Spring 2005 EEF Mini-Proposal
Project: Embedded Systems PCBs
DESIGN 1: 8051 Development Board PCB
DESIGN 2: Signal Integrity Analysis PCB
DESIGN 3: USB Development Board PCB
February 16, 2005
Lawrence Kiss
Master’s Candidate
Department of Electrical Engineering
Lawrence.Kiss@colorado.edu
Kunal Shenoy
Master’s Candidate
Department of Electrical Engineering
Kunal.Shenoy@colorado.edu
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DESIGN 1: 8051 Development Board PCB
Existing perf board requires
extensive wire wrapping, which
is time consuming. PCB will
have traces already routed for
many signals, saving time.
Example of student board at end
of semester after all components
have been added. PCB will have
similar appearance.
Existing perf board used by students can
easily break. Board requires lots of drilling
which is time consuming and prone to error.
PCB will have all holes already drilled and
will be much stronger.
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DESIGN 2: Signal Integrity Analysis PCB
Signal integrity, or the quality of electrical
signals as they propagate between circuit
components, is an extremely important
issue facing all high speed designs today.
Our PCB will allow students to investigate
signal integrity issues, including:
crosstalk, clock skew, conductor
termination, ground plane effects,
ringing, decoupling, and metastability
The design of the traces on this PCB is
as important as the components that will
be loaded into the board. This board is
expected to be slightly larger and more
expensive than the 8051 and USB PCBs.
An earlier prototype was
constructed by a former
student, but the design was
flawed and didn’t show the
signal integrity issues it
should have. We’re learning
from these flaws so that our
PCB will work correctly.
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DESIGN 3: USB Development Board PCB
Existing Cypress USB development
board costs $500 each. This limits
the number of boards that can be
purchased to support student
learning. There is also no budget for
repair or replacement of these
expensive boards.
Our proposed development board will
be similar to this picture, and will be
affordable for students – no more
than $60, and closer to $30-$40 in
quantity. Cypress has donated the
chips for these boards.
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Budget & Schedule
Item
DESIGN 1 (8051 Development Board PCB):
Prototype PCB manufactured (Rev. 1)
Prototype PCB manufactured (Rev. 2)
Parts for prototype boards (sockets, ICs)
Unit Price Quantity Total Cost
$40.00
$40.00
$25.00
2
2
4
$ 80.00
$ 80.00
$100.00
DESIGN 2 (Signal Integrity Analysis PCB):
Prototype PCB manufactured (Rev. 1)
Prototype PCB manufactured (Rev. 2)
Parts for prototype boards (sockets, ICs)
$50.00
$50.00
$25.00
2
2
4
$100.00
$100.00
$100.00
DESIGN 3 (USB Development Board PCB):
Prototype PCB manufactured (Rev. 1)
Prototype PCB manufactured (Rev. 2)
Parts for prototype boards (sockets, ICs)
$40.00
$40.00
$20.00
2
2
4
$ 80.00
$ 80.00
$ 80.00
Total
$800.00
Revision 1 of each design will be completed and tested during the Spring 2005 semester.
Many hours of work have already been invested in these designs.
Revision 2 of each design will be completed and tested by the end of Summer 2005.
Rev. 2 will improve upon the first revision and fix any issues uncovered during testing.
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Why EEF Should Fund This Proposal
• Project benefits many students, has a lasting impact.
• Project has a high probability of success – much work
has already been done. PCBs will be ready for use by
other students by Fall 2005.
• PCBs will improve the learning experience for embedded
systems students. Using PCBs instead of perf board in
lab will save students significant development time.
• Project has other guaranteed support from Cypress and
Professor McClure. PCB development work will be
supervised in an independent study.
• Project has an excellent return for the investment – a
great value for the EEF.
Thank you!
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BACKUP SLIDES
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Existing Perf Board
Perf Board can easily
break when drilling
holes or if the board is
accidently dropped
New PCB will already have
holes for all components,
saving students time currently
needed to drill holes
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Student-Designed
USB Peripheral
Cypress EZ-USB FX
Development Board (Kit),
with Student-Developed
Compact Flash Interface.
Dev. Kit is $500
USB development hardware and software
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PCB Design: Schematic and Layouts
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