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okay this video is going to be a
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supplemental video on the blog post on
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the website on mosfets entitled
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understanding mosfets key Concepts and
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practical examples I'll leave a link
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down in the description below to that
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reading material if you're interested
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what I have you zoomed in on here uh as
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you can see it's a breadboard uh with a
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circuit on it and it's the same circuit
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setup that you can see here
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and that circuit like I said is the
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exact same circuit uh on the example
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switch application for this particular
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mosfet that we did on that post again
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I'll leave the link down in the
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description below and it also has the
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schematic that you can find there as
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well if I tilt this up we can just
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briefly go over that setup here
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I have a 9volt battery supply here and
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its terminals go to the power rail here
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of the breadboard we have the positive
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Supply with the red wire and the
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negative Supply with the black wire if
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we follow down the positive Supply we
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reach this yellow jumper wire which is
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in line with this yellow jumper wire
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which is in line with the anode lead of
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the green LED and then the cathode lead
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of the green LED goes to the drain of
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mosfet if we look at the center lead of
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the mosfet that is the gate and in line
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with the gate if I tilt up here and try
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to move some of this stuff around so we
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can see better we can see that there's
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this resistor here it's lead is in line
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with the gate and then we have this
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resistor here which is in line with this
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green jumper wire which goes to the Nega
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Supply uh or the negative power supply
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this is the 500 Ohm resistor that we
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example this happens to be a 560 Ohm
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resistor because I don't have a 500 Ohm
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resistor so I'm using a 560 Ohm resistor
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for this setup here just for
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demonstration purposes but in the
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calculations we did we calculated for a
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500 Ohm resistor and that's for this one
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schematic right here is this other
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resistor this is considered resistor R1
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in the schematic and this is the 1K Ohm
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resistor and it's again both of these
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resistors are in line with the gate lead
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mosfet looking back at the 1K Ohm
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resistor it's other lead is in line with
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this push button switch and the other
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lead of this push button switch is in
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line with this yellow jumper wire which
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is in line with this yellow jumper wire
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which is attached to the positive rail
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of the positive Supply looking back
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towards the uh Source lead of the mosfet
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in line with that lead is this other
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resistor and this is the 200 Ohm
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resistor and this is considered resistor
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R3 in the schematic and it's in line
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with this green jumper wire which goes
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so again this was for the switch
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application uh example in the blog post
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and if I were to press the button here
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we'll see that the green LED lights
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up you can see it lit up right there and
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this is all controlled thanks to
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this in Channel enhancement mode mosfit
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again enhancement mode means that it's
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normally off so if I'm not pressing the
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button the LED is off and nothing's
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happening if I press the button the LED
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comes on all that's explained in that uh
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blog post again that I mentioned that I
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going to leave that link down in the
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description below but you can follow
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along on that reading material and set
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up your own uh circuit just like this
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one for the switch application using the
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mosfet uh Before I Let You Go I also
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wanted to go over like we
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did in that example where we used a
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multimeter to take a reading across
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resistor R1 the 1K resistor and we read
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a voltage of 6 volts I just wanted to
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demonstrate that real quick so I will
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out again if you haven't read that blog
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post this might not make a lot of sense
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right now so I encourage you to check
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along with this example circuit and
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everything would become much clearer to
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that so like I said I'm just just going
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to uh do exactly like we did in that
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example circuit where we wanted to make
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a reading across that 1K Ohm
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resistor resistor R1 in the circuit and
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example in theory we were to get 6 volts
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now I probably won't get the exact
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voltage reading here but it should be
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fairly close and I'm going to use this
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a makeshift finger here because I don't
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want to get my hand in the way and I'm
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going to press down we see the LED light
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up and we are getting a reading of about
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volts again I'm not going to get an
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exact reading as we did in the example
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the example gave a reading of six volts
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demonstrate that part of the example in
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post uh where we needed to figure out uh
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R2 and that's this resistor here and we
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calculated it to be 500 ohms again
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excuse me it's this other resistor over
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here uh again we calculated it to be 500
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ohms and I ended up having to use a 560
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oh resistor because I don't have a 500
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resistor but I just wanted to show you
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that real quick and kind of go over the
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the circuit here and share that with you
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so I hope that you go check
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post understanding mosfets key Concepts
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examples I'll leave all that information
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that you need for that down in the
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description below and I'll leave you
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of pressing the button and watching the
