ECE321322 Electronics I & Lab Spring 2015 1 Final P.docx
- 1. ECE321/322 Electronics I & Lab Spring 2015 1 Final Project – Demo. Review Form Student name: Item Comments Grade Simulation verification Are the transformer and overall power supply working /10 Are the pre/main amplifiers work? /10 Final breadboard setup and test Power supply works?
- 2. /10 Is Preamp design approach correct and the board working? /10 Is main amplifier design correct and working? /10 Lab skills Proficient with lab equipment and testing? /10 Overall grade /60 ECE321/322 Electronics I & Lab Spring 2015 1 Final Project – Report Review Form
- 3. Student name: Item Comments Grade Project report Report format as specified? /10 Technical discussion with simulation and measurement data? (Ability to analyze and design complex electrical and electronic devices) /10 Did theory cover sufficient details to compare and justify experimental data? (Knowledge and ability to apply
- 4. mathematics) /10 Appendix: Pspice source files and other info (e.g., data sheet)? /10 Overall grade /40 1 ECE 321 Final Project This project is for individual student and is NOT a team project. HOWEVER, collaboration among team members (i.e., ECE322 team) is strongly encouraged and should be properly acknowledged in the final project report. Final Project Report Due: May 4, 2015 to be uploaded onto
- 5. Evaltools Project Demo: Tues., 5/5/15, 1:30 - 3:30 For TTH Classes that meet at 3:00 pm (ECE 322_01) Wed., 5/6/15, 1:30 - 3:30 For MWF Classes that meet at 3:00 pm (ECE 322_02) Objective 1. To design an “analog computer” to fulfill the following requirement Vout = 25*(A*V1in + B*V2in) where V1in = V2in = 10 mVpp @ 1 kHz, is the input sinusoidal (sine) signal to the analog computer, which can be generated from a function generator; Vout is the output of the computer; and A is a constant of your birth month mod 10 (divide by 10 and take the remainder) and B is a constant of your birth day mod 10 (divide by 10 and take the remainder).
- 6. e.g., If your birthday is November 7, A = 11 mod 10 = 1 and B = 7 mod 10 = 7. If your birthday is February 26, A = 2 mod 10 = 2 and B = 26 mod 10 = 6. 2. To verify the circuit design with the help of contemporary software 3. To build and test the final design on breadboard Instructions and Related Information Figure 1 shows an illustrative block diagram of the analog computer. Figure 1. Block diagram of an “analog computer” 2
- 7. DC dual-polarity power supply: 1. It should be able to provide a stable ±12V dc power. 2. 7812 and 7912 voltage regulators are available (datasheets are available at AllUser U:ECE Component Library on lab workstations). If you are using your own laptop, you need to type ECEVaultAllUserECE Component Library. 3. Refer to the figure below (read Chapter 17 of your textbook): Pre-amplifier:
- 8. 1. Pre-amplify the input signal by a value of AV = 40. 2. Realize this pre-amplifier using an OP amp. Main amplifier (Op-Amp): 1. Implement the summing and multiplying operations 2. LM741 general purpose op-amplifiers are available. 3. Refer to Chapter 13.2 of your textbook on summing amplifiers Input: Vin = 10 mVpp @ 1 kHz Other available components: Resistors, capacitors, diodes file://ECEVault/AllUser/ECE%20Component%20Library file://ECEVault/AllUser/ECE%20Component%20Library 3 Procedure 1. Design the circuits block by block. Determine the values of
- 9. the resistors and capacitors in the circuits based on the overall design requirement and the local operation requirement (dc bias, voltage gain, input and output impedance, dc and ac equivalent circuit, etc.). 2. Simulate your design with PSpice software. Record corresponding waveforms and values. Verify your design and if needed redesign or modify your design. 3. Setup your design on the breadboard block by block. Test each subsystem and then integrate all subsystems. Record corresponding waveforms and measurements. Hint: 1. Understand how breadboards get connected underneath. The bigger breadboard is disconnected half way through the vertical panel. Remember to use jumper wires to make the entire breadboard a unit. 2. Color-code your breadboard setup. For example: red for +12V, white for -12V, black for ground, yellow for input and output signals, green and blue for local
- 10. network. 3. Be aware that the packages for the 7812 and 7912 are different. Pay attention to their spec sheets. 4. Test your circuit block by block. Set up the DC power supply, pre-amp, and summer/multiplier at separate locations. Make sure each block works fine when activated individually. Save input and output waveforms for each individual block. Finally connect them together. 5. If the function generator cannot provide a stable Vin = 10 mVpp @ 1 kHz, try to increase the signal magnitude (For example to 500 mVpp) in order to get a stable signal. Then use a voltage divider to get the low magnitude input signal you need. 6. If the DC power supply you have designed has high frequency noise (up to 1 MHz), try to fix it by adding proper filter capacitors. In order to speed up your test, you can use the standard DC power supply to power the rest of your circuit. 7. Ask another group member to double-check your circuit before turning the power on. Usually it is impossible to get the circuit right the first time.
- 11. 8. Remember to turn off the power before you rewire the circuit, plug in or pull out components. The Deliverables 1. PSpice source files in one zip file for your final circuit design and simulation verification results (i.e., plots). 2. Final breadboard setup and test (lab demo). 3. Final Project Report. 4 Final Project Report Refer to the Formal Report guidelines (from ECE 322 Electronics I Lab). Under the guidelines, it should include the following: 1. Title Sheet
- 12. 2. Abstract 3. Acknowledgements 4. Table of Contents 5. List of Tables 6. List of Illustrations 7. Introduction (including the objective(s) of the project) 8. Theory 9. Experimental Apparatus 10. Experimental Results and Discussion (Include both breadboard test and simulation results from each individual blocks as well as the overall design) 11. Conclusion 12. List of References or Bibliography 13. Appendices Grading policy of the final project The final project will be graded based on
- 13. PSpice design and simulation 20% Breadboard design and measurement 30% Final project report 40% Project demo (and familiarity with equipment) 10%