Electronics Design Laboratory Lecture #1, Fall 2014 Dr. Daniel Seltzer Teaching Assistants: Fenglong Lu & Ali Sepahvand Electronics Design Laboratory 1
Daniel Seltzer seltzer@colorado.edu Fenglong Lu Fenglong.Lu@colorado.edu Ali Sepahvand Alihossein.Sepahvand@colorado.edu Prerequisites and Co-requisites Prerequisite: ECEN2250 Intro to Circuits & Electronics Co-requisite: ECEN2260 Circuits as Systems Meeting times Lectures: Monday 3-3:50pm ECCR135 Lab Section 021: 10:30-12:20 TTh ECEE 281 Lab Section 022: 10:30-12:20 TTh ECEE 282 Note: attendance in the lab is required to receive any lab credit Electronics Design Laboratory 2
Course Overview Wireless Transmitter Circuit Motor Driver Circuit Wireless Receiver Circuit Robot Control Circuit Motor Driver Circuit Electric Motor Electric Motor Lab 1: Lab equipment, circuit prototyping, de-bugging and simulations Lab 2: Speed sensor & Robot DC motor characterization Lab 3: Motor drive and speed control circuits Lab 4: Microcontroller based speed and position control Lab 5: Robot remote control Lab 6: Final Project Electronics Design Laboratory 3
Overall lab goals Laboratory skills and competence Proficiency in use of laboratory equipment Ability to read, understand, and create circuit diagrams Experience in design, testing and debugging electronic circuits, working with discrete and IC components Simulation, analysis and design tools Spice simulation as a design verification and debugging tool MATLAB analysis of data Application of core electrical engineering theory Time-domain response: 1 st and 2 nd order, distortion Frequency-domain response: bode plots, filters Active components, nonlinearity: op-amps, diodes, BJTs, MOSFETs Feedback and control Electronics Design Laboratory 4
Organization Teams Teams of 2 Students + 1 Robot Begin working in teams tomorrow (select partner today!) Purchasing kits Purchase kit per team: component kit: $160; tools kit: $70 (prices shown are approximate, please check with the EE store ECEE 1B10) Purchase at the EE Store, ECEE 1B10, before lab tomorrow EE Store hours: 9am 4pm, M-F Lab computer access ECES student server: http://eces.colorado.edu Check with EE office about card access if you don t have it yet D2L: https://learn.colorado.edu/ Turn in lab reports and monitor grades Not up yet, but will be before first deadline Electronics Design Laboratory 5
Grading In-class quizzes [individual] Pre-lab assignments [individual] Labs 1-5 Demonstrations [group and individual] Reports [group] Final project Proposal slides and presentation [group] Proposal [group] Expo [group and individual] Report [group] Lab attendance and performance Electronics Design Laboratory 6
Electronics Design Laboratory Lab 1 Part A Electronics Design Laboratory 7
Objectives Lab 1: Introduction Develop laboratory and circuit design skills and techniques, perform simulations, prototyping, testing and debugging Part A: Laboratory equipment Become familiar with electronic laboratory equipment Part B: Reverse engineering lab: circuit schematics and prototypes Gain experience working with electronic components, circuit schematics, prototyping boards, and simulation Lab procedures: posted on the course website Electronics Design Laboratory 8
Lab 1, Part A: Laboratory Objective Equipment Become familiar with electronic laboratory equipment Equipment Multimeter, power supply, waveform generator, and oscilloscope Task overview 1. Configure power supply and multimeter to power a basic circuit and measure resistances, voltages, and currents 2. Configure waveform generator and oscilloscope to capture specified waveforms and pulse signals Electronics Design Laboratory 9
Triple output DC supply all outputs 0V 6V, 5A Store and Recall functions to 0V +25V, 1A save and re-use lab settings 0V -25V, 1A Select voltage and current limits for each output (Display Limit) Output On/Off: one enable for Electronics Design Laboratory 10
Multimeter measures current, voltage and resistance Separate front terminals for current, voltage, and resistance measurements 3 A fuse for current measurements Panel buttons select measurement type and range settings 2-Wire (2W) and 4-Wire (4W) resistance measurement options Additional two terminals used for 4-wire measurement to cancel effects of voltage drop in wires Electronics Design Laboratory 11
Waveform Generator Generates Sine, Square, Ramp, and Pulse waveforms and arbitrary waveforms (user or pre-defined) Menus used to select waveform and settings (frequency, amplitude, offset, duty, etc.) Channel and output buttons used to enable/disable output and set trigger source for starting output Output modeled as a voltage source with a series resistance, or impedance of 50 Ohms Menu used to select Load impedance so the displayed voltage matches the expected output Max output: +/- 10V into High Z load (+/- 5V into 50 Ohm load) Electronics Design Laboratory 12
Oscilloscope Displays time-domain waveforms of the signals for each of the four channels Documentation exists on the Agilent Technologies website Use it! Electronics Design Laboratory 13
Displays time-domain waveforms of the signals for each of the four channels Four input channels allows four signals to be viewed 1 MΩ, 10 pf input impedance Select vertical (voltage) and horizontal (time) axis resolution Each channel can have a different vertical scale Trigger Auto: captures waveform immediately Normal: captures based on trigger level Single trigger captures and displays a single sampling of the waveform Acquisition modes Normal: continuously displays captures Average: averages selected number of captures, then displays the average Peak Detect: holds peak values to detect narrow excursions Display settings directly impact vertical and horizontal resolution 8-bit vertical resolution (of full scale) 1 ns sampling to internal memory with only 10 kpts / ch For longer time settings, points are dropped (decimated) and interpolated Electronics Design Laboratory 14
Displays time-domain waveforms of the signals for each of the four channels Four input channels allows four signals to be viewed 1 MΩ, 10 pf input impedance Select vertical (voltage) and horizontal (time) axis resolution Each channel can have a different vertical scale Trigger Auto: captures waveform immediately Normal: captures based on trigger level Single trigger captures and displays a single sampling of the waveform Acquisition modes Normal: continuously displays captures Average: averages selected number of captures, then displays the average Peak Detect: holds peak values to detect narrow excursions Display settings directly impact vertical and horizontal resolution 8-bit vertical resolution (of full scale) 1 ns sampling to internal memory with only 10 kpts / ch For longer time settings, points are dropped (decimated) and interpolated Electronics Design Laboratory 15
What to do next By tomorrow (1 st lab period) Find team partner Purchase component and tools kits (if you do not have one) Browse through lab website: ecee.colorado.edu/~ecen2270 Read Lecture 1 slides on the lab website Read through Experiment 1 Part A slides and Lab report guidelines Complete Experiment 1 Part A pre-lab By next week (3 rd lab period) Read through Lecture 2 slides on the lab website Read through Experiment 1 Part B slides and Lab report guidelines Complete Experiment 1 Part B pre-lab Electronics Design Laboratory 16