Lecture 1 - NYU Tandon School of...
Transcript of Lecture 1 - NYU Tandon School of...
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Lecture 1
Resistor
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What is Current?
• A flow of electrically charged particles• Carried by small negatively-charged
particles, called electrons• Represented by the symbol I, and is
measured in amperes, or 'amps', A• Most often measured in milliamps, mA• Like water flow
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Water Analogy
More current
More current
Less current
Less currentLess current
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What is Voltage?
• Potential difference• Represented by the symbol V, and is
measured in volts, V• Like potential energy at water fall
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Water Analogy
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Series Connection of Cells
• Each cell provides 1.5 V• Two cells connected one after another, in series, provide
3 V, while three cells would provide 4.5 V• Polarities matter
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Parallel Connection of Cells
• If the cells are connected in parallel, the voltage stays at 1.5 V, but now you can draw a larger current
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DC and AC
• A cell provides a steady voltage, so that current flow is always in the same direction– This is called direct current, or d.c
• The domestic mains provides a constantly changing voltage which reverses in polarity 60 times every second– This gives rise to alternating current, or a.c
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Power Supply
Digital Analog
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Water Analogy of Wires
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Resistors• Dissipative elements that convert electrical
energy into heat• Resistors limit current• Unit is ohms, Ω Resistor Symbols
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Water Analogy of Resistor
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Resistor Applications
• Resistors are used for– Limiting current– Lowering voltage (voltage divider)– As current divider– As a sensor (potentiometers, photoresistors, strain
gauge)– As pull-up or pull down elements
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Resistors of Different Sizes
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How to Read Resistor Values 1
1. By color code 2. By digital multi meter (DMM)
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How to Read Resistor Values 2By color code
Resistor value = )%(10 Ω±× tolAB C
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Resistance Color CodeNumber Color
0 black1 brown2 red3 orange
4 yellow5 green6 blue7 violet8 grey9 white
Tolerance Color
±1% brown±2% red±5% gold±10% silver
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Example
• The first band is yellow, so the first digit is 4• The second band is violet, so the second digit is 7• The third band is red, so the multiplier is • Resistor value is )%(51047 2 Ω±×
210
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Metric Units and ConversionsAbbreviation Means Multiply unit by Or
p pico .000000000001 10 -12
n nano .000000001 10 -9µ micro .000001 10 -6m milli .001 10 -3. Unit 1 10 0k kilo 1,000 10 3M mega 1,000,000 10 6G giga 1,000,000,000 10 9
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Examples
0.01
http://www.electrician.com/resist_calc/resist_calc.htm
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Digital Multimeter 1
• DMM is a measuring instrument• An ammeter measures current• A voltmeter measures the potential
difference (voltage) between two points
• An ohmmeter measures resistance• A multimeter combines these
functions, and possibly some additional ones as well, into a single instrument
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Digital Multimeter 2
• Voltmeter– Parallel connection
• Ammeter– Series connection
• Ohmmeter– Without any power supplied
• Adjust range (start from highest limit if you don’t know)
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Switched Ranging DMM Auto Ranging DMM
Digital Multimeter 3
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Ammeter Connection
• Break the circuit so that the ammeter can be connected in series• All the current flowing in the circuit must pass through the
ammeter• An ammeter must have a very LOW input impedance
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Voltmeter Connection
• The voltmeter is connected in parallel between two points of circuit
• A voltmeter should have a very HIGH input impedance
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Ohmmeter Connection
• An ohmmeter does not function with a circuit connected to a power supply
• Must take it out of the circuit altogether and test it separately
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Resistors in Series
Rtotal=R1+R2
Rtotal=1+1=2kΩ
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Resistors in Parallel
Ω==+×
=
+×
=
kR
RRRRR
total
total
5.021
1111
21
21
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Exercise 1
Ω==+×
+=
+×
+=
kR
RRRRRR
total
total
5.123
11111
32
321
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Exercise 2
10Ω
Pot
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Potentiometer 1
• Has an adjustable resistance• Rotary potentiometer• Linear potentiometer• Use as a position sensor
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Potentiometer 2
Terminal B Wiper Terminal A Terminal B Wiper Terminal A
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Rotary Potentiometers
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Linear Potentiometer
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Breadboard 1
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Breadboard 2
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How to Insert a Component into a Breadboard
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Resistor ExperimentsExperiments Chapters
What’s micro controllerBasic A and D
Process Control
Smart Sensors
Boe Bot Robotics
Others On coming slides
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Experiment Details 11. Read resistors’ nominal values using color code2. Determine resistors’ values using an Ohmmeter3. Determine resistors’ values using DMM (Voltmeter and
Ammeter) and compare with results from 1 and 24. Make serial connection with two resistors
1) Repeat 1, 2, and 3
5. Make parallel connection with two resistors1) Repeat 1, 2, and 3
6. Make combination of serial and parallel connection with three resistors
1) Repeat 1, 2, and 3
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Experiment Details 2
• Adjust and Determine the potentiometer value such that
Vin
Vout
Pot.
VinVout65
=
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Lecture 2
Mechatronics
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Mechatronics 1• Synergistic integration of
– Mechanical engineering– Control theory– Computer science– Electronics
• To manage complexity, uncertainty, and communication in engineered systems
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Mechatronics 2• Typical knowledgebase for optimal design and
operation of mechatronic systems comprises of– Dynamic system modeling and analysis– Decision and control theory– Sensors and signal conditioning– Actuators and power electronics– Hardware interfacing– Rapid control prototyping– Embedded computing
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Mechatronic Applications• Smart consumer products: home security, camera,
microwave oven, toaster, dish washer, laundry washer-dryer, climate control units, etc.
• Medical: implant-devices, assisted surgery, haptic, etc.• Defense: unmanned air, ground, and underwater vehicles,
smart munitions, jet engines, etc.• Manufacturing: robotics, machines, processes, etc.• Automotive: climate control, antilock brake, active
suspension, cruise control, air bags, engine management, safety, etc.
• Network-centric, distributed systems: distributed robotics, tele-robotics, intelligent highways, etc.
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Roborat 1
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Roborat 2
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Roborat 3
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Robocockroach
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Key Elements of Mechatronics
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Elements of Mechatronics 1• Mechanical elements
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• Electromechanical elements
Elements of Mechatronics 2
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Elements of Mechatronics 3
• Electrical/Electronic elements
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Elements of Mechatronics 4• Control interface/computing
hardware elements
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Elements of Mechatronics 4
• Computer elements
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Microprocessors• Perform arithmetic, logic, communication,
an control function• Arithmetic/logic unit(ALU)• Instruction registers and decoders• Data registers• Control unit• Intel 4004 (4bit microprocessor),
Intel 8080 (8bit microprocessor)
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Microcontrollers • Special purpose miniaturized computers• Single integrated circuit containing many
specialized and sophisticated circuits and functions
• Two primary components– RAM– CPU with instruction set
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Microcontroller Architecture
CPU RAM ROM, EPROM, or EEPROM
Digital I/O Serial communication
timers
A/D D/A
SwitchesOn-off sensors
External A/D or D/ADigital displaysOn-off actuators
External EEPROMOther
microcontrollersHost computer
Analog sensors
Potentiometers
Monitored voltage
Analog actuatorsAmplifiers
Analog diplays
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PIC Microcontrollers• PIC 16C57 (unit price: $7.50 in single quantities,
$3.50 in quantities of 1000 or more)
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Basic Stamp 2
http://www.parallax.com/Downloads/Documentation/bs/mod/BASIC_Stamp_2_Schematic_Rev_F.pdf
–Simple and easy to use–PIC-based PBASIC interpreter on ROM
–16 digital I/OPIC 16C57
2kbyte EEPROM
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Stamp Development Board
Board of education
5V Voltage regulator
DB9 connector
Breadboard
Servomotor connector
Caution!!
Capacitors
Reset button
BS2 socket
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Hardware Considerations• Power requirements
– BS2 requires regulated 5DCV and draws about 8mA• Each I/O pin of BS2 can
– Source up to 20mA– Sink up to 25 mA
• When the voltage regulator on BOE is being used, all I/O pin as a group can– Source up to 40mA– Sink up to 50mA
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BS2 Pin DescriptionsPin Name Description1 SOUT Serial out2 SIN Serial in3 ATN Attention4 VSS System ground
5-20 P0-P15 Input/Output pins21 VDD 5DC V22 RES Reset23 VSS System ground24 VIN Unregulated power in
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BS2 Variable TypesVar type Size Range of value
bit 1 bit 0, 1nib 4 bits 0-15byte 8 bits 0-255word 16 bits 0-65535
OnOff var bit
InOutPins var nib
ADCin var byte
Count var word
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Binary, Decimal, and Hexadecimal Numbers
Binary Decimal Hexadecimal0000 0 00001 1 10010 2 20011 3 30100 4 40101 5 50110 6 60111 7 7
Binary Decimal Hexadecimal1000 8 81001 9 91010 10 A1011 11 B1100 12 C1101 13 D1110 14 E1111 15 F
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Variable Commandb0=10
b0= %00001010
b0=$0A
Result is 119
(375)2 is 00000001 01110111
b3 var byte
b3=375
Debug DEC b3
01110111 = 27(0)+26(1)+25(1)+24(1)
+23(0)+22(1)+21(1)+20(1)
= 119
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Assigning Pins for I/ODIRS: 1 for output, 0 for input
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0DIR D DIR C DIR B DIR A
DIR H DIR L
OUTS
Same as for INS
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0OUT D OUT C OUT B OUT A
OUT H OUT L
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How to Protect the I/O Pins
mAI 192705
≈=Vdd
BS2
Vss
270Ω
270ΩP0
P1
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Variables ExperimentsExperiments Chapters
What’s micro controllerBasic A and D
Process Control
Smart Sensors
Boe Bot Robotics
Others On coming slides
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Experiment Details 1
myCon CON 10
myVar1 VAR Byte
myVar2 VAR Byte
myVar3 VAR word
myVar4 VAR word
myVar1=5
myVar2=25
myVar3=375
myVar4=400
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Experiment Details 2
debug "myCon= ", DEC myCon, cr
debug "myVar1= ", DEC myVar1, cr
debug "myVar2= ", DEC myVar2, cr
debug "myVar3= ", DEC myVar3, cr
debug "myVar4= ", DEC myVar4, cr
debug "myVar3 in BIN= ", BIN myVar3, cr
debug "Low byte of 375=", BIN myVar3.byte0, cr
debug "High byte of 375=", BIN myVar3.byte1, cr
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Experiment Details 3
b0=10
debug "b0 input in DEC.", cr
debug "b0 in DEC= ", DEC b0, cr
debug "b0 in BIN= ", BIN b0, cr
debug "b0 in HEX= ", HEX b0, cr
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Experiment Details 4
b0=%00001010
debug "b0 input in BIN.", cr
debug "b0 in DEC= ", DEC b0, cr
debug "b0 in BIN= ", BIN b0, cr
debug "b0 in HEX= ", HEX b0, cr
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Experiment Details 5
b0=$0A
debug "b0 input in HEX.", cr
debug "b0 in DEC= ", DEC b0, cr
debug "b0 in BIN= ", BIN b0, cr
debug "b0 in HEX= ", HEX b0, cr
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Experiment Details 6b0=10
b1=20
b2=b0+b1
b3=375
debug "b0 in DEC= ", DEC b0, cr
debug "b1 in DEC= ", DEC b1, cr
debug "b2 in DEC= ", DEC b2, cr
debug "b3 in DEC= ", DEC b3, cr
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Experiment Details 7
debug "b0 in BIN= ", BIN b0, cr
debug "b1 in BIN= ", BIN b1, cr
debug "b2 in BIN= ", BIN b2, cr
debug "b3 in BIN= ", BIN b3, cr
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Experiment Details 8
w2=375
debug "w2 in DEC= ", DEC w2, cr
debug "w2 in BIN= ", BIN w2, cr
debug "b4 in BIN= ", BIN b4, cr
debug "b5 in BIN= ", BIN b5, cr
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Experiment Details 9
•Please read “BASIC Stamp Frequently Asked Questions ”
•Please read and run all programs on “BASIC Stamp Syntax and Reference Manual ” from page 1 to page 75
•And DEBUG on page 159