Last Revision: January 2008 Page 1 of 5 ©2008 by the Regents of the University of California. All rights reserved. University of California at Berkeley Physics 111 Laboratory Basic Semiconductor Circuits (BSC) Lab 12 Final Project ©2008 by the Regents of the University of California. All rights reserved. Reading: Hayes & Horowitz Pages 562-566 Horowitz & Hill Chapter 12.01-12.03, 12.06-12.07 In this last lab, you will design and build a final project of your choice. Several suggested projects are outlined, but, with the permission of the instructor, you may dream up your own project. Pre-lab questions: 1. What is your project going to do? 2. What is your project’s preliminary circuit diagram? 3. Have you ordered or acquire your parts and supplies for your final project? Your Final Project: NOTE: A less than 1 page proposal for your final project with a simple block diagram is due on or before Monday, http://socrates.berkeley.edu/~phylabs/bsc/BSCDueSp08.pdf This proposal is the only instance in this course where there should be only one sheet per lab team. But you still need to write the report separately. This time frame is for you to be able to order and purchase any needed additional parts for your final project ***Inspection of Final Projects will be on Thursday and Friday of the last week of classes between 1 PM & 5 PM and the reports are due on Monday by 3:00 PM. *** =>Every student must complete their own final lab write up.<= Turn write-ups for Final Projects into the 111-LAB GSI's or Professor (NOT THE BSC BOX) on or before the due date in room 286 LeConte Hall http://socrates.berkeley.edu/~phylabs/bsc/BSCDueSp08.pdf .  DO NOT turn write-up into the BSC Box. You must demonstrate your completed project to the Laboratory Staff. The last day to work in the laboratory is Friday. In this final lab, you will design and construct a project on your own. Several suggested projects are listed at the end of this write-up, but, with the permission of the instructor, you may undertake a different project. You need to submit, with your partner, a < 1 page project proposal, due on the date specified on the course due date schedule handout.Physics 111 BSC Laboratory Lab 12 BSC Final Project Last Revision: January 2008 Page 2 of 5 ©2008 by the Regents of the University of California. All rights reserved. General Comments: A. This lab is very different from the other labs. There may be many approaches to your goal. It is up to you to decide which approach is best. Build your project with your lab partner, and take any data together, but your report must be written by you alone. You may discuss the de-sign of your experiment with any of your classmates; however, you are not allowed to copy an-other group’s work. B. You may use any of the breadboards and components in the Physics 111 BSC Lab. All other parts should be acquired long before you need them. The stores do not stock many special parts. You may need to buy a few specialized components. Good local sources are Al Lasher’s, Radio Shack, Digikey, and Frys. Don't spend too much money; if you think you need a particularly ex-pensive component, ask the laboratory staff. You may also call the manufacturer or look on the WEB for the Free samples section of the company i.e.; Texas Instruments. If you want to keep your circuit, you will need to buy a small piece of printed circuit board (PCB) with holes for ICs and connections, on which you can solder or wire wrap your circuit together (see Horowitz & Hill, chapter 12.) Note that there is a soldering station in the Lab. C. Your report should be less than 10 text pages long plus circuit diagrams not just block diagrams. D. The report is graded on and should consist of: a) A title page with your name, your partner’s name, the date, and a short abstract (less than 100 words) summarizing your circuit and the results of any measurements. b) A one-page introduction. c) A description of your circuit: i) Start with a functional description: a block diagram listing all the major op-erations in your circuit. ii) A readable circuit diagram. iii) A description of the purpose and operation of all the major components in the circuit (most likely all the active components and some of the passive compo-nents.) Relate each major component to the appropriate function block. d) PSpice circuits, if any. e) If appropriate, a description of the theory behind your experiment. f) A description of the experiments you performed with your circuit and the measure-ments you made, including your experimental methods, your raw data (in tabular or graphical form), and data and error analysis. g) Conclusions. h) Acknowledgments. i) References. Note: Complete all of the above items and you should do well. Suggestions for building projects using LabView and electronic circuits learned: 1. For the digitally minded: Measure the acceleration of gravity with LabView as an in-terface Panel. 2. For the analog minded: Build a circuit which transmits an audio signal over a light beam and then controlled by LabView display Panel. 3. Look on the Internet for ideas about your final project, but DO NOT copy the circuits. Get ideas from them, not complete diagrams. Very little of the circuits on the Internet work properly if at all and you’ll waste your time trouble shooting these circuits. However, you will need some time to trouble shoot your circuits and program. 4. You should use LabView, ADC, DAC, and electronics you have learned in the BSC Lab. Acceleration of Gravity Use a digital timer and some phototransistor detectors to measure the acceleration due to gravity. Before beginning, make sure you thoroughly plan your experiment. Aim for an accuracy of better than 10%. If you use a ball, how far should you let it fall? If you use a timer, how accurate must it be? Light Transmitter/ReceiverPhysics 111 BSC Laboratory Lab 12 BSC Final Project Build a circuit that transmits an audio signal for a light beam. Use an LED as your light source. Detect the light signal with a phototransistor, and amplify it enough to drive a speaker. Your circuit could be designed to modulate the light from the LED at audio frequencies, but much better results can be obtained by amplitude modulating a much higher frequency carrier signal. A possible block diagram for your project is: Last Revision: January 2008 Page 3 of 5 ©2008 by the Regents of the University of California.