Electronics- Block Diagramsdenethor.wlu.ca/pc320/lectures/blockbeam.pdf · Electronics Block...

IntroductionExamples

Evaluation

ElectronicsBlock Diagrams

Terry Sturtevant

Wilfrid Laurier University

February 13, 2019

Terry Sturtevant Electronics Block Diagrams


Evaluation

Introduction

There are many different ways to describe a circuit or asystem.One way to describe a circuit is with a schematic diagram.For a large or complex circuit, a schematic diagram may bedifficult to understand.A block diagram allows a circuit or system to be described asa set of modules.By identifying the modules, and showing how they areconnected, it provides a simple overview.Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Introduction

There are many different ways to describe a circuit or asystem.

One way to describe a circuit is with a schematic diagram.For a large or complex circuit, a schematic diagram may bedifficult to understand.A block diagram allows a circuit or system to be described asa set of modules.By identifying the modules, and showing how they areconnected, it provides a simple overview.Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Introduction

There are many different ways to describe a circuit or asystem.One way to describe a circuit is with a schematic diagram.

For a large or complex circuit, a schematic diagram may bedifficult to understand.A block diagram allows a circuit or system to be described asa set of modules.By identifying the modules, and showing how they areconnected, it provides a simple overview.Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Introduction

There are many different ways to describe a circuit or asystem.One way to describe a circuit is with a schematic diagram.For a large or complex circuit, a schematic diagram may bedifficult to understand.

A block diagram allows a circuit or system to be described asa set of modules.By identifying the modules, and showing how they areconnected, it provides a simple overview.Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Introduction

There are many different ways to describe a circuit or asystem.One way to describe a circuit is with a schematic diagram.For a large or complex circuit, a schematic diagram may bedifficult to understand.A block diagram allows a circuit or system to be described asa set of modules.

By identifying the modules, and showing how they areconnected, it provides a simple overview.Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Introduction

There are many different ways to describe a circuit or asystem.One way to describe a circuit is with a schematic diagram.For a large or complex circuit, a schematic diagram may bedifficult to understand.A block diagram allows a circuit or system to be described asa set of modules.By identifying the modules, and showing how they areconnected, it provides a simple overview.

Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Introduction

There are many different ways to describe a circuit or asystem.One way to describe a circuit is with a schematic diagram.For a large or complex circuit, a schematic diagram may bedifficult to understand.A block diagram allows a circuit or system to be described asa set of modules.By identifying the modules, and showing how they areconnected, it provides a simple overview.Each module can then be described individually, and itsfunction more easily understood.



Evaluation

Example with directionsExample indicating signal typesMultiple signals and interfaces

Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensorwhich measures the temperature of the environmentA heaterwhich changes the temperature of the environmentA controllerwhich uses information from the sensor to adjust the heater.

A diagram is simple to make.



Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:

A temperature sensorwhich measures the temperature of the environmentA heaterwhich changes the temperature of the environmentA controllerwhich uses information from the sensor to adjust the heater.




Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensor

which measures the temperature of the environmentA heaterwhich changes the temperature of the environmentA controllerwhich uses information from the sensor to adjust the heater.




Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensorwhich measures the temperature of the environment

A heaterwhich changes the temperature of the environmentA controllerwhich uses information from the sensor to adjust the heater.




Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensorwhich measures the temperature of the environmentA heater

which changes the temperature of the environmentA controllerwhich uses information from the sensor to adjust the heater.




Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensorwhich measures the temperature of the environmentA heaterwhich changes the temperature of the environment

A controllerwhich uses information from the sensor to adjust the heater.




Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensorwhich measures the temperature of the environmentA heaterwhich changes the temperature of the environmentA controller

which uses information from the sensor to adjust the heater.A diagram is simple to make.



Evaluation


Simple Example

A heating system, such as for a house, requires 3 parts:A temperature sensorwhich measures the temperature of the environmentA heaterwhich changes the temperature of the environmentA controllerwhich uses information from the sensor to adjust the heater.




Evaluation


Block diagram

??? ?

??

Heating System Block Diagram



Evaluation


Block diagram

??? ?

??

Can you tell which part is which?



Evaluation


Block diagram

??? ?

??

Now can you tell which part is which?



Evaluation


Block diagram

??? C

??

Now can you tell which part is which?



Evaluation


By indicating signal directions, it makes the flow of controlobvious

The diagram can be easily adapted to more complex systems.



Evaluation


Slightly more complex example

sensor

heat cool

control

Heating and Cooling System Block Diagram



Evaluation


The same block diagram could be used for a similar system ina different context

For instance, this system could be used for controlling thewater temperature in a showerTo do this, replace heater and A/C with valves on the hot andcold lines



Evaluation


The same block diagram could be used for a similar system ina different contextFor instance, this system could be used for controlling thewater temperature in a shower

To do this, replace heater and A/C with valves on the hot andcold lines



Evaluation


The same block diagram could be used for a similar system ina different contextFor instance, this system could be used for controlling thewater temperature in a showerTo do this, replace heater and A/C with valves on the hot andcold lines



Evaluation


Adapted example: shower control

sensor

hot cold

control

Is there anything that needs to change?



Evaluation


Adapted example: shower control

sensor

hot cold

control

Indicating the type of signal conveys important information.



Evaluation


The original block diagram could also be used for a lightcontrol system



Evaluation


Light control system

sensor

light

control

Incandescent Light Control



Evaluation


This will work for incandescent lights

What need to change for LED lights?



Evaluation


This will work for incandescent lightsWhat need to change for LED lights?



Evaluation


LED light control system

sensor

LED

control

LED Light Control; not quite done



Evaluation


LED light control system

sensor

LED

control

Complete LED Light Control



Evaluation


So the previous block diagram describes a system with:

A temperature sensorwhich produces an analog signal to indicate the light levelAn LED lightwhich changes the light levelA controllerwhich takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.

All of this can be determined without any otherdocumentation.



Evaluation


So the previous block diagram describes a system with:A temperature sensor

which produces an analog signal to indicate the light levelAn LED lightwhich changes the light levelA controllerwhich takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.




Evaluation


So the previous block diagram describes a system with:A temperature sensorwhich produces an analog signal to indicate the light level

An LED lightwhich changes the light levelA controllerwhich takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.




Evaluation


So the previous block diagram describes a system with:A temperature sensorwhich produces an analog signal to indicate the light levelAn LED light

which changes the light levelA controllerwhich takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.




Evaluation


So the previous block diagram describes a system with:A temperature sensorwhich produces an analog signal to indicate the light levelAn LED lightwhich changes the light level

A controllerwhich takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.




Evaluation


So the previous block diagram describes a system with:A temperature sensorwhich produces an analog signal to indicate the light levelAn LED lightwhich changes the light levelA controller

which takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.




Evaluation


So the previous block diagram describes a system with:A temperature sensorwhich produces an analog signal to indicate the light levelAn LED lightwhich changes the light levelA controllerwhich takes in the analog signal from the sensor and producesa pulse-width modulated signal to the LED light.




Evaluation


Multiple signals and interfaces

There may be more than one signal between two devicesThere could be several independent signals of the same typeThere could be an interface made up of several dependentsignals with a communication protocol(Interfaces usually include signals in both directions)

It is easy and useful to have symbols for these as well.



Evaluation



There may be more than one signal between two devices

There could be several independent signals of the same typeThere could be an interface made up of several dependentsignals with a communication protocol(Interfaces usually include signals in both directions)




Evaluation



There may be more than one signal between two devicesThere could be several independent signals of the same type

There could be an interface made up of several dependentsignals with a communication protocol(Interfaces usually include signals in both directions)




Evaluation



There may be more than one signal between two devicesThere could be several independent signals of the same typeThere could be an interface made up of several dependentsignals with a communication protocol

(Interfaces usually include signals in both directions)It is easy and useful to have symbols for these as well.



Evaluation



There may be more than one signal between two devicesThere could be several independent signals of the same typeThere could be an interface made up of several dependentsignals with a communication protocol(Interfaces usually include signals in both directions)




Evaluation


What’s the difference between multiple signals and aninterface?

If there is a library to simplify the communication then it is aninterface.If there is no library then you have to handle all of the signalsyourself.This process of handling all of the signals yourself is oftencalled bit-bashing or bit-banging.



Evaluation



If there is a library to simplify the communication then it is aninterface.

If there is no library then you have to handle all of the signalsyourself.This process of handling all of the signals yourself is oftencalled bit-bashing or bit-banging.



Evaluation



If there is a library to simplify the communication then it is aninterface.If there is no library then you have to handle all of the signalsyourself.

This process of handling all of the signals yourself is oftencalled bit-bashing or bit-banging.



Evaluation



If there is a library to simplify the communication then it is aninterface.If there is no library then you have to handle all of the signalsyourself.This process of handling all of the signals yourself is oftencalled bit-bashing or bit-banging.



Evaluation


Multiple signals

Multiple digital signals



Evaluation


Multiple signals

Multiple analog signals



Evaluation


Multiple signals

Multiple pulse-width modulated signals



Evaluation


Multiple signals

UART interface



Evaluation

Evaluation

What can you tell about the Raspberry Pi?


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