electronics design laboratory lecture #1, fall 2013

Electronics Design Laboratory Lecture #1, Fall 2014

Dr. Daniel Seltzer Teaching Assistants: Fenglong Lu & Ali Sepahvand

ECEN 2270 1 Electronics Design Laboratory

Daniel Seltzer [email protected]

Fenglong Lu

[email protected]

Ali Sepahvand [email protected]

Daniel Seltzer [email protected]

Fenglong Lu

[email protected]

Ali Sepahvand [email protected]

Electronics Design Laboratory 2 ECEN 2270

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

Course Overview

• 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


Wireless Receiver Circuit

Robot Control Circuit

Motor Driver Circuit

Electric Motor Electric Motor

Wireless Transmitter

Circuit

Motor Driver Circuit

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: 1st and 2nd order, distortion

– Frequency-domain response: bode plots, filters

– Active components, nonlinearity: op-amps, diodes, BJTs, MOSFETs

– Feedback and control


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


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 Lab 1 Part A

ECEN 2270 7 Electronics Design Laboratory

Lab 1: Introduction • Objectives

– 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


Lab 1, Part A: Laboratory Equipment

• Objective – 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



• Triple output DC supply – 0V – 6V, 5A – 0V – +25V, 1A – 0V – -25V, 1A

• Select voltage and current limits for each output (Display Limit)

• Output On/Off: one enable for

all outputs • Store and Recall functions to

save and re-use lab settings


• 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

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)


Oscilloscope


Displays time-domain waveforms of the signals for each of the four channels

Documentation exists on the Agilent Technologies website… Use it!



• 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

What to do next • By tomorrow (1st 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 (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


electronics design laboratory lecture #1, fall 2013

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