Let's take a moment to have a quick look at this circuit that I have implemented here on my breadboard,
you can see the circuit here.
And actually what you see is the completed circuit.
Is that the target, what we are aiming for to implement by the end of this whole court.
But inside the red boxes, I have indicated the bits out of the complete circuit that I have implemented
on my breadboard.
And the most important component here is this part here, which includes this circuit with a tip, one
hundred and twenty two, which controls the modem.
So this circuit essentially includes this capacitor here and the short key diode, which protects especially
the short kidi it protects the rest of the circuit from back from the motor.
And the motor is represented by this connector here, which is my hobby motor right here in my implementation.
And the capacitor which I have just used a small I believe it's a one hundred micro farhod ceramic capacitor
instead of the electrolytic that I'm showing here.
It doesn't need to be in electrolytic capacitor.
It just needs to be a capacitor like this one appropriate for whichever motor you're using.
I've gone through a bunch of capacitors to figure out which one works better, especially with this
motor here, which it does produce quite a bit of noise, which interferes not so much with the operation
of the ESB 32, but with the operation of the sensor itself.
So I discovered this.
I was working on the project in later stages that this sensor here and it's data wire was resitting
interference from the motor when the motor was running.
So adding a capacitor helped with that.
And I had this.
I said I had to go through a few capacitors to figure out which one dampened most of the noise to allow
for the sensor to work.
So you may need to do that as well yourself.
If you are working with a larger motor, what you can do is instead of controlling it via a transistor,
which of course does provide the electrical part for noise to go from one end of the circuit to the
other, it can go for something that is able to isolate the motor or the high voltage part with the
noise from the rest of the circuit, like it could be a mechanical relay, for example.
And that should eliminate the noise issue.
So that's what I've got here in terms of controlling the transistor itself from my ISP 32, I've got
a three hundred and thirty ohm current emitting resistor, which is this resistor right here, and then
via the green wire connected to digital pen, I should say, 32 is what signals their two point twenty
two to open up.
I also have a 20 kilogram pull down resistor here that you can see.
And the other and the modem battery is implemented by using my benchtop power supply through the wires
and the banana clips and providing five volts paramount to the power radio down here, which is represented
by these two lines.
There's this one here and that.
And last but not least, I've got this simple circuit here implemented to power that own the indicator
right here so that when power is applied, this day will just light up when there is three point three
vaults on the bottom power or this power right here and it's embedded with the circuit.
Let's move on to the next lecture now.
I'll show you the sketch that is running on my specifically to.