day 02 - icfl make it at the librarylibraries.idaho.gov/files/electronics-workshop2015.pdfday 02 -...
TRANSCRIPT
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Overview
• Day 1 Electronics and Breadboarding Lunch Arduino Basic Projects
• Day 2 Arduino intermediate Projects Lunch Wearable’s and E-textiles
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Workshop Files
• Please copy files form one of the flash drives, they will have Fritizing files and Arduinosketches.
• Also, additional software and libraries to install for Day 03
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Workshop Format
• Workshop presenters– Nick Raymond– Adam Day
• Hands on workshop– Build the circuits– There will be problems– Ask us for help, thanks why we are here!
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About myself…• Nick Raymond – Maker Media – [email protected]
• BS Mechanical Engineering (UD Davis)• MS Student – emphasis in manufacturing and
mechatronics• Hobbies
– Beer brewing– Surfing– 3D Printing– CNC machines– Wood working– Electronics/Arduino
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About myself…
• Ocean powered wave energy converter – 2012/2013
• Open source Ocean Wave Buoy Project - ongoing
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Electrical Component Symbols• Resistors
• Capacitors
• Inductors
• Diodes
• Transistor
• Voltage source
Transistor
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Electrical components
• Potentiometers
• Light Emitting Diode (LED)
• Motor
• Battery
• Speaker
M
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Voltage – Current - Resistance
Image: Sparkfun.com
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Current vs. Voltage
Source: http://www.diffen.com/difference/Current_vs_Voltage
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Ohm’s Law
Source: http://www.electronics-tutorials.ws/dccircuits/dcp_2.html
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Breadboard LayoutPower Rails
Terminal Rails
DIP Channel
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Breadboard “Insides”
Images – sparkfun.com
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Breadboards
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Basic LED + Switch circuit
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Build the Circuit
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Step 1
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Step 2
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Step 3
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Step 4
Cathodeshort leg (-)
Place the long leg of the LED in the +V rail near row 17, place the short leg in F17.
Anodelong leg (+)
column F
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Step 5
Place the one leg of 330 ohm resistor into H17(orange, orange, brown, gold)
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Step 6
Turn on the switch!
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Remove the resistor…
Creates a break in the circuit, electrons cannot flow and LED turns off.
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555 Timer IC
Indicator mark
“Integrated Circuit” = IC and “Dual Inline Package” = DIP
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555 Timer ICAstable – no stable state- Switches between high and low, operates as an oscillator- Used for motor control, flashing lamps and LED, or as a clock
Monostable – one stable state- One shot pulse of fixed length in response to input signal-Ideal for “push to start” projects that will move then turn off after certain time.
Bistable – two stable states, high and low-taking trigger input high makes output low,- taking trigger input low makes output highswitches between two stable states based on the state of the inputs, great for ON/OFF switch
Source: http://www.555-timer-circuits.com/operating-modes.html
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Project 2 - Materials22 AWG wire
9V Battery
Breadboard
Alligator clips (x4)
0.01 uF Cap.
330 Ω resistor555 IC
4.7MΩ resistor (x2)
LED
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Project 02 - Schematic
“Bistable” Mode4.7M ohm
4.7M ohm
0.01 uF(103)
Source: www.bareconductive.com
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Paint the touch sensors
www.bareconductive.com
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Paint the touch sensors
Conductive Ink Pen Conductive Ink Pots + Brush
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Step 1
Insert the positive and negative battery wires into the power rails.Use two more wires to jump power to the opposite side of the board.
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Step 2
Dimple
Place the 555 timer in the middle of the breadboard.
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Step 3
Connect Leg#1 to GND, connect Leg#4 to +V, connect Leg#8 to +V.
8
14
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Step 4
Jump a 330 ohm resistor from Leg#3 to the long leg of the LED. Then connect the short leg of LED to GND
3
`
`
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Step 5
5
` ` ` ` ` ` ` ` ` ```````````````
Jump 0.01 uf capacitor (103) from Leg#5 to GND.
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Step 6
` ` ` ` ` ` ` ` ` `````````````
` ` ` ` ` ` ` ` ````````````` ` ``
````
`̀```
6
2
Jump 4.7M ohm resistor from Leg#2 to +V,Jump 4.7M ohm resistor from Leg#6 to GND
4.7M ohm = yellow, purple, green, gold.
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Step 7
Place a yellow alligator clip on Leg#2 row, and another on GNDPlace a blue alligator clip on Leg#6 row, and another on +V rail.`
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Attach Conductive Sensors
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Turn the LED ON/OFF
ON OFF
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Turn the LED ON/OFF
ON OFF
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Other Ideas
• You can make your own touch sensors
• Draw different contact pads
• Use the conductive paint to make more complicated patterns and circuits
• OR use the same circuit but instead of conductive paint you can use cardboard and aluminum foil to make a pressure sensor
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Questions?
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Project 03 – Materials
22 AWG wire
9V Battery
Breadboard
0.01 uF Cap.
555 IC
Speaker
100 uF Cap.
1k ohm
10k ohm Potentiometer
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Project 03 - Schematic
100 uFcapacitor
0.01 uFcapacitor
1k ohm resistor
10k ohm potentiometer
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Step 1
Add +V and GND wires to power rails, and add jumpers across.
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Step 2
Add 555 timer to the middle of the board, dimple facing LEFT.
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Step 3
Jump Leg#1 to GND, jump Leg#4 to +V, jump Leg#8 to +V.
8
14
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Step 4
Use a short yellow wire, jump from Leg#2 to Leg#6.Jump a 1k ohm resistor from Leg#7 to +V. (brown, black, red, gold)
2
67
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Step 5
6
Place long leg of large capacitor, 100 uf, into Leg#3.Add a small capacitor, 0.01 uf (103), from Leg#6 to GND.
3
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Step 6
Add the speaker, one wire from speaker to short leg of 100 uf cap,Add the second wire to GND. Note: Speakers not polarized.
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Step 7
Add the 10k ohm potentiometer to the breadboard, top left.
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Step 8
Jump left leg of pot to GND, right leg of pot to Leg#2,Middle leg of pot to Leg#7. Then turn on battery switch!
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Astable mode - How it works
As we rotate the potentiometer, we change the input resistance.This change in resistance controls frequency of the output pulses.
Short pulses lead to higher frequency noise from the speaker.
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Questions?
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LUNCH
Note: If you do not have the Arduino IDE installed, please install during lunch. If you need help, let us know!
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Workshop 1 - Outline
• What is Arduino? (hardware and software)• Types of Arduino microcontrollers• Arduino UNO Specifications• Integrated Programming Environment - IDE• Programming basics
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Types of ArduinosUno - $25 Mega 2560 - $46
Leonardo - $25DUE - $50
Pro Mini - $10
Arduino Mini - $20
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Arduino AlternativesTi Launch Pad MSP430
Picaxe 28X2 Shield Base Parallax Propeller ASC+
NetDuino Plus 2
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Build your own Arduino
Adafruit MENTA -$35 Makershed MintDuino -$25
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Going WirelessArduino YUN Pinoccio
BLEduino Geogram One
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Single Board Computers & FPGABeagleBone Black Raspberry Pi
MojoPapilio One
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Arduino UNO Pin Layout
Reset Digital I/O pins
Analog pinsPower and GND
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Types of chips: SMD vs. DIP
Dual in-line package Surface mount device
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Arduino IDE
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Programming EnvironmentIDE version
serial port connection
file name
IDE features
code goeshere
type of Arduino
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Arduino IDE Interface
new open save
uploadverify serial monitor
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Questions?
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Project 4 – Blink
Place yellow wire in Pin 5, NOT Pin 13(this image is incorrect)
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File> Example> 01.Basics> Blink
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Sketch layout• Add libraries, write comments, and declare variables
– Very first thing, add reference to library files– Set constants, define variables– Important, if you define a variable within a loop, it cannot be used outside of
that loop• void setup()
– Declare pinmodes, set the pins for inputs and outputs– Setup serial monitor for communication
• void loop()– Runs your code– Starts at the top, ends at the bottom, then repeats– This is where you read sensors, compute values and control the outputs– The more stuff in the void loop, the longer it takes to cycle through the loop
and get back to the start• Define functions
– Define functions to be used in the program (can also be at beginning).
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Blink Sketch
Write comments
void setup()
void loop ()
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Edit the Blink sketch
• The standard sketch uses Pin 13.• At the factory, each Uno is tested with this
sketch to make sure it works properly.• An onboard LED will blink once you connect
the USB cable.• To test our circuit, we need to change every
instance of 13 to 5 so the Arduino knows we plugged the LED into a Pin 5.
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Edit the Blink Sketch
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Tools > Board > Arduino UNO
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Tools > Port > usbmodem###
Note: Arduino must be connected to computer
with USB cable.
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Upload
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The LED should Blink!• If not, check the wiring to Pin 5• Then check the code• If you get an error message, make sure you
change the port and board settings.
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Now, make the code more flexible
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But, how can we control the brightness of the LED?
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Digital vs. Analog Outputs
• Digital – either ON or OFF– Binary, we use either 0 or 1, HIGH or LOW
• 0 = false (off)• 1 = true (on)
• Analog – range of values– Hardware >>> analog to digital convertor (A/D)– Reads digital signal, discretizes it into range of values– UNO has 10 bit A/D, so values range 0-1023 (note: 210 =1023)
– Arduino can both read and send analog signals*
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PWM with analogWrite()
analogWrite() from scale 0-255
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Arduino PWM
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File> Example> Basic> Fade
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File> Example> Basic> Fade
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Questions?
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Outputs - RGB LED
Red
GreenBlue
+V
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Types of RGB LED
Common Anode
+V
GND GND GND
Common Cathode
+V +V +V
GND
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Standard RGB LED Colors
• Red• Green• Blue• Red + Green• Red + blue• Green + Blue• Red + Green + Blue
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Project 5 – Color Changing RGB LED
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Project 5 – Color Changing RGB LED
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Sketch Layout
Define variables
void setup()
void loop()
Function definition
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Project_05_RGB_LED
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Project_05_RGB_LED
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• Plug in the Arduino, upload the code and the RGB LED should start to change colors.
• If not, check the wiring and double check the value of the resistors.
• They should be 330 ohm (orange, orange, brown, gold)
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Questions?
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Resistive Sensors
• NTCT Thermistor - NTC-type thermistors decrease in resistance as temperature rises.• Photoresistor – When exposed to more light, the resistance goes down. • Force Sensitive Resistor – Resistance decrease when force is applied.
Cds Photoresistor
Force Sensitive ResistorNTC Thermistor
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Voltage Divider
• Arduino does not have a resistance meter,
• Must convert change in resistance into chance in voltage.
• Read with A/D.
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Force Sensitive Resistors
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Build the Circuit
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Step 1
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Step 2
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Step 3
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Step 4
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Project 6 – Force Sensitive Resistor
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Project 6 – Force Sensitive Resistor
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Sensor Readings
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Project 06 - Squeeze Gauge
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Project 06 – Squeeze Gauge
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Questions?
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Inputs and Outputs
Outputs(LEDs, motor,
speaker)
Logic, make decisions,
change variables…
Inputs(digital and
analog sensors)
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Build the Circuit
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Project 7 – AnalogInput
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Project 7 – AnalogInput Code
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Project 7 – AnalogInput Code
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Questions?