Madhurig at 13:05, 30 January 2017

2017-01-30T13:05:52Z

Nancyvarkey at 03:47, 7 August 2015

2015-08-07T03:47:35Z

Nancyvarkey at 03:46, 7 August 2015

2015-08-07T03:46:56Z

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Nancyvarkey at 13:01, 5 August 2015

2015-08-05T13:01:31Z

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Kaushik Datta: Created page with "{| border=1 ||'''Visual Cue''' ||'''Narration''' |- || '''Slide Number 1''' '''Title Slide''' || Hello everyone. Welcome to this tutorial on '''Communicating to ExpEYES usi..."

2015-08-03T06:46:59Z

Created page with "{| border=1 ||'''Visual Cue''' ||'''Narration''' |- || '''Slide Number 1''' '''Title Slide''' || Hello everyone. Welcome to this tutorial on '''Communicating to ExpEYES usi..."

New page

{| border=1
||'''Visual Cue'''
||'''Narration'''
|-
|| '''Slide Number 1'''

'''Title Slide'''

|| Hello everyone.

Welcome to this tutorial on '''Communicating to ExpEYES using Python'''.

|-
|| '''Slide Number 2+3'''

'''Learning Objectives'''

We will learn about,

* Introduction to Python

* Measure AC voltage using Plot window & Python

* Generate a Sine wave

* Measure external and internal voltages using Python

* Measure capacitance & resistance using Plot window & Python

* Generate a Square wave

* Show connections & circuit diagrams
|| In this tutorial we will learn:

* Introduction to Python

* Measure AC voltage using Plot window and Python

* Generate a Sine wave

* Measure external and internal voltages using Python

* Measure capacitance and resistance using Plot window & Python

* Generate a Square wave

* Show connections and circuit diagrams for our experiments.

|-
|| '''Slide Number 4'''

'''System Requirement'''

* '''ExpEYES''' v 3.1.0

* '''Ubuntu Linux '''OS v. 14.10
|| Here I am using,

* '''ExpEYES '''version 3.1.0

* '''Ubuntu Linux ''' OS version 14.10
|-
|| '''Slide Number 5'''

'''Pre-requisties'''

You should be familiar with:

'''ExpEYES ''' junior interface.

For relevant tutorials, visit our website.

'''www.spoken-tutorial.org'''.
|| To follow this tutorial, you should be familiar with:

'''ExpEYES Junior''' interface.

Basic '''Python programming'''.

If not, for relevant tutorials, please visit our website.
|-
||
|| Let's begin with introduction to '''Python'''.
|-
||'''Slide Number 6'''

'''Introduction to Python'''

* Simple & easy to learn powerful programming language.

* Free & Open Source cross platform high level language.

* Effective approach to object oriented program.
||
* '''Python''' is simple and easy to learn powerful programming language.

* It is Free and Open Source cross platform high level language.

* It has effective approach to '''Object oriented''' program.
|-
||
|| Let's make sure that '''Python''' is installed on our system.
|-
|| Press '''CTRL+ ALT''' and '''T''' keys.
|| Press '''CTRL+ ALT''' and '''T''' keys to open the Terminal.
|-
|| Type '''python''', press enter.

Point to the default version of '''Python'''
||To start '''Python interpreter''' type''' python''' and press enter.

Details regarding default version of '''Python''' will be displayed on the Terminal.
|-
|| Point to the angle brackets.
|| The displayed three angle brackets indicate '''Python''' prompt(>>>).

Now you are ready to type commands
|-
||'''Slide Number 7'''

'''Details About Python'''

For more details about '''Python''' programming

'''www.spoken-tutorial.org'''.
|| For more details about '''Python''' programming please visit our website.
|-
||
|| I will discuss about the channels on the top '''Panel''' of the device.
|-
|| Point to the top '''Panel'''
|| On the top''' Panel''' each terminal is assigned to a specific channel number.
|-
|| Point to '''A1'''

Point to '''A2'''
|| For example channel '''1''' is assigned to '''A1''' and channel '''2''' to '''A2'''.
|-
|| Point to the device.
||I will show how to connect wires to the device
|-
|| Point to the screw terminals.
|| Device has screw terminals on either sides.
|-
|| Point to the screw terminals.

Show the process.

Point to the circuit diagram.

||To make the connection we insert wires into the terminals and tighten the screws.

Here '''A2 '''is connected to '''SINE.'''

This is the circuit diagram.
|-
|| '''Slide Number 8'''

To measure voltage of '''A2'' and show its '''Sine wave'''
|| Let's perform an experiment to measure the voltage of '''A2 ''' and show its '''Sine wave'''.
|-
||
||Let's see the result on the '''Plot window'''.
|-
|| Point to '''A2'''.

Point to voltage.
|| On the '''Plot window''', click on '''A2''' to display the voltage of '''A2'''.

Voltage of '''A2''' is displayed below.
|-
|| Click on '''A2''', drag to channel '''CH1'''.
|| Click on '''A2''' and drag to channel '''CH1'''

when we drag '''A2''' to '''CH1''' input data of '''A2 '''is assigned to '''CH1'''.

|-
|| Move '''msec/div''' slider to show the '''Sine wave'''.

Click on '''A2''', show changing voltage of '''A2'''.
|| Move the '''msec/div ''' slider to show the '''Sine wave'''.

Click on '''A2 ''' to show change in voltages of '''A2'''.
|-
|| Click on '''CH1''', drag to '''FIT'''.

Point to voltage.
|| Click on '''CH1''' and drag to '''FIT'''.

The voltage and frequency of '''A2''' is displayed on the right.
|-
||
|| We will perform the same experiment and measure voltage of '''A2''' using '''Python.'''
|-
|| '''Slide Number 9'''

'''Note'''

To avoid errors on the '''Python interpretor''':

* Connect the device to the system.

* Close the Plot window.

|| Please note to avoid errors on '''Python interpreter:'''

* Connect the device to the system.

* Close the '''Plot window'''.
|-
||Type at the prompt:

'''import expeyes.eyesj''' press enter.
|| To import “'''eyes'''” library from '''ExpEYES''', type at the prompt:

'''import expeyes.eyesj''' press enter.
|-
|| Type at the prompt:
'''import expeyes.eyesj''' press enter.

Point to '''open()''' function

Point to the lines
|| Type '''p=expeyes.eyesj.open() ''' and press enter.

'''open() ''' function returns an object if hardware is found.

These lines will load the '''ExpEYES''' library and establish connection to the device.
|-
|| Type '''print p.get_voltage(2).'''

Point to voltage.

Point to voltages.
|| To view the voltage of '''A2''', type

'''print p.get_voltage(2) ''' and press enter.

Output shows voltage of '''A2'''

Similarly, we can show the various voltages of '''A2'''.

Voltage of '''A2''' changes as it is an '''AC ''' voltage.

|-
|| '''Slide Number 10'''

'''Install'''

To generate plots using '''Python interpreter''':

Install '''python-matplotlib''' library using '''Synaptic Package Manager'''.
|| To generate plots using '''Python interpreter''':

Install '''python-matplotlib''' library using '''Synaptic Package Manager'''.

I have already installed '''python-matplotlib''' library on my system.
|-
||'''Slide Number 11'''

'''Install'''

To generate plots on '''Windows OS:'''

Download and install,

'''matplotlib v 1.4.3'''

'''numpy v 1.9 ''' or above.

Copy the installed '''ExpEYES''' files and drivers and paste in '''C drive'''.
|| To generate plots on '''Windows Operating system:'''

Download and install,

* '''matplotlib version 1.4.3 '''

* '''numpy version 1.9''' or above.

Copy the installed '''ExpEYES''' files and drivers and paste in '''C drive'''.
|-
|| Type '''import expeyes.eyesj, '''press enter.

Type''' p=expeyes.eyesj.open(),''' press enter.
|| To generate '''Sine wave''', at the python prompt,

Type '''import expeyes.eyesj''' and press enter.

Type''' p=expeyes.eyesj.open() ''' and press enter as before.

|-
|| Type '''from pylab import '''<nowiki>*</nowiki>(asterisk), press enter.

Point to '''from pylab import *'''
|| Type '''from pylab import '''<nowiki>*</nowiki>(asterisk).

'''from pylab import *''' is a program from '''matplotlib library'''.
Press enter.
|-
|| Type ''' ion()''', press enter.

Point to '''ion()'''
|| Type''' ion() '''

This command sets '''pylab ''' interactive mode.

press enter.

|-
|| Type ''' t,v=p.capture(2,200,100),''' press enter.

Point to “'''t,v'''

Point to “'''2”''',

Point to “200”

Point to “100”
|| Type''' t,v=p.capture(2,200,100)'''.

“'''t,v''' are time and voltage vectors.

“2” is channel number for '''A2''',

“200” is the number of data points,

“100” is a time interval between subsequent measurements.

Press enter
|-
|| type '''plot(t,v),''' press enter.

Point to Sine wave
|| To view the output, type '''plot(t,v)'''

'''plot(t,v)''' generates a '''Sine wave''' on a new window.

Press enter
|-
|| Show the screen.
|| We can generate a '''Sine wave''', using the above commands on '''Windows command prompt''' as well.
|-
||'''Slide Number 12'''

External Voltage

Measure voltage of '''A1''' using a battery as an external voltage source.
|| Next let's measure voltage of '''A1''' using a battery as an external voltage source.
|-
|| Show the circuit diagram
|| To measure external voltage source, '''Ground(GND)''' is connected to '''A1''' through a battery of '''3V'''.

This is the circuit diagram.

We will show the value of '''A1''' using '''Python interpreter.'''
|-
||At the python prompt:

Type '''import expeyes.eyesj''', press enter.

Type '''p=expeyes.eyesj.open()''', press enter.
||At the python prompt:

Type '''import expeyes.eyesj,''' and press enter.

Type''' p=expeyes.eyesj.open(), '''press enter.

|-
||Type '''print p.get_voltage(1),''' and press enter.

Point to channel1.

Point to voltage of '''A1.'''
|| Type '''print p.get_voltage(1)''' and press
enter.

Here '''Channel 1''' is assigned to '''A1'''.

Voltage of '''A1''' is displayed on the terminal.
|-
|| '''Slide Number 13'''

'''Internal Voltage'''

Measure voltage of '''A1''' using PVS as internal voltage source.
|| let's measure voltage of '''A1''' using '''PVS''' as internal voltage source.
|-
|| Show the circuit diagram.
|| In this experiment ''' PVS''' is connected to '''A1'''.

This is the circuit diagram.
|-
|| Type '''print p.set_voltage(3)''', press enter.

Point to value of ''' PVS'''.

Point to voltage.
|| Back to the terminal.

Type '''print p.set_voltage(3) ''' and press enter

Here voltage of '''PVS''' will be set to 3 volts.

Voltage of '''PVS''' is displayed.

|-
|| Type '''print p.get_voltage(1),''' press enter.

Point to voltage.
|| Type '''print p.get_voltage(1) ''' and press enter.

Voltage of '''A1''' is displayed on the terminal.
|-
|| '''Slide Number 14'''

AC and DC components of a voltage using a capacitor & resistor and generate a square wave.
|| Now I will demonstrate '''AC''' and '''DC''' components of a voltage using '''capacitor''' and '''resistor.'''

And also 'generate a '''square wave.'''
|-
|| Show the picture.

Show the circuit diagram.
|| In this experiment '''A1''' is connected to '''SQR1'''.

'''SQR1''' is connected to '''A2''' through a '''capacitor'''.

'''A2 '''is connected to '''ground(GND)''' through 200k '''resistor'''.

This is the circuit diagram.

|-
||
|| Let's see the result on the '''Plot window'''
|-
|| Point to the '''Plot window'''.

Click on '''Measure C on IN1''' button.

Point to '''Capacitance.'''
|| On the '''Plot window''' click on '''Measure C on IN1''' button.

'''Capacitance''' of '''IN1 '''is displayed as '''-0.6pF'''(pico farads).
|-
|| Click on '''Measure R on SEN''' button.

Point to the '''Resistance''' value of '''SEN'''.
|| Click on '''Measure R on SEN''' button.

'''Resistance '''of '''SEN''' is displayed as''' 560Ω'''(ohms)

Please note you may get slightly different values of '''Capacitance''' & '''Resistance'''.
|-
|| Click on '''SQ1,''' drag to '''CH1'''.

Point to assigned value.
|| Click on '''SQ1''' and drag to''' CH1'''.

'''SQ1''' is assigned to channel '''CH1'''.
|-
|| Click on''' A2''', drag to '''CH2.'''

Point to assigned value.
|| Click on '''A2 '''and drag to''' CH2.'''

'''A2''' is assigned to channel '''CH2. '''

|-
|| Click on '''SQR1''' check box.

Move the '''msec/div''' slider.
|| Click on '''SQR1''' check box to show the '''Square waves.'''

Move the ''' msec/div '''slider to adjust the waves.
|-
|| Click on '''CH2''', drag to '''FIT'''.

Point to displayed voltage and frequency of '''A2'''.
|| Click on '''CH2''' and drag to '''FIT'''.

Voltage and frequency of '''A2 '''is displayed on the rightside.

|-
|| '''Slide Number 15'''

Measure '''Capacitance, Resistance '''and generate a Square wave''' using '''Python interpreter.'''
|| We will perform the same experiment to: Measure '''Capacitance, Resistance '''and generate a Square wave''' '''using '''Python interpreter.'''
|-
|| At the python prompt:

Type '''import expeyes.eyesj''', press enter.

Type '''p=expeyes.eyesj.open()''', press enter.
|| At the python prompt:

Type '''import expeyes.eyesj''' and press enter.

Type''' p=expeyes.eyesj.open() ''' and press enter.
|-
|| Type '''p.measure_cap()''', press enter.

Point to displayed capacitance value
|| To display the '''Capacitance ''' value:

Type '''p.measure_cap( )''' and press enter.

'''Capacitance''' value is displayed on the terminal.
|-
|| Type '''p.measure_res(),''' press enter.
|| To display the '''Resistance '''value:

Type '''p.measure_res() ''' and press enter.

'''Resistance''' value is displayed on the terminal.

|-
|| Type '''from pylab import *, '''press enter.

Type''' ion() '''and press enter.
|| To generate a Square wave:

Type '''from pylab import *'''(asterisk) and press enter.

Type ''' ion()''' and press enter.

|-
|| Type '''print p.set_sqr1(100),''' and press enter

Type''' t,v=p.capture(6,400,100)''' and press enter
|| Type '''print p.set_sqr1(100) '''and press enter.

Here 100 is the frequency of the square wave.

Type''' t,v=p.capture(6,400,100)''' and press enter.

|-
|| Type '''plot(t,v)''' and press enter.

Point to generated square wave.
|| Type''' plot(t,v)'''.

'''plot(t,v) '''generates a square wave on a new window.

Press enter

|-
||
|| Let's summarize.
|-
|| '''Slide Number 16'''

'''Summary '''

We have learnt:

* Introduction to Python

* Measure AC voltage using Plot window & Python

* Generate a Sine wave

* Measure external and internal voltages using Python

* Measure capacitance & resistance using Plot window & Python

* Generate a Square wave

* Show connections & circuit diagrams for our experiments

||
* Introduction to Python

* Measure AC voltage using Plot window and Python

* Generate a Sine wave

* Measure external and internal voltages u sing
Python

* Measure capacitance and resistance using Plot window and Python

* Generate a Square wave

* Show connections and circuit diagrams for our experiments
|-
|| '''Slide Number 17'''

As an assignment,

Measure the resistance of your finger using Plot window.

Using python generate a combination of Sine and Square waves.

Show circuit diagrams for the above experiment.
|| As an assignment,

Measure the resistance of your finger using Plot window.

Using python generate a combination of Sine and Square waves.

Show circuit diagrams for the above experiment.

|-
|| '''Slide Number 18'''

'''Acknowledgement '''

Watch the video available at

http://spoken-tutorial.org

/What is a Spoken Tutorial

It summarises the Spoken Tutorial

project.

If you do not have good bandwidth,

you can download and watch it.
||
* This video summarises the Spoken Tutorial project

* If you do not have good bandwidth, you can download and watch it.

|-
|| '''Slide Number 19'''

The Spoken Tutorial Project Team

Conducts workshops using spoken

tutorials

Gives certificates to those who pass

an online test

For more details, please write to

'''contact@spoken-tutorial.org'''
|| * We conduct workshops using SpokenTutorials and give certificates.

* Please contact us.
|-
|| '''Slide number 20'''

Spoken Tutorial Project is a part of

the Talk to a Teacher project

It is supported by the National

Mission on Education through ICT,

MHRD, Government of India

More information on this Mission is

available at

''' http://spoken-tutorial.org

/NMEICT-Intro '''
|| The Spoken Tutorial Project is funded by '''NMEICT, MHRD Government of India'''.
|-
||
|| This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi..

Thank you for joining.

|}

@@ Line 297: / Line 297: @@
 || Type '''from pylab import '''<nowiki>*</nowiki>(asterisk).
-'''from pylab import *''' is a program from '''matplotlib library'''.
+'''pylab''' is a program from '''matplotlib library'''.
 Press '''Enter'''.
 |-

@@ Line 26: / Line 26: @@
 * Measure external and internal voltages using '''Python'''
-* Measure capacitance & resistance using Plot window & '''Python'''
+* Measure '''capacitance''' & '''resistance''' using Plot window & '''Python'''
 * Generate a '''Square wave'''
@@ Line 41: / Line 41: @@
 * Measure external and internal voltages using '''Python'''
-* Measure capacitance and resistance using Plot window & '''Python'''
+* Measure '''capacitance''' and '''resistance''' using Plot window & '''Python'''
 * Generate a '''Square wave'''

ExpEYES/C2/Communicating-to-ExpEYES-using-Python/English - Revision history

Madhurig at 13:05, 30 January 2017

Nancyvarkey at 03:47, 7 August 2015

Nancyvarkey at 03:46, 7 August 2015

Nancyvarkey at 13:01, 5 August 2015

Kaushik Datta: Created page with "{| border=1 ||'''Visual Cue''' ||'''Narration''' |- || '''Slide Number 1''' '''Title Slide''' || Hello everyone. Welcome to this tutorial on '''Communicating to ExpEYES usi..."