Excellent vid! Thanks for the High Side Switch circuit and explanation. I'll be using it to switch 12V On/Off to a Stepper Motor Drive Module as a Fail Safe Shutdown if/when the ESP32 gets 'Lost in Space'. Lots of good info in this vid. Good Job.......
This is one of the best you tube videos I have seen. I've spent hours trying to learn MOFSET's and I got more knowledge from your 17 minute video than the previous hours watching other channels. Great video and you are a great teacher. Thanks for the lesson.
Outstanding tutorial. I agree with several others that this top notch in terms of simplicity and clarity of explanation that gives the viewer sufficient understanding to use these devices in their own custom designs. Great job!
The P-channel high side driver circuits you showed are both supply voltage sensitive. The first (no zener) was good to about 20v, and the second (with zener) needs to have the zener changed for different supply voltages. Better to have a 12-15v zener across the gate and source, to do the protection right where it's needed, and then drive the gate via a resistor. The resistor will absorb the difference between the power supply and zener voltages, and can be a high value since it will carry only a small current. That way the circuit will work for any supply voltage up to the max for the MOSFET.
The resistor or resistor divider will drastically reduce MOS switching speed due to the usually high gate capacitance of the mosfet; Needs a capacitor divider in parallel with the resistor divider; and things become complicated also with tha fact that the transistor used to drive may not push'pull enough current to charge/discharge fast these capacitances
Links: Using the ULN2003A Transistor Array with Arduino Using the ULN2003A Transistor Array with Arduino www.bristolwatch.com/ele/uln2003a.htm ULN2003A Darlington Transistor Array with Circuit Examples ----- Using the TIP120 & TIP120 Darlington Transistors with Arduino Using the TIP120 & TIP120 Darlington Transistors with Arduino www.bristolwatch.com/ele/tr3.htm Tutorial Using TIP120 and TIP125 Power Darlington Transistors ----- Using Power MOSFETS with Arduino Using Power MOSFETS with Arduino www.bristolwatch.com/ele/tr2.htm N-Channel Power MOSFET Switching Tutorial www.bristolwatch.com/ele/tr1.htm P-Channel Power MOSFET Switch Tutorial ----- Using PNP Bipolar Transistors with Arduino, PIC Using PNP Bipolar Transistors with Arduino, PIC Using NPN Biploar Transistors with Arduino, PIC Using NPN Biploar Transistors with Arduino, PIC www.bristolwatch.com/ele/tr4.htm Understanding Bipolar Transistor Switches ----- How to build a Transistor H-Bridge for Arduino, PIC How to build a Transistor H-Bridge for Arduino, PIC www.bristolwatch.com/ele/tr5.htm Build a High Power Transistor H-Bridge Motor Control www.bristolwatch.com/ele/tr6.htm Driving 2N3055-MJ2955 Power Transistors with Darlington Transistors ----- Build a Power MOSFET H-Bridge for Arduino, PIC Build a Power MOSFET H-Bridge for Arduino, PIC www.bristolwatch.com/ele/h_bridge.htm H-Bridge Motor Control with Power MOSFETS www.bristolwatch.com/ele/tr7.htm More Power MOSFET H-Bridge Circuit Examples
Sir, I have to agree with the others that this video taught me a lot about MOSFTs and I thank you and am saving this link to my favorites tab ! I am going to look through your channel for other electronics material to teach myself with.
Dear Mr. Lewis Lofin the tutorial on MOSFETs are extreamely helpfull for me and for my projects, Pl accept my heartfelt thanks. Warm regards Murali Madupu. And also I thank you for up loading in You Tube.
Hmm... I use a more convoluted driving scheme, 'coz I need to drive the power MOSFETs in half-bridge configuration from 3.3V/0V pulses. So - a single 3.3V-ish NFET "inverter" driving the high side (the power PFET) and a combination of 3.3V-ish NFET and PFET "buffer" driving the low side (the power NFET) with a bunch of gate resistors, slowing the charging time of the gates (has to be calculated!) and a a bunch of discharging resistors. It works like a charm, permitting me to do all sort of crazy I and H configuration with a single polarity of 1/0 (on / off) driving signals, which makes the logic more uniform (FPGA wise / micro wise / CPU wise). Hope this helps. ('m a big fan of CMOS and not quite TTL logic) P.S. Do never forget the gate zenners ;)
Great info, love it! It looks like the currentflow in your diagrams are opposite the convetional currentflow wich is from plus to minus. Or am I misunderstanding it perhaps? It seems to be alot of confusion around currentflow, or at least in my mind.
Ok, I see. Electronflow is more intuitive for sure, but can be confusing in electronics especially when anode and cathode is involved. Keep up the good work
Hello sir, Can you help me for Dimming COB DC lamp with 28V 670mA? 1. TIP41C BJT [100V 6A 65W] it is getting to much hot. 2. IRF540 MOSFET[100V 30A 150W] it is not giving effective dimming Other Option is to use TIP120C BJT[60V 5A], IRF520 MOSFET[100V 10A] Which is best IC to use with 4N35 Optoisolator to dim DC with ARDUINO ?
I'm having to design my own solid state relay since I can't find any market items that can switch 72KW of DC power on and off, based upon control from the BMS for a bank of lithium ion batteries. AND, I had to order the MOSFET's from Europe since none of the usual suppliers in the US carry them.
Hi Lewis, I know this is an old video but it is still being used by beginners I'm sure. Are the IRF630 and IRF9630 good choices for an Arduino when conducting significant current? I can see at the 20mA for a LED it won't matter, but then you don't need to use a power MOSFET. The R(DS) is quoted at a VGS of 10V, indicating at 5v it would not be fully turned on. Unless you are using a logic level device, won't you need to use a gate driver to protect the Arduino (switching transient due to capacitance) and to fully turn on the MOSFET (at 10V in those above)? I guess a series gate resistor could be used if the capacitance is an issue. If the MOSFET were not fully turned on, wouldn't heat from R(DS) become an issue?
I heard on a science article 12-2-19. they are going to start using graphene or graphite instead of silicon in future chips . According to the scientist , It really has enhanced all characteristics of the chips and are far superior in all aspects than silicon! And of course they said the military will be the first to get the first generation released.
The resistor or resistor divider will drastically reduce MOS switching speed due to the usually high gate capacitance of the mosfet; Needs a capacitor divider in parallel with the resistor divider; and things become complicated also with tha fact that the transistor used to drive may not push'pull enough current to charge/discharge fast these capacitances
@@Asyss_Complex yes, the so-called "time constant" will be a good approximation: for example a 1 kiloohm on a 5nF gate capacitance will produce a delay of 1000 ohms x 5 nano = 5 microseonds; way too much, and I did not took into account the Miller effect wich will make it far worse. To obtain an effective voltage divider, use small resistors (example 10-20 ohms) and use a capacitor in paralel with series resistor, it's value to be invers proportional with dividing factor and direct with gate capacitance of the MOS. Example: driver voltage 25V, out voltage 6V: divide gate with 1/4, MOSFET have 5nF gate: results: series resistor to be 33 ohms, gate-to-gnd resistor 10 ohms, series cap to be ~1.5nF.
Thanks for the video Louis. Have you made a video going through a data sheet line by line? I know I would find it very helpful, as so many items on those sheets are very confusing. Videos like this are great for us new to electronics. Thanks
Some new pages: www.bristolwatch.com/ele/hysteresis.htm www.bristolwatch.com/ele2/comparator.htm www.bristolwatch.com/ele2/battery_charger.htm www.bristolwatch.com/ele/vc.htm www.bristolwatch.com/ele2/rotary.htm www.bristolwatch.com/ele2/therc.htm
I have a question I hope you can help me with. The N channel MOSFET with the LED that has a forward voltage drop of 1.8V I can see you included a resistor R1, what would the value of the resistor be in this case ?
interesting, i was sure p channel mosfet have the arrow pointing toward the gate and the n channel was pointing away from the gate only on mosfets. BJTs are opposite , n-channel points out away from the base. p-channel points in toward the base.
Would the fact that you have 12v on the P-channel, yet only 5v on the N-channel cause problems/an imbalance? Since I thought most mosfets were "barely" on at the threshold voltage. So you would end up with the P-channel well on and the N-channel only just on?
Mr. Lewis, I wish to operate 2 computer fans using Arduino PWM to control speed. They are 12v and .39ma each. A 2N222 transistor works for 1 fan, but can get very warm and is probably not adequate. Would you have a suggestion as to the proper way to do this.
i have dozens of N channel and P channel mosfet's rated at 55v & 75a and want to build a high current high voltage system "H-bridge" and i want to build my own Motor Driver for a humanoid Robot im putting together, now i was looking for advised on what im doing from someone like you, am i in the right path? based on the listed items? i know i have to do the math V=I/R or what not in order to find the right resistors and or capacitors but one question in mind is do i add the mosfet's rated voltage to come up with a total? and that will be my motor drivers rated voltage? and the same method applied to the mosfet's rated current/amps ? OR is their another formula that i should follow to come up with a desired rated voltage *& Amps for this system i want to end up with ?
so if each mosfet is rated 10v @10a does this mean i will end up adding up those v & a to get my total v & a? so in a H bridge setup i will end up with 40v @40a h bridge motor driver? so this means each side of the bridge will be good for 20v
can you elaborate on a example? im not following as far as current will split, you mean it wont be 40A but 20A ? is this per side of the bridge over all? and far as the voltage your saying it will stay the same as its rate per single mosfet so if all are 20v it will stay 20v after setup of h bridge? if so ok that makes cents' but if so how can the current go up from their original rate value say 10A each but in a h bridge config it wud be added up for a total new rate current?
I have a question you say in your video IRF630 And i looked about and they say the IRF needs a voltage of 10v and the IRL is 5 volt as a logic MOSFETS with Arduino, can you explain this as i want to stock up on say 100 mosfets i need to get the right ones circuitcrush.com/arduino/2017/06/02/logic-level-mosfets-irl-or-irf.html
Why when i simulate in proteus that same circuit, when i apply 5V the Vg it's 24V and when i apply 0V Vg it's 12V, don't understand, it's exceding the Vgs
I never use simulations I build these things with real parts. Simulators don't work on a lot of these circuits. The parts in the real world seldom match simulator settings. What MOSFETs are you using and what circuit in particular?
The actual current flow is electrons from negative to positive. They insisted on positive flow (+ to -), which was a mistake going back to Ben Franklin. So with an N-channel that is, electrons enter the source and leave through the drain. This corresponds to current flow in vacuum tubes from the negative cathode to the positive plate.
5 minutes, 24 seconds. There is no current moving from source to gate, regardless of the polarity. The gate is completely isolated from the source and the drain. The gate only inducing an opposite charge in the transistor, like a capacitor plate.
those symbols are pretty shit tbh if I was inventing them all over again I'd do a better job.. they're literally indecipherable and cryptic and impossible to tell apart at a glance :/
A good teacher gets it right . You sir are teaching it the opposite of right . 1.31 not pointing in ! Go left at the light . Means go LEFT at the lights . I know it’s ok stoner ! You meant right but said left anyway 😖🤬
Excellent vid!
Thanks for the High Side Switch circuit and explanation.
I'll be using it to switch 12V On/Off to a Stepper Motor Drive Module as a Fail Safe Shutdown if/when the ESP32 gets 'Lost in Space'.
Lots of good info in this vid.
Good Job.......
This is one of the best you tube videos I have seen. I've spent hours trying to learn MOFSET's and I got more knowledge from your 17 minute video than the previous hours watching other channels. Great video and you are a great teacher. Thanks for the lesson.
The water for tea is ready, by the sound of it.
underrated but accurate comment
I think he needs a low pass filter :P
Buuut it is a good overview on MOSFETs.
Outstanding tutorial. I agree with several others that this top notch in terms of simplicity and clarity of explanation that gives the viewer sufficient understanding to use these devices in their own custom designs. Great job!
WHAT AN EXCELLENT TEACHER! Thank you for this tutorial even I understood this detailed explanation. Great schematics and very fine video.
I agree. The best explanation on youtube about Mosfet.
I am currently designing a arduino battery backup switchover system and found your tutorial very handy ..
Excellent instructive video, crystal clear and clearly explained, you're a gifted teacher. Thx a lot!
The P-channel high side driver circuits you showed are both supply voltage sensitive. The first (no zener) was good to about 20v, and the second (with zener) needs to have the zener changed for different supply voltages.
Better to have a 12-15v zener across the gate and source, to do the protection right where it's needed, and then drive the gate via a resistor. The resistor will absorb the difference between the power supply and zener voltages, and can be a high value since it will carry only a small current. That way the circuit will work for any supply voltage up to the max for the MOSFET.
This is a tutorial MOSFETS and how they work. They work just as shown for the voltages used and I went into Vgs.
I'm not saying that your circuits don't work, just pointing out that there is a more flexible way to do it.
The resistor or resistor divider will drastically reduce MOS switching speed due to the usually high gate capacitance of the mosfet; Needs a capacitor divider in parallel with the resistor divider; and things become complicated also with tha fact that the transistor used to drive may not push'pull enough current to charge/discharge fast these capacitances
best video ive seen yet on mosfits thanks for taking the time to explain these very clearly (the penny has dropped)
Great Arduino based MOSFET video, thanks for the detail. Looking forward to your next video
Excellent, one of the best tut's I have seen on the subject.
Links:
Using the ULN2003A Transistor Array with Arduino
Using the ULN2003A Transistor Array with Arduino
www.bristolwatch.com/ele/uln2003a.htm
ULN2003A Darlington Transistor Array with Circuit Examples
-----
Using the TIP120 & TIP120 Darlington Transistors with Arduino
Using the TIP120 & TIP120 Darlington Transistors with Arduino
www.bristolwatch.com/ele/tr3.htm
Tutorial Using TIP120 and TIP125 Power Darlington Transistors
-----
Using Power MOSFETS with Arduino
Using Power MOSFETS with Arduino
www.bristolwatch.com/ele/tr2.htm
N-Channel Power MOSFET Switching Tutorial
www.bristolwatch.com/ele/tr1.htm
P-Channel Power MOSFET Switch Tutorial
-----
Using PNP Bipolar Transistors with Arduino, PIC
Using PNP Bipolar Transistors with Arduino, PIC
Using NPN Biploar Transistors with Arduino, PIC
Using NPN Biploar Transistors with Arduino, PIC
www.bristolwatch.com/ele/tr4.htm
Understanding Bipolar Transistor Switches
-----
How to build a Transistor H-Bridge for Arduino, PIC
How to build a Transistor H-Bridge for Arduino, PIC
www.bristolwatch.com/ele/tr5.htm
Build a High Power Transistor H-Bridge Motor Control
www.bristolwatch.com/ele/tr6.htm
Driving 2N3055-MJ2955 Power Transistors with Darlington Transistors
-----
Build a Power MOSFET H-Bridge for Arduino, PIC
Build a Power MOSFET H-Bridge for Arduino, PIC
www.bristolwatch.com/ele/h_bridge.htm
H-Bridge Motor Control with Power MOSFETS
www.bristolwatch.com/ele/tr7.htm
More Power MOSFET H-Bridge Circuit Examples
Thank you very much for this quality video explanation and the links.
Sir, I have to agree with the others that this video taught me a lot about MOSFTs and I thank you and am saving this link to my favorites tab ! I am going to look through your channel for other electronics material to teach myself with.
Thank you for simple explanation of how to use Power MOSFETs
N-Channel Power MOSFET Switching Tutorial
www.bristolwatch.com/ele/tr2.htm
P-Channel Power MOSFET Switch Tutorial
www.bristolwatch.com/ele/tr1.htm
Damn, had to end up on ur tuto to finally understand a basic functionality of the PMOS😁😎
This is a great video. Thanks so much for making and sharing it!
OH this was pretty much exactly what i wanted to learn right after watching something about mosfets! youtube gets really good at reading minds :D
Dear Mr. Lewis Lofin the tutorial on MOSFETs are extreamely helpfull for me and for my projects, Pl accept my heartfelt thanks.
Warm regards Murali Madupu. And also I thank you for up loading in You Tube.
Thank you.
Can somebody please explain to me what is the need of q5 & q6 transistor in 14:30
Again, to isolate the 12V from the 5V Arduino.
Hmm... I use a more convoluted driving scheme, 'coz I need to drive the power MOSFETs in half-bridge configuration from 3.3V/0V pulses. So - a single 3.3V-ish NFET "inverter" driving the high side (the power PFET) and a combination of 3.3V-ish NFET and PFET "buffer" driving the low side (the power NFET) with a bunch of gate resistors, slowing the charging time of the gates (has to be calculated!) and a a bunch of discharging resistors. It works like a charm, permitting me to do all sort of crazy I and H configuration with a single polarity of 1/0 (on / off) driving signals, which makes the logic more uniform (FPGA wise / micro wise / CPU wise). Hope this helps. ('m a big fan of CMOS and not quite TTL logic)
P.S. Do never forget the gate zenners ;)
Great info, love it! It looks like the currentflow in your diagrams are opposite the convetional currentflow wich is from plus to minus. Or am I misunderstanding it perhaps? It seems to be alot of confusion around currentflow, or at least in my mind.
No I used electron flow which is what we use in the military when I was in. I'm going to redo this with conventional flow.
Ok, I see. Electronflow is more intuitive for sure, but can be confusing in electronics especially when anode and cathode is involved. Keep up the good work
Excellent Respectable Sir
Hello sir,
Can you help me for Dimming COB DC lamp with 28V 670mA?
1. TIP41C BJT [100V 6A 65W] it is getting to much hot.
2. IRF540 MOSFET[100V 30A 150W] it is not giving effective dimming
Other Option is to use TIP120C BJT[60V 5A], IRF520 MOSFET[100V 10A]
Which is best IC to use with 4N35 Optoisolator to dim DC with ARDUINO ?
clear and to the point well worth the time
Lewis Thanks alot for your videos. Much Appreciated.
Good Tutor.Easy listening.
I'm having to design my own solid state relay since I can't find any market items that can switch 72KW of DC power on and off, based upon control from the BMS for a bank of lithium ion batteries. AND, I had to order the MOSFET's from Europe since none of the usual suppliers in the US carry them.
Thanks! very professional video - just what I needed.
Hi Lewis, I know this is an old video but it is still being used by beginners I'm sure.
Are the IRF630 and IRF9630 good choices for an Arduino when conducting significant current? I can see at the 20mA for a LED it won't matter, but then you don't need to use a power MOSFET.
The R(DS) is quoted at a VGS of 10V, indicating at 5v it would not be fully turned on. Unless you are using a logic level device, won't you need to use a gate driver to protect the Arduino (switching transient due to capacitance) and to fully turn on the MOSFET (at 10V in those above)? I guess a series gate resistor could be used if the capacitance is an issue. If the MOSFET were not fully turned on, wouldn't heat from R(DS) become an issue?
See the following updated page for better MOSFETs:
www.bristolwatch.com/ele/h_bridge.htm
I heard on a science article 12-2-19. they are going to start using graphene or graphite instead of silicon in future chips . According to the scientist , It really has enhanced all characteristics of the chips and are far superior in all aspects than silicon! And of course they said the military will be the first to get the first generation released.
You don"t need a zener diode to limit the gate voltage of the p-channel mosfet.
You can just use another resistor to create voltage divider.
The resistor or resistor divider will drastically reduce MOS switching speed due to the usually high gate capacitance of the mosfet; Needs a capacitor divider in parallel with the resistor divider; and things become complicated also with tha fact that the transistor used to drive may not push'pull enough current to charge/discharge fast these capacitances
@@addysoftware So that means that a voltage divider will slow down the switching speed of the mosfet? If so, is there a way to know by how much?
@@Asyss_Complex yes, the so-called "time constant" will be a good approximation: for example a 1 kiloohm on a 5nF gate capacitance will produce a delay of 1000 ohms x 5 nano = 5 microseonds; way too much, and I did not took into account the Miller effect wich will make it far worse. To obtain an effective voltage divider, use small resistors (example 10-20 ohms) and use a capacitor in paralel with series resistor, it's value to be invers proportional with dividing factor and direct with gate capacitance of the MOS. Example: driver voltage 25V, out voltage 6V: divide gate with 1/4, MOSFET have 5nF gate: results: series resistor to be 33 ohms, gate-to-gnd resistor 10 ohms, series cap to be ~1.5nF.
Thanks for the video Louis. Have you made a video going through a data sheet line by line? I know I would find it very helpful, as so many items on those sheets are very confusing. Videos like this are great for us new to electronics. Thanks
As usual great explanation . thank you
Some new pages:
www.bristolwatch.com/ele/hysteresis.htm
www.bristolwatch.com/ele2/comparator.htm
www.bristolwatch.com/ele2/battery_charger.htm
www.bristolwatch.com/ele/vc.htm
www.bristolwatch.com/ele2/rotary.htm
www.bristolwatch.com/ele2/therc.htm
Exellect explanation........ need a video on Amplifier based FET.... how FET works in Amplifier ...🙏
I'll try to do one.
@@LewisLoflin 🙏
Very good job sir thank you sir
I have a 650v ups and its use IRLB4132 mosfet. But I can not find this mosfet in local maket please tell me a alternative mosfet of IRLB4132.
Very good tutorial.
I have a question I hope you can help me with. The N channel MOSFET with the LED that has a forward voltage drop of 1.8V I can see you included a resistor R1, what would the value of the resistor be in this case ?
Depends on the current through the LED. Let's assume 20mA so 10.2/0.02 = 510 ohms.
interesting, i was sure p channel mosfet have the arrow pointing toward the gate and the n channel was pointing away from the gate only on mosfets. BJTs are opposite , n-channel points out away from the base. p-channel points in toward the base.
Arrows point towards the N material because under conventional current flow it flows from positive to negative.
Would the fact that you have 12v on the P-channel, yet only 5v on the N-channel cause problems/an imbalance? Since I thought most mosfets were "barely" on at the threshold voltage. So you would end up with the P-channel well on and the N-channel only just on?
Never had a problem and the MOSFETs are voltage not current operated. That might not be true with other MOSFETs. Thanks.
I wish to use MOSFETS , as ECU (electronic control unit) as Motor ,and work with
For an up to date view of MOSFETs that operate better see:
www.bristolwatch.com/ele/h_bridge.htm
Ty .. I was looking for why some are OFF or ON without Gate voltage .
Can I use it for 12v Ws2811 strip?
Is possible to use just irfz44n mosfet in h bridge?
great work
excellent tutorial. thx a lot
Mr. Lewis, I wish to operate 2 computer fans using Arduino PWM to control speed. They are 12v and .39ma each. A 2N222 transistor works for 1 fan, but can get very warm and is probably not adequate. Would you have a suggestion as to the proper way to do this.
Danny Johnston Use a TIP41 a nd use a 1K resistor.
I had a TIP31 and it seems to work good. Thanks
very good
Why not you use voltage divider instead of zener?
Would this work with PWM?
Yes.
Thank you very much!
Bravo!!! clap, clap, clap, clap...
i have dozens of N channel and P channel mosfet's rated at 55v & 75a and want to build a high current high voltage system "H-bridge" and i want to build my own Motor Driver for a humanoid Robot im putting together, now i was looking for advised on what im doing from someone like you, am i in the right path? based on the listed items? i know i have to do the math V=I/R or what not in order to find the right resistors and or capacitors but one question in mind is do i add the mosfet's rated voltage to come up with a total? and that will be my motor drivers rated voltage? and the same method applied to the mosfet's rated current/amps ? OR is their another formula that i should follow to come up with a desired rated voltage *& Amps for this system i want to end up with ?
Frank Lopez MOSFETs can be wired in parallel - G-G, D-D, S-S for higher current.
so if each mosfet is rated 10v @10a does this mean i will end up adding up those v & a to get my total v & a? so in a H bridge setup i will end up with 40v @40a h bridge motor driver? so this means each side of the bridge will be good for 20v
No the voltage stays the same bit the current will split.
can you elaborate on a example? im not following as far as current will split, you mean it wont be 40A but 20A ? is this per side of the bridge over all?
and far as the voltage your saying it will stay the same as its rate per single mosfet so if all are 20v it will stay 20v after setup of h bridge? if so ok that makes cents'
but if so how can the current go up from their original rate value say 10A each but in a h bridge config it wud be added up for a total new rate current?
The current will add voltage the same. Don't push this to near the limit.
I have a question you say in your video IRF630 And i looked about and they say the IRF needs a voltage of 10v and the IRL is 5 volt as a logic MOSFETS with Arduino, can you explain this as i want to stock up on say 100 mosfets i need to get the right ones
circuitcrush.com/arduino/2017/06/02/logic-level-mosfets-irl-or-irf.html
Works fine on 5 volts. I actually built the circuit. I'll run another test to be sure.
I checked it out it turns on at 4V. If you are using a 3 volt Arduino it will not work. That's why I always use 5 volt controllers.
Why when i simulate in proteus that same circuit, when i apply 5V the Vg it's 24V and when i apply 0V Vg it's 12V, don't understand, it's exceding the Vgs
I never use simulations I build these things with real parts. Simulators don't work on a lot of these circuits. The parts in the real world seldom match simulator settings. What MOSFETs are you using and what circuit in particular?
thank u sir
run this at 1.5x speed
FOCUS
(in 2023) still wonder why they call Source at the terminal that the current Drains off from the mosfet
The actual current flow is electrons from negative to positive. They insisted on positive flow (+ to -), which was a mistake going back to Ben Franklin. So with an N-channel that is, electrons enter the source and leave through the drain. This corresponds to current flow in vacuum
tubes from the negative cathode to the positive plate.
What's with the focus????? Cameras do have an auto focus you know.
Check your computer.
please remove audio noise.
5 minutes, 24 seconds.
There is no current moving from source to gate, regardless of the polarity. The gate is completely isolated from the source and the drain. The gate only inducing an opposite charge in the transistor, like a capacitor plate.
Yes I said that. That is why we have a gate discharge resistor.
@@LewisLoflin ok. I have great respect for you. It just sounded confusing to me.
@@yoramalon5273 You point is well taken and I will work harder on the next video to keep that in mind. Thanks.
What if I need to drive 220V load with PNP transistor and opto? Thank you!
Use a solid state DC relay.
If you can draw a simple schematic and send me on e-mail, that would help a lot. My E-mail is SotnikovSergey@mail.ru Thank you!
Look here for a list: www.bristolwatch.com/index.htm
Just a tip: *_watch the the video at 1.5x speed for better time saving!_*
Verdrehte Welt Netzwerk
those symbols are pretty shit tbh if I was inventing them all over again I'd do a better job.. they're literally indecipherable and cryptic and impossible to tell apart at a glance :/
A good teacher gets it right . You sir are teaching it the opposite of right . 1.31 not pointing in ! Go left at the light . Means go LEFT at the lights . I know it’s ok stoner ! You meant right but said left anyway 😖🤬
idiot, pointing to the N, not pointing to the in. N as in N material../facepalm