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projects:g10:start [2014/04/25 15:04] cs233151projects:g10:start [2014/05/03 00:40] (current) egz
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    - Put to practical use the many concepts taught during our undergraduate studies into this project.    - Put to practical use the many concepts taught during our undergraduate studies into this project.
-   - Design software showcasing two of the tricorder’s main functions.+   - Design software showcasing two of the Tricorder’s main functions.
    - To have fun in the process.    - To have fun in the process.
  
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 =====  Images (Setup/Schematics) ===== =====  Images (Setup/Schematics) =====
 +
 +Initial Design Concept of Tricorder
 +{{ :projects:g10:Initial_Design.jpg }}
  
 Hardware Testing the Main board with Gumstix COM  Hardware Testing the Main board with Gumstix COM 
 +{{ :projects:g10:2013-12-31_10.35.32.jpg }}
  
-{{:projects:g10:2013-12-31_10.35.32.jpg|}}+3D Schematic of Final Design of Tricorder 
 +{{ :projects:g10:tricorder_3D.jpg?350 }}
  
 ===== Design Choices ===== ===== Design Choices =====
  
-==== Casing ====+==== Processor ====
  
-In choosing the material for our case, we wanted something durable, light weight, not expensive, be easy to obtain and be malleable enough so that it could be designed by variety of methods.  We quickly decided on acrylic plastic as our material of choice.  It met all the criteriaand we have experience with it.+Using the KISS design principle, we decided early on to use Computer on a Module for our main processor.  That way the hardware architecture would already be connected to the processorleaving us more time to deal with other design decisions.  We ultimately choose a Gumstix Overo processor, that uses the ARM-A8 architecture, is compact (58 mm x 4.2 mm), lightweight (42 g), includes 512 MB NAND ROM and a Micro SD port to store software.
  
-Initial Design Concept of Tricorder+==== Input / Output Methods ====
  
-{{ :projects:g10:Initial_Design.jpg }}+It was known right from the start that an LCD module would be used to display any sensor data.  But, what was not known was what input methods would be used for a user to interact with the User Interface of the Tricorder.  As the initial design shows, we considered using push buttons which would allow for tactile sensation when a user presses them.  When choosing the LCD module, we considered a non-touch screen version, a resistive touch screen version and a capacitive touch screen version.  The resistive touch version could only detect one touch gesture at a time, while a capacitive touch version could detect multiple.  Do to cost, we chose the resistive touch version, was able to get that working, so we decided to remove the push buttons, and just use touch gestures on the LCD module for user input.  We chose a 4.3" Samsung Resistive Touchscreen LCD with 480 x 272 pixel resolution.
  
-3D Schematic of Final Design of Tricorder +==== Casing ==== 
-{{ :projects:g10:tricorder_3D.jpg?350 }}+ 
 +In choosing the material for our case, we wanted something durable, light weight, not expensive, be easy to obtain and be malleable enough so that it could be designed by a variety of methods.  We quickly decided on acrylic plastic as our material of choice.  It met all the criteria, and we have experience with it.  To shape, cut or mold the acrylic, we considered three options, a laser cutter, a 3D printer and mill the acrylic.  A laser cutter is available from the Faculty of Arts Design Program, but there is a cost, it cannot make angle cuts for beveling, and students in that program would have priority to use it before us.  A 3D printer is available from the Department of Electrical Engineering and Computer Science Department, it is free, there is no wastage, but research has shown that these cases tend not to be the most durable and there is some leeway between dimensions wanted to be printed and what actually is printed, resulting in sanding the printed plastic to get the desired dimensions.  With milling, the various tools in the Design Shop could be used to make the case to our specifications, it was freely available, and we could choose the plastic we wanted to use, so it could be the exact colour we wanted as well.  Ultimately, we ended up going with milling the plastic, because we could get the exact colour and shape we wanted, and we would be directly involved in every step of this design process.
  
 ==== Ports ==== ==== Ports ====
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 **Atmospheric** **Atmospheric**
  
-{{ :projects:g10:software2.jpg?350 }} 
  
 Using a digital pressure sensor to calculate relative  Using a digital pressure sensor to calculate relative 
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 ** Demonstration Jan. 8th** ** Demonstration Jan. 8th**
 {{:projects:g10:movie.mpg|}} {{:projects:g10:movie.mpg|}}
 +
 +===== Video =====
 +
 +Lassonde ENG4000 Project (2013-14) - Group 10 [[http://youtu.be/gPOSzc_sno0]]
 +
  
  
projects/g10/start.1398438278.txt.gz · Last modified: 2014/04/25 15:04 by cs233151

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