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Let's take a moment to have a quick look at this circuit that I have implemented here on my breadboard,

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you can see the circuit here.

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And actually what you see is the completed circuit.

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Is that the target, what we are aiming for to implement by the end of this whole court.

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But inside the red boxes, I have indicated the bits out of the complete circuit that I have implemented

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on my breadboard.

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And the most important component here is this part here, which includes this circuit with a tip, one

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hundred and twenty two, which controls the modem.

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So this circuit essentially includes this capacitor here and the short key diode, which protects especially

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the short kidi it protects the rest of the circuit from back from the motor.

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And the motor is represented by this connector here, which is my hobby motor right here in my implementation.

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And the capacitor which I have just used a small I believe it's a one hundred micro farhod ceramic capacitor

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instead of the electrolytic that I'm showing here.

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It doesn't need to be in electrolytic capacitor.

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It just needs to be a capacitor like this one appropriate for whichever motor you're using.

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I've gone through a bunch of capacitors to figure out which one works better, especially with this

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motor here, which it does produce quite a bit of noise, which interferes not so much with the operation

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of the ESB 32, but with the operation of the sensor itself.

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So I discovered this.

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I was working on the project in later stages that this sensor here and it's data wire was resitting

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interference from the motor when the motor was running.

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So adding a capacitor helped with that.

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And I had this.

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I said I had to go through a few capacitors to figure out which one dampened most of the noise to allow

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for the sensor to work.

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So you may need to do that as well yourself.

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If you are working with a larger motor, what you can do is instead of controlling it via a transistor,

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which of course does provide the electrical part for noise to go from one end of the circuit to the

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other, it can go for something that is able to isolate the motor or the high voltage part with the

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noise from the rest of the circuit, like it could be a mechanical relay, for example.

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And that should eliminate the noise issue.

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So that's what I've got here in terms of controlling the transistor itself from my ISP 32, I've got

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a three hundred and thirty ohm current emitting resistor, which is this resistor right here, and then

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via the green wire connected to digital pen, I should say, 32 is what signals their two point twenty

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two to open up.

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I also have a 20 kilogram pull down resistor here that you can see.

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And the other and the modem battery is implemented by using my benchtop power supply through the wires

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and the banana clips and providing five volts paramount to the power radio down here, which is represented

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by these two lines.

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There's this one here and that.

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And last but not least, I've got this simple circuit here implemented to power that own the indicator

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right here so that when power is applied, this day will just light up when there is three point three

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vaults on the bottom power or this power right here and it's embedded with the circuit.

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Let's move on to the next lecture now.

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I'll show you the sketch that is running on my specifically to.