SETUP AND USAGE OF EE511 NEWSGROUP
Lecture notes (all notes are in allee51199.zip)
Suggested Baseline Parts & Tools for Projects
DATA SHEETS
Updated 1-25-2000
Students will be able to access Lab rooms: ??? CRMS, and 591 AH listed in the SCHEDULE FOR LABORATORY ACCESS. Due to construction the EE499 lab will not be available this semester. Thus we are guests in the EE462 Lab in Room 591 AH. PLEASE LEAVE THE LAB CLEANER THAN YOU FOUND IT! We are quests and we need to maintain a good reputation. LGH will try to have the EE462 lab open Thursday and Friday afternoons.
Construct two circuits: The first is the transmission encoder which will produce 512 pulses (which is a count of 1024) at 1000Hz after a Reset switch is depressed. The pulses form a squarewave. The number of pulses may be displayed using LEDs in binary format. The encoder should have a transmit indicator signal that is high during transmission and low when it is not transmitting (the compliment of this is satisfactory). The second circuit is the receiver decoder. It will receive the pulse train from the transmitter encoder and count the pulses. The count will be displayed using LEDs in binary format. The receiver will have a reset capability so that it will always start counting at 0. Both circuits may share the same ground but must have separate supplies and be on separate breadboards.
GROUPS for Project 1(first name is your group representative)
All groups finished on time (100%)!
The objective of Project #2 is to build and test an optical communications link. Build an opto-electronic transmitter (baseline is an NPN transistor, 2N2222, driving an LED) using an LED or a LASER. Drive the transmitter with your project 1 encoder circuit. On a separate breadboard, construct a receiver. The baseline receiver consists of a pin diode (you may also use a phototransistor), an op-amp pre-amp (LF347). The output of the pre-amp goes to a comparator (2901 or LF347+diode) and is digitized into a "1" or "0." The binary value is fed into the input of the receiver in project 1. The device should give a result the same as project 1 at 1 inch between the transducer and sensor.
GROUPS for Project 2(first name is your group representative)
There are two items added to project 2: (1) a timing pulse and (2) lens apparatus for longer distance. The timing pulse shall go high at the beginning of the pulse transmission and low at the end of the transmission. The timing pulse may be located at either the transmitter or the receiver (designing the pulse circuit for the transmitter would probably be simpler). There are three common opto-electronic links that may be used: (1) Single LED to single Photo-receiver, (2) LED array to single Photo-receiver and (3) Laser to single Photo-receiver. For LED transmitters the required distance for the final project will be 30 feet. For the Laser transmitters the distance will be 100 feet. Both configurations benefit from having a lens apparatus (LGH provides) at the receiver end. In the case of a single LED transmitter, there should also be a lens apparatus at the transmitter end.
A. Students will demonstrate and measure the pulse duration for 20 feet in the laboratory. During this test the device must work with 0 errors to the satisfaction of LGH.
B. Students will measure the beam pattern of the receiver with and without the lens apparatus. With out the lens, the distance between transmitter and receiver transducers will be a far as practical. With the lens, the distance will be the length of the lab table. In both cases, a response (received p-p voltage value) will be mapped as a function of receiver rotation with respect to the transmitter. The range will probably be +/- 45 degrees with about 5 degree increments such that the main beam lobe may be mapped with accuracy. The beam pattern procedure will be presented to LGH for compliance but the data may be taken at anytime.
GROUPS for Project 3(first name is your group representative)
Lasers must run at a 50 foot distance.
LEDs must run at 30 feet.
GROUPS for Preliminary(first name is your group representative)
FIRST LEVEL PAIRING
LEDs
G1@26.7K versus G2@0.5K
G4@14K versus G3@1K
G5@3.6K versus G8@2.9K
LASERS
G6@3.9K versus G7@1.7K
This was the first year that the EE511 contest emphasized speed over distance. The students did an excellent job in developing their devices under this new criterion. All groups were successful in competing in the contest. That is, while there were some glitches, all the devices were able to compete. Below are the group photos, final reports and results of the contest.
Group 2: (left to right) Matt Brackett, Jacob Morton, David Butts, and Weng Hung Kam.
Group 4: Joseph Finley, Atsu Tayake, Abdullah Khan, and Dharshan Medonza.
Group 5: Tim Willis, Jason Jernigan, Jason Isaacs and Wes Wheeldon.
Group 6: (left to right) Jeff Spitler, Mark Tucker, Justin Harbour, Ryan Crace, and Ahmed Alkabra.
Group 7: (left to right) Chris Brockman, Gordan Russell, Doug Clark, Jason Riley and Kevin Le.
Group 8: (left to right) Li Ming Hor, Wei Ping Liaw, Wi Tin Teh, Lip Seng Moey, Edwin Ng.
Staff Photographer: Chris Hassebrook
THE END OF THE MILLENIUM AWARDS
CONTEST RESULTS
LED CATAGORY RANKING
First Place: Group 4
Second Place: Group 1 and Group 5
Third Place: Group 2
Fourth Place: Group 3
Fifth Place: Group 8
LASER CATAGORY
First Place: Group 6
Second Place: Group 7
TOP 5 Rank by Maximum Speed Demonstrated
(This does not match final rank because speeds changed throughout the contest)
G6: 62.9 Khz (LASER), Prelim. Speed = 3.9 Khz
G2: 24 Khz, Prelim. Speed = 0.5 Khz
G4: 18.3 Khz, Prelim. Speed = 14 Khz
G5: 10.5 Khz, Prelim Speed = 3.6 Khz
G1: Gaussian Eliminators, 8.8 Khz, Prelim Speed = 26.7 Khz
BEST FINAL REPORTS
They were all good so this category is somewhat subjective.
First Place: Group 6 ("The EE511 Champion's Homepage").
Second Place: Group 1 ("The Gaussian Eliminators").
Third Place: Groups 3 (The "International") and Group 4 (The "Deadly Diode").