Ultiboard

Home Up

Reading Assignment

Again you have two reading assignments:

bullet

Read chapter 2 of Engineering Design for Electrical and Computer Engineers.  Pay particular attention to section 2.5 since 80% of projects that fail in senior design are due to the team not doing enough research.

bullet

Skim through the tutorial material on Sharepoint to learn how to use UltiBoard.  This program is a companion to MultiSim and is used to go from a schematic diagram to a printed circuit board.  Make sure you organize the material you find useful so you can refer to it later in the course.

Motivation

The reading in Chapter 2 should familiarize you with the first step of the design process- choosing a project.  Early in your career it is very rare you get to choose a design project- one is usually assigned to you.   However as you gain more experience in engineering you will move into project selection and definition.  Pay particular attention to the section on researching projects.  This is a critical skill.

Since senior design focuses on the entire design process, from project definition to final prototype, it is critical that the devices you make are done to professional standards.  This means designing and building printed circuit boards.  Ultiboard is a useful tool which allows you to go from a schematic to PCB layout fairly quickly. 

Reading Goals
bullet

Be able to identify project needs

bullet

Know how to begin researching a project

bullet

Turn your schematic diagram into a board layout on a board of a given size using both auto routing and manual routing,

bullet

Make sure all components have valid footprints and create or edit footprints if necessary.

bullet

Create a printout or .DXF file of your results for milling, etching, of professional PCB fabrication.

Required Reading
bullet

 Chapter 2 of Engineering Design for Electrical and Computer Engineers.

bullet

In Sharepoint read the tutorial material at Faciliites Training Tutorials Ultiboard
bullet

NI Ultiboard Tutorial.pdf- using the board layout package

bullet

Creating components and pads with Multisim and Ultiboard.doc- one page outline on creating components and footprints

bullet

Keep-in Keep-out layers.doc- this explains how to keep from putting vias under components.

Milestones Due in Class

Ultiboard project results.  Every student in the class must submit a different board layout; no copying!  Details on the project are given below this table.  What you need to submit at or before the start of class are:

bullet

Your Ultiboard file.  You will need to put the file in the Desire2Learn drop box.

bullet

A negative image print out of both sides of your board on a 1:1 scale.

bullet

The results of your free DFM check.

bullet

A 3D image of your board layout from a top-down view.

Other Resources
bullet

Practical Teaching Ideas for Multisim.pdf- a full semester course with many examples of simulation on Sharepoint.  Examples files are in the folder PTI Circuits

bullet

Many resources are available at this NI Development Zone site and this NI site

bullet

Tutorial on how to Create a Custom Component in NI Multisim

bullet

Tutorial on how to Define a Custom Footprint in NI Ultiboard

bullet

Training Resource:  NI Multisim 101 Webinar.

bullet

This is an online training website with a three hour class

bullet

MultiSim Support Website

bullet

Ultiboard Support Website

bullet

MultiSim Components Reference Guide on Sharepoint provides details on all the components MultiSim supports.

In Class Exercise Preview

You will be introduced to the two team projects for the second design project that starts in week 6 and create a needs hierarchy.  The instructor and TA's will be available to answer questions about the projects.

 

Electronic Firefly Circuit Layout Details:

bulletBuild the circuit on a PCB that is a square 2.5" on a side.  You will need to change the board size from the default in Ultiboard.
bulletHave one IR LED and one phototransistor centered on each side of the board looking outwards
bulletCreate new components including symbols and footprints for the IR LEDs and phototransistors from their datasheets. 
bulletDetails for Layout:
bullet

The IC is a SOIC package

bullet

Traces should be 20 mils wide with 20 mil separation.

bullet

All other components are 1206 surface mount except for:

bullet

the 100 uF capacitor- SMT package from Lee's shop with footprint P-ELKO-E,

bullet

56 ohm resistors- through hole,

bullet

potentiometer footprint TRIPOT_93P

bullet

the visible LED is SMT with footprint LED_T6XXX

bullet

Use SMT testpoints from the online catalog at pins 2 and 3.  You may have to create a foot print for these.  The Mouser.com search term is "smt test point" and we have part number 5016

bullet

The power should come through a standard 2 pin through hole SIP header with 100 mil pin spacing. 

bullet

The phototransistors are QSE133 and the LEDs are QEE113 both sidelooking from Fairchild with datasheets available on Mouser or on Sharepoint.  

bullet

Use the through hole vias in the ECEN components catalog for vias.  You will need to change the default via size in Ultiboard to be 20% larger diameter than the outer diameter of the via so there is room to apply solder.  The Mouser search term is "T123/500" for specs on our vias.  A 57 mil hole is required for these vias.

bullet

Put text on your board with your name so we can identify you.

bulletYour goal is to have the circuit autoroute completely.  One sort of funky aspect of Ultiboard is that it does not automatically allow autorouting on the top and bottom of the board by default.  To set this click on the Nets tab, find the column named Routing Layers, and make sure all nets can route on the top and bottom by setting the selection to 11 or double clicking and making sure top and bottom copper layers are selected for each net.
bulletExport your PCB as a Gerber RS-274-X file and run it through the free design rule checker at www.freedfm.com.  Make sure you include all layers needed to define your board including silkscreen and solder mask.

Important Links
4013 Grades Sharepoint Desire 2 Learn Catalog

Search for:

The material appearing on this web site is copyright 2004-2009 by the School of Electrical Engineering at Oklahoma State University. All Rights Reserved.