Hello.
Now let's look at measuring and practical we will be using some concepts on the count measurement exercise
that would be covered in more details later.
So please be patient.
It will all come together to the end.
In the following exercise you will use various thoughts to limit the current flow in assemble Cirque.
This is a separate board or the brutal war.
This is simply a ball that you use to test electronic circuits.
You can place your elements here and connect ball then you can see how the circuit functioned before
building a more permanent prototype.
Brutus stands for prototyping.
You need to understand the difference between here.
The interconnected halls here as you can see each file false here alkalinity together horizontally not
vertically and the same is here.
These five are connected together so you can consider all of them as one.
Ben The same goes here and here while these two blue and red are called Bower rails so uh from here
to here to this bend.
This is the negative 11 well and from here to here.
This is the positive our will.
So a full blast.
Let's say an involved and down.
This is the ground wire and this is the line vault wire.
If we connect them here then all of these spins will get involved.
You can uh connect led to these bands and you can connect to wire and take ball from these spins while
the other bends here and that the vertical line uh are connected to ground.
So this is for connected to other circuit components uh here and here to our underground and it's a
really useful board as you can see uh.
Again the vertical rows in the center that have red and blue lines next to them are connected together.
The holes in the red row are connected together.
The holes in the plural are connected together.
The ball as Shaw are configured to have these raw as power sources red for both to undo foreground or
negative.
There are four black all of our four banks of horizontal rows.
As you can see here this is one bank.
Second bank failed.
And fourth one they are connected together.
The horizontal rows are aware of the components will be interconnected and the vertical center role
will be connected to the circuit bar to provide the other circuit element with board.
Now let's look at measuring current basic circuit.
As you can see here this is a disaster that we will use to limit talent so we won't damage our digital
multimeter.
And this is a battery a line will matter in that case.
And this is our Volt or meter that is connected through the circuit.
As you can see here this is the opposite of the terminal.
It's not connected directly to the resistor we cut the circuit and place the Volt on meter right in
the middle so that the current will bust through the Volt or meter.
Now let's look at the circuit and practice first current measurement.
Set up the circuit using 100 ohm resistors brown black brown.
You need to have 100 on the store like this one as you can see now connect our bulletin board source
and connect another world to the top end of that is a story as you can see this is the host of our source
and this is the negative one source we lost connect the first with the stone wire to the positive and
we must connect the other while our two are the other third one of that is a stop to our out then the
black terminal or the vault on meter we need to see the vault on meet our current skill to 200 million.
As you can see here two hundred million.
And we need to place that probe in the right place here in the million arm connector slot and the tin
connector without connecting the battery.
Barack this touching the vault on metal probes to the exposed wire ends.
You need to take some time to understand this example before going further.
Um now let's see.
Let's connect all battery and measure the current with the vault on me toss it to the 200 minute meter.
Really the current scale touch the black lead to the wire hooked to the high side of that is a store
didn't touch that it lead to the lead coming from the positive side of the battery nor the vault on
radar.
It will give you eighty nine point two and this is in MGS.
So the control I saw that was a store is eighty nine point two.
Now you need to understand that we got the reading in MG.
So if we wanted and arms it will be point 0 8 9 2 amps you must multiply that number by uh order divided
by 1000 to get that reading.
Now three locked here as you can see if we reverse the Volt or meter leads we cannot that the reading
became negative eighty eight point zero
um.
This is obvious since we reversed the two blobs.
We will get a negative reading now uh let's return to the fold on reads a Volt on probs to their original
position that it is connected to the battery change the Volt on current range is down and know that
simply reading what's the best range for measuring the current from a nine volt source through a hundred
on resistor.
You'll note that when you reach the 20 million range it will give you one.
And we did explain what one mean it means out of range.
Uh.
And you Miss uh must choose the right range while in 200 million range.
It gave eighty nine point two Now let's look and while the circuit with one killer on register brown
black red this is that resistor and measure current with 200 million brains.
Let's see the results.
What is this strange times out of control.
One kilo resistor as you can see in 200 million brands will give us zero on the left which means that
we can get a more ambitious year thing.
So if we switch it to to 20 million will give us nine point four four million.
And if we switch to 2000 Micron it will give us out of range.
So this is the best um let's say the best range for measuring you must uh test that for so uh to get
a clue how much control box and what is the best highest resolution uh scale.
Now as you can see here uh let's watch out.
That's it.
To do that in kill or on resistor brown black orange.
These are the three colors this measure of the current with uh 2000 micro brands.
As you can see uh give us nine hundred fifty five micro um these are uh different lab results.
Uh if we did another measurement uh as you can see that is strange for that intel on what the store
is that 2000 Micron since if we choose that 100 micron it will give us out of range now.
Another example let's say that this is our last example of this use of size using 100 kilometers a store.
Let's start uh 200 million.
Scale and read the current using each of the four ranges and record the result all this will be a good
opportunity to again go over converting current from two million amps to make rams and also this threat
how to remind them is strange for the current being measured.
As you can see in case of 100 kilometers a store brown black yellow.
If we start to do that 2000 merely told us give us zero point zero nine.
And going further out will give us the highest higher resolution depending on the range.
That's it for the practical bars for measuring calm.
Next we will be measuring the resistance.
Thanks for watching.
This is education and engineering team.