Electronics Design Laboratory
Lecture #1, Fall 2014
Dr. Daniel Seltzer
Teaching Assistants: Fenglong Lu & Ali Sepahvand
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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
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Course Overview
Motor
Driver
Circuit
Wireless
Transmitter
Circuit
Wireless
Receiver
Circuit
Electric Motor
•
•
•
•
•
•
Robot
Control
Circuit
Motor
Driver
Circuit
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
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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
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Time-domain response: 1st and 2nd order, distortion
Frequency-domain response: bode plots, filters
Active components, nonlinearity: op-amps, diodes, BJTs, MOSFETs
Feedback and control
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• Teams
Organization
– 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
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Grading
• In-class quizzes [individual]
• Pre-lab assignments [individual]
• Labs 1-5
– Demonstrations [group and individual]
– Reports [group]
• Final project
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Proposal slides and presentation [group]
Proposal [group]
Expo [group and individual]
Report [group]
• Lab attendance and performance
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Electronics Design Laboratory
Lab 1 Part A
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• 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
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Lab 1, Part A: Laboratory
Equipment
• Objective
– Become familiar with electronic
laboratory equipment
• Equipment
– Multimeter, power supply, waveform
generator, and oscilloscope
• Task overview
1.
2.
ECEN 2270
Configure power supply and
multimeter to power a basic circuit
and measure resistances, voltages,
and currents
Configure waveform generator and
oscilloscope to capture specified
waveforms and pulse signals
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• Triple output DC supply
– 0V – 6V, 5A
– 0V – +25V, 1A
– 0V – -25V, 1A
all outputs
• Store and Recall functions to
save and re-use lab settings
• Select voltage and current limits
for each output (Display Limit)
• Output On/Off: one enable for
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•
•
Multimeter measures current, voltage •
and resistance
Separate front terminals for current,
voltage, and resistance measurements
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•
3 A fuse for current measurements
2-Wire (2W) and 4-Wire (4W)
resistance measurement options
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Additional two terminals used for 4-wire
measurement to cancel effects of voltage
drop in wires
Panel buttons select measurement
type and range settings
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Waveform Generator
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•
•
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
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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)
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Oscilloscope
Displays time-domain
waveforms of the
signals for each of the
four channels
Documentation exists
on the Agilent
Technologies website…
Use it!
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Displays time-domain
waveforms of the
signals for each of the
four channels
•
Four input channels allows four signals to be viewed
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•
Trigger
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•
1 MΩ, 10 pF input impedance
Select vertical (voltage) and horizontal (time) axis resolution
Each channel can have a different vertical scale
•
Auto: captures waveform immediately
Normal: captures based on trigger level
Single trigger captures and displays a single sampling of the waveform
ECEN 2270
Acquisition modes
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–
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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
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Displays time-domain
waveforms of the
signals for each of the
four channels
•
Four input channels allows four signals to be viewed
–
–
–
•
Trigger
–
–
–
•
1 MΩ, 10 pF input impedance
Select vertical (voltage) and horizontal (time) axis resolution
Each channel can have a different vertical scale
•
Auto: captures waveform immediately
Normal: captures based on trigger level
Single trigger captures and displays a single sampling of the waveform
ECEN 2270
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
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What to do next
• By tomorrow (1st lab period)
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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 (3rd 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
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