EECE.3110 Course Project (Exam #2)
11/2019 1
Design an “electronic candle” such that you light the candle with a switch and you “blow out”
the flame of the candle “the LED” by means of blowing into a microphone. This project can be
extremely creative or it can be dull and boring. The candle will also be powered by either a
attery (simulate using a power supply) or a wall power supply. The candle will automatically
switch to battery when the wall power supply is removed and will automatically return to the
wall power supply once it is available. The wall power supply will be designed using, as a
minimum, a transformer and a LM7805.
Creativity will gain points (extra credit). Dull, boring, but functions will result in passing the
exam, however, your project will most likely never pass the consumer purchase test.
A PCB will be designed using the Altium software for the final circuit developed.
NOTE: An actual PCB will NOT be printed.
You will work alone. DO NOT DISCUSS YOUR DESIGN WITH ANYONE. Design and
demonstration is worth 100 points total.
Design Requirements:
1. Your design MUST perform the following, as a minimum:
a) Light the “candle(s)” by pressing a switch
) When you “blow into” a microphone, the “candle(s)” extinguish, thus LED(s)
stops glowing
c) Pressing the switch again will relight the “candle(s)”
d) Will be powered by either a wall power supply (see specifications below) or a
attery (simulate using a power supply).
e) The candle will automatically switch to battery when the wall power supply is
emoved and will automatically return to the wall power supply once it is
available.
The wall power supply will be designed using, as a minimum, a transformer and a
LM7805.
2. You will NOT use any type of microprocessor, microcontroller, or other programmable
devices.
EECE.3110 Course Project (Exam #2)
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3. Design and test your system in Multisim PRIOR TO physical circuit construction on
your
eadboard.
4. You MUST use in your design at least three major components used during the semester.
Major components are: Op amp, diode, and transistors (MOSFET and BJT).
NOTE 1: Each individual component used counts towards the total. For example, if 2
diodes are used, then you have satisfied 2 of the three required components.
NOTE 2: Do NOT use a major component if it adds no value to the circuit. You need to
explain your circuit and how each major component contributes to the circuit.
5. The design MUST use a microphone that “extinguishes” the flame.
6. *** The best designs shall have minimum user interface.
7. Creativity is a must, meaning that your design will dazzle your prospective customers.
8. Utilize materials and concepts learned this semester.
9. On/off type switches can be as simple as a wire jumper.
10. If additional quantities or parts are required, you may obtain them as follows:
a) Resistors and capacitors are available in the parts bins located in BL-416 and BL-
424. If the items are unavailable, they can be ordered through the ECE
Stockroom (see below).
) ECE Stockroom App: The App is located on the ECE UML Homepage
https:
www.uml.edu/Engineering/Electrical-Compute
default.aspx
Create a list of items in the app. If you cannot locate the item(s) in the App, add
the request to the “ADDITIONAL ITEMS NOT IN INVENTORY OR SPECIAL
ORDER ITEM” section of the app. Often time the stockroom has basic
components that are not yet listed in inventory
The App will notify you by email when your order is ready.
Materials can be picked up in the ECE Stockroom (BL-432) during the hours
https:
www.uml.edu/Engineering/Electrical-Compute
default.aspx
EECE.3110 Course Project (Exam #2)
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when the Stockroom is open (see BL-432 door for hours of operation).
YOU MUST BRING YOUR SCHEMATIC AND PARTS LIST to the stockroom
or you will not receive parts.
DO NOT wait until the last day or two prior to the due date to order your
components.
11. Design and test your system in Multisim PRIOR TO physical circuit construction on
your
eadboard.
12. Build your design on a
eadboard.
13. Design a PCB board using Altium (it is required that you use this software). You will
only design the board; we will NOT print the board. The Ge
er file will be submitted
with your initial upload. The following information will aid you in using the software.
https:
www.dropbox.com/s/48pn8yxpopv8njk/__Altium_Training_Materials.pdf?dl=1
14. Cite ALL resources used.
15. Extra credit (25%) – Earn up to 25% extra for making your design creative and
marketable. Both the TA and the instructor will evaluate your circuit if you are looking
for extra credit. Points, up to 25, will be given based on their impressions of your
creativity.
Design Hints, Suggestions, and Potential Creativity Starting Points:
1. First and foremost, UNDERSTAND what the intention of your design is (read these
equirements FULLY!
2. Read and understand ALL component datasheets
3. Suggestion: Design in stages, meaning that it is best not to design the entire circuit first
only to find out that nothing works. Break your design into pieces. Work each piece one
at a time. Ensure that each piece works separately, then integrate pieces together. You
will earn points even if the entire circuit does not work as design, but individual pieces do
work.
https:
www.dropbox.com/s/48pn8yxpopv8njk/__Altium_Training_Materials.pdf?dl=1
EECE.3110 Course Project (Exam #2)
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4. Creativity potential: Flickering LED to represent the flame
5. Creativity potential: LED changing color as it flickers
6. Creativity potential: Design the candle to look like a wax candle (3D print maybe)
7. Creativity potential: Ability to add “candles” together similar to adding candles to a
irthday cake representing the age of the person
8. Creativity potential: Add a “Power on” switch and LED indicator
9. Creativity potential: Develop “trick” candles, meaning, when the candles are blown out,
they relight.
Prior to 11:59 PM EST on 12/09/19 you will:
1. Upload a typed word document to Blackboard that contains the following:
a) Provide a detailed written explanation as to how the circuit functions. This write-
up shall be substantial, including schematics.
) List of materials used in your design (components and their values, etc.)
c) Schematic, drawn using Multisim, of your design, including any schematics that
you referenced. Multisim drawing shall show all required components (including
values) and measurement (probe values and oscilloscope values when required)
d) Detailed circuit analysis of your design (include equations where applicable)
e) Results of the tests performed prior to in lab demonstration.
f) Picture of your completed design. Picture needs to include the circuit
g) Screen shot of your PCB layout.
h) OPTIONAL - A link to a short video demonstration that can be used by UML in
displays and other similar areas. By providing a video demonstration link you
acknowledge that UML may utilize your video. If the demonstration is of high
quality, 5 extra credit points will be awarded (in addition to the other extra credit
EECE.3110 Course Project (Exam #2)
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noted)
i) Reference section – Identify ALL references used. NOTE: If you include a
eference, you must make reference to the materials in your write-up.
2. Upload the MultiSim file (.ms14) to Blackboard.
3. Upload the Ge
er file to Blackboard.
During your lab session you will:
1. Demonstrate your design to the TA or instructor. When requested,
display circuit values using both the benchtop oscilloscope and the
Analog Discovery oscilloscope as well as the multimeter.
2. Capture screenshots from both the oscilloscope and Analog Discovery
of the output. Include time/date/serial numbers (when available).
3. Explain to the evaluator how your circuit operates (in detail).
4. Open Altium and show your PCB layout.
5. Answer questions asked by the TA and / or instructor.
6. Upload all screen captures used in your demonstration and other
equested materials.