<p>A hardware woodworking project that combines the functionality of a bed and desk into a
space saving design, based upon the idea of a similar product found here. This was the first time I was making
a wood object not for myself, and really drove home the concept of quality control. I made 3 during
construction, using 12 piceces of 4'x8'x3/4" plywood, and am now living with one.</p>
</div><!-- .span12 -->
</div><!-- .row -->
<hr>
<div class="row">
<div class="span12">
<h3><center>Fields of experience</center></h3>
<ul>
<li>CNC Machines
<li>Laser engraving
<li>Plastics extrusion
<li>Woodworking
</ul>
</div><!-- .span12 -->
</div><!-- .row -->
</div><!-- .container -->
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="./js/bootstrap.min.js"></script>
</body>
</html>