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Hello, friends.

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Today I will tell you how to read analog data using Visa.

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In this case I just use Arduino board and one potentiometer as you see in the hardware portion over

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here.

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This is my potentiometer.

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I just connect its one end with the five volt or you can say VCC, another end is with, it is connected

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to the ground and middle one.

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Or you can say wiper is connected to the A zero pin.

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So over here I just open Arduino code

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for this

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particular case.

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In this case, one minute it will take some time

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over here, this is my Arduino IDE and this Arduino IDE.

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I just set a variable,

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as you see over here.

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This is the code I already write.

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I just use this variable name initially, then void setup.

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In this case, you have to pinmode.

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I'm using a zero and it is my input pin in the Arduino board.

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Every value analog value, it is converted into digital value because ADC is present over every pin.

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Okay.

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So in the Arduino we have total A0 to a5 total six analog pins are there right now I'm using A0 and

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over here this is my variable.

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I just read analog read.

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The pin number is zero serial print line.

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And over here this is my variable.

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I just put a delay of 50.

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You can also check in the serial monitor.

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I just run it.

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Let's check what value is there over here?

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This is the value.

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Seven, seven, five.

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In the case of when five volt is there, it will print 1024 and when zero volt is there, it will print

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zero.

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Okay, so this is the code I just upload inside the Arduino board

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right now.

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As you see, uploading is completed.

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I just close this Pi.

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Now just go to the lab view over here.

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Just go to the instrument input output or here in the serial, I just configure portfast, create control

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over here.

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Then in this also you need to set the baud rate.

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Then you just go to the input output.

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Over here you just select bytes at serial port Connect resource to resource error into error out.

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After this I just need to still not read.

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I just read VSA read.

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Okay.

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So over here I just I have read visa

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connect error into error out bytes at port to this bytes count.

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Okay.

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So over here I got the data create indicator for this.

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It will show me the data.

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Now I just close this also.

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So close this.

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I just connect simple error handler.

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Now I just go for continuous reading.

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Create control over here.

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Over here.

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I got the data.

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Okay, so this will show me the data.

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And over here I have to set the visa resource and this is my stop button.

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So now I just hit on run button.

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Let's check what happened before this.

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You need to set the visa resource also.

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As you see over here, it is asking me the com port eight is my source.

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When I hit on run button,

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I just need to stop it again.

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Hit on run button.

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So in this case I just reset it, run it again.

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My com port is shared right now as you see.

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Stop this one.

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In this case I just remove my USB again.

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Connect it.

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Let's check it is shared or not.

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Again hit on run button.

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Let's check data.

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Is there or not?

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The data is not visible to us because delay.

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I should put some delay also inside this.

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So I just put 50.

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50 milliseconds delay right now, as you see.

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808 is present over here.

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And when I move it right now, it is changing.

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Right now it is 3 to 6.

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So if you want to just maximize it.

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Just go over here size, as you see over here, you just got the size.

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And if you want some interactive display over here, in this case, I just use the gauge.

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And the range of this gauge is 1024.

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I just connect this gauge to over here before this because over here data is in string form.

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I need to convert this.

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I just go to string conversion fractional.

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But exponential strain to number.

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This is fractional string.

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I just connect this number over here.

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Right now, when I just hit on the button, as you see over here, I just got the data.

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And when I move this, it is changing.

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And right now it is maximum.

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Okay.

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And right now I just change it.

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So this is how you can read analog data using visa resource.

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This is the code.

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This is all about today's lecture.

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Thank you.