🗊Презентация Simple Digital and Analog Inputs

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Simple Digital and Analog Inputs, слайд №1Simple Digital and Analog Inputs, слайд №2Simple Digital and Analog Inputs, слайд №3Simple Digital and Analog Inputs, слайд №4Simple Digital and Analog Inputs, слайд №5Simple Digital and Analog Inputs, слайд №6Simple Digital and Analog Inputs, слайд №7Simple Digital and Analog Inputs, слайд №8Simple Digital and Analog Inputs, слайд №9Simple Digital and Analog Inputs, слайд №10Simple Digital and Analog Inputs, слайд №11Simple Digital and Analog Inputs, слайд №12Simple Digital and Analog Inputs, слайд №13Simple Digital and Analog Inputs, слайд №14Simple Digital and Analog Inputs, слайд №15Simple Digital and Analog Inputs, слайд №16Simple Digital and Analog Inputs, слайд №17Simple Digital and Analog Inputs, слайд №18Simple Digital and Analog Inputs, слайд №19Simple Digital and Analog Inputs, слайд №20Simple Digital and Analog Inputs, слайд №21Simple Digital and Analog Inputs, слайд №22Simple Digital and Analog Inputs, слайд №23Simple Digital and Analog Inputs, слайд №24Simple Digital and Analog Inputs, слайд №25Simple Digital and Analog Inputs, слайд №26Simple Digital and Analog Inputs, слайд №27Simple Digital and Analog Inputs, слайд №28Simple Digital and Analog Inputs, слайд №29Simple Digital and Analog Inputs, слайд №30
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IMPLEMENTING IOE Assist. Prof. Rassim Suliyev - SDU 2017
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IMPLEMENTING IOE Assist. Prof. Rassim Suliyev - SDU 2017

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Simple Digital and Analog Inputs The Arduino’s ability to sense digital and analog inputs allows it to respond to you and to the world around you
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Simple Digital and Analog Inputs The Arduino’s ability to sense digital and analog inputs allows it to respond to you and to the world around you

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Simple Digital and Analog Inputs digitalRead(pin) - tells your sketch if a voltage on a pin is HIGH (5 volts) or LOW (0 volts) pinMode(pin, INPUT) – configure pin as an INPUT 14 digital pins (numbered 0 to 13) Pins 0 and 1 (marked RX and TX) are used for the USB serial connection Need more? Analog pins 0 through 5 can be used as digital pins 14 through 19
Описание слайда:
Simple Digital and Analog Inputs digitalRead(pin) - tells your sketch if a voltage on a pin is HIGH (5 volts) or LOW (0 volts) pinMode(pin, INPUT) – configure pin as an INPUT 14 digital pins (numbered 0 to 13) Pins 0 and 1 (marked RX and TX) are used for the USB serial connection Need more? Analog pins 0 through 5 can be used as digital pins 14 through 19

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Simple Digital and Analog Inputs Still need more? Analog pins 0 through 15 are digital pin numbers 54 through 69
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Simple Digital and Analog Inputs Still need more? Analog pins 0 through 15 are digital pin numbers 54 through 69

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Sensors & Inputs Many sensors are variations on switches Switches make or break a connection
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Sensors & Inputs Many sensors are variations on switches Switches make or break a connection

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Many Kinds of Switches Tilt sensor has a little ball inside Magnetic switches are delicate The hex switch is actually many switches in one, and outputs 4 signals
Описание слайда:
Many Kinds of Switches Tilt sensor has a little ball inside Magnetic switches are delicate The hex switch is actually many switches in one, and outputs 4 signals

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Digital Input Switches make or break a connection But Arduino wants to see a voltage Specifically, a “HIGH” (5 volts) or a “LOW” (0 volts) How do you go from make/break to HIGH/LOW?
Описание слайда:
Digital Input Switches make or break a connection But Arduino wants to see a voltage Specifically, a “HIGH” (5 volts) or a “LOW” (0 volts) How do you go from make/break to HIGH/LOW?

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From Switch to HIGH / LOW With no connection, digital inputs “float” between 0 & 5 volts (LOW & HIGH) Resistor “pulls” input to ground (0 volts) Pressing switch “pushes” input to 5 volts Press is HIGH Not pressed is LOW Pull-down resistor
Описание слайда:
From Switch to HIGH / LOW With no connection, digital inputs “float” between 0 & 5 volts (LOW & HIGH) Resistor “pulls” input to ground (0 volts) Pressing switch “pushes” input to 5 volts Press is HIGH Not pressed is LOW Pull-down resistor

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Pull-up and Pull-down pull-up resistors – pull the voltage up to the 5V line that the resistor is connected to pull-down resistors – pull the voltage down to 0 volts Although 10K ohms is a commonly used value, anything between 4.7K and 20K or more will work
Описание слайда:
Pull-up and Pull-down pull-up resistors – pull the voltage up to the 5V line that the resistor is connected to pull-down resistors – pull the voltage down to 0 volts Although 10K ohms is a commonly used value, anything between 4.7K and 20K or more will work

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Control the Blinking Connect a button to pin 2 with a pull-down resistor Turn on LED if button pressed and OFF if released
Описание слайда:
Control the Blinking Connect a button to pin 2 with a pull-down resistor Turn on LED if button pressed and OFF if released

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Control the Blinking
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Control the Blinking

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Let’s Wire It Up Going from schematic to physical circuit.
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Let’s Wire It Up Going from schematic to physical circuit.

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Solderless Breadboards
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Solderless Breadboards

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Useful Tools
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Useful Tools

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Making Jumper Wires
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Making Jumper Wires

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Using Solderless Breadboards Using needle nose pliers can help push wires & components into holes
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Using Solderless Breadboards Using needle nose pliers can help push wires & components into holes

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All Wired Up
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All Wired Up

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Using Switches to Make Decisions Often you’ll want to choose between actions, based on a data obtained from switch-like sensor E.g. “If motion is detected, turn on the lights” E.g. “If flower pot soil is dry, turn on sprinklers” Define actions, choose them from sensor inputs Let’s try that with the actions we currently know E.g.: If button is pressed send “Hello!” to serial port, and if released send “Goodbye!”
Описание слайда:
Using Switches to Make Decisions Often you’ll want to choose between actions, based on a data obtained from switch-like sensor E.g. “If motion is detected, turn on the lights” E.g. “If flower pot soil is dry, turn on sprinklers” Define actions, choose them from sensor inputs Let’s try that with the actions we currently know E.g.: If button is pressed send “Hello!” to serial port, and if released send “Goodbye!”

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Control the Blinking (pull-up)
Описание слайда:
Control the Blinking (pull-up)

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Switch Without External Resistors Arduino has internal pull-up resistors that can be enabled by writing a HIGH value to a pin that is in INPUT mode
Описание слайда:
Switch Without External Resistors Arduino has internal pull-up resistors that can be enabled by writing a HIGH value to a pin that is in INPUT mode

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Reliably Detecting the Switch State contact bounce produces spurious signals at the moment the switch contacts close or open avoid false readings due to contact bounce - debouncing
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Reliably Detecting the Switch State contact bounce produces spurious signals at the moment the switch contacts close or open avoid false readings due to contact bounce - debouncing

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Analog Input To computers, analog is chunky
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Analog Input To computers, analog is chunky

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Analog Input Many states, not just two (HIGH/LOW) Number of states (or values, or “bins”) is resolution Common computer resolutions: 8-bit = 256 values 16-bit = 65,536 values 32-bit = 4,294,967,296 values
Описание слайда:
Analog Input Many states, not just two (HIGH/LOW) Number of states (or values, or “bins”) is resolution Common computer resolutions: 8-bit = 256 values 16-bit = 65,536 values 32-bit = 4,294,967,296 values

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Analog Input Arduino (ATmega168) has six ADC inputs (ADC = Analog to Digital Converter) Reads voltage between 0 to 5 volts Resolution is 10-bit (1024 values) In other words, 5/1024 = 4.8 mV smallest voltage change you can measure
Описание слайда:
Analog Input Arduino (ATmega168) has six ADC inputs (ADC = Analog to Digital Converter) Reads voltage between 0 to 5 volts Resolution is 10-bit (1024 values) In other words, 5/1024 = 4.8 mV smallest voltage change you can measure

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Analog Input Sure sure, but how to make a varying voltage? With a potentiometer. (pot)
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Analog Input Sure sure, but how to make a varying voltage? With a potentiometer. (pot)

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Potentiometers Moving the knob is like moving where the arrow taps the voltage on the resistor When a resistor goes across a voltage difference, like +5V to Gnd, the voltage measured at any point along a resistor’s length is proportional to the distance from one side.
Описание слайда:
Potentiometers Moving the knob is like moving where the arrow taps the voltage on the resistor When a resistor goes across a voltage difference, like +5V to Gnd, the voltage measured at any point along a resistor’s length is proportional to the distance from one side.

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What good are pots at? Anytime you need a ranged input Measure rotational position steering wheel, robotic joint, etc. But more importantly for us, potentiometers are a good example of a resistive sensor
Описание слайда:
What good are pots at? Anytime you need a ranged input Measure rotational position steering wheel, robotic joint, etc. But more importantly for us, potentiometers are a good example of a resistive sensor

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Arduino Analog Input Plug pot directly into breadboard Two “legs” plug into +5V & Gnd (red + & blue -) buses Middle “post” plugs into a row (row 7 here) Run a wire from that row to Analog In 2
Описание слайда:
Arduino Analog Input Plug pot directly into breadboard Two “legs” plug into +5V & Gnd (red + & blue -) buses Middle “post” plugs into a row (row 7 here) Run a wire from that row to Analog In 2

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Pot & LED Circuit
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Pot & LED Circuit

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Pot Blink Rate
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Pot Blink Rate

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