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Hello friends.

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Today I will tell you how to interface a LDR module or LDR sensor using Mario.

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In this case I just use LDR to generate signal for Mario.

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I just acquire this signal using two methods.

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One is using analog signal, one is using digital signal.

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So let's go for this.

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So first case I just use Express VI.

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So over here, this is my radio.

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I just use analog input over here.

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I'm just using the Express VI.

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Or here on this module we have three pins.

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One is VCC.

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I just connect it to five volt.

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One is ground.

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I just connect it to ground and one is my input.

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I just connect it to analog input.

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Okay.

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So I just place analog input over here.

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Let's check what happened when the signal is there.

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So right now you have to select the pin.

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I just connect this to a zero analog input.

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Zero pin pin number three.

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I'll just connect it over here.

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Now you just create a indicator over here.

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I just use this meter.

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Connect this meter.

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Create a while loop over here for continuous reading.

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Create controls.

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Save the code.

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Run the code.

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It will deploy, as you see right now.

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The value is nearby zero.

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When I just put my hand over it, it is generating around five volt.

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Okay.

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So right now it is generating around five volt signal.

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So if you want to check the value, also just create its digital display over here.

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As you see, I just make it large for you so that it is visible.

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So again, save it, run it.

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Right now it is when light is there, it is generating 0.395V.

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And when I just put my hand over it, it will generate 4.85 around Volt.

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Okay, so this is how you can interface using LDR with the help of analog input.

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Now I just use digital pin in place of this, so I just close this, go to my radio.

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I need to remove this one.

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Also go to my toolbox.

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Digital input I have to select.

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In this case, when I just use digital signal, you have to just change the pin.

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Also, as you see right now, I'm just using analog pin that is zero is at 11.

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I want to just use 31 pin, let's say analog digital input output pin ten that is available at 31.

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Okay.

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So I just select Port A.

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Okay, PIN number 31 is there.

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So I just remove this red wire from here and connect this wire to 31 number pin over here.

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This is my 31 number pin available.

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I need to just put one over here Boolean, which will show me the signal.

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I just connect this save It controls.

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This is a case using express.

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Now you need to deploy the code inside this when the code is deployed.

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When I just put my hand as you see it will turn on the boolean led if you want to.

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So the output on hardware also, let's say I'm just using.

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Lead Express VI also led button I'm just using over here.

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I just need to drag it over here.

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In this case, let's say I want to.

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Put the output of this LDA on zero.

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So you need to select that particular place.

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Okay.

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Just connect this particular led with your Mario output or a digital output.

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So over here I just connect it, control you.

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It will minimize.

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So it will show me on this button also in the software, also in the hardware also.

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So let's say I want to just save it.

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Now deploy the code.

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As you see right now.

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Onboard LEDs off, as you see on software.

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It is also when I just put my hand over it, software goes high and LEDs zero also high.

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So this is how you can use your hardware to generate software and hardware

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results.

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So now in this case I am just using Express VI.

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So in my earlier video I just used low level programming for analog.

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Now I just go for the digital signals for analog, low level programming.

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So I just select over here digital input output over here.

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So first you need to open, then you need to read the signal, then you need to close.

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So over here, you need to connect all these functions.

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Create control over here.

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I need to select PIN number ten Digital input Output pin number ten.

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That is available on.

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It is not digital input output pin I need to check.

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So I just go to the over here.

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So this is the input output.

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PIN number ten is at 31 pin.

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I just connect this pin already.

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So pin number ten, I have to select over here.

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Control T now I just need to create a while loop over here.

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Create control over here to stop this.

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Just show the values I need a Led right now.

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I just use the square led in place of this connect.

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This led.

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As you see right now, it is a different type of data.

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I just connect over here.

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I need to go to index array function, connect this one over here, create a constant over here and

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connect this one to this particular control u to minimize the code.

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Save it.

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Run it.

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Deploy it.

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This is how you can go with low level programming.

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In the case of when I just put my hand, it will turn on off, on off.

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This is how you can create, generate signals or acquire signals.

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Right now I am just acquiring the signal.

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Let's say I want to generate the signal on the hardware.

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Also in the previous case also as we discussed.

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So over here I just go to again my low level programming.

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I just need to write the signal in this case, just select this over here.

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Same.

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I just need to copy this.

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Over here.

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I just need to write.

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I just copy this clause.

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Also connect this one.

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Replace these values with shift registers so that some error is not there.

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Chef starts.

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Now you need to set the channel over here.

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Let's say I want to go with a Led on board led to, let's say in this case.

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So over here it will generate the signal for me.

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Control B again, you need to set build an array over here.

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Connect this particular led.

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Give this signal to over here.

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Control u to minimize.

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Save it.

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Right now the signal is displayed on Led.

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To run it.

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Deploy it.

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So now as you see, the code is deployed.

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It is taking time.

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As you see, when I just put my hand to goes high.

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It is visible to you on board.

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Led goes high and on the software also.

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So this is how you can go for digital signal acquisition or LDR.