What Is Schmitt Trigger and How It Works

[@victorjbarker]

THANK YOU VERY MUCH ! Haven't studied some of this stuff since electronics classes in high school...You have great graphics and to the point explanations.

[@Brian-mf3ry]

High school????? Lucky I didnt learn this until college

[@victorjbarker]

@@Brian-mf3ry we had optional tech center classes available to us in the 1980's. It was way more interesting than some of the other normal electives. It was a 2 year program and since both of the electronics course teachers we also instructors at the the Grand Rapids community college and taught the same curriculum for the electronics technology associates degree they set it up to allow us to be able to test out of the two-year program in college if we completed the tech center 2 year course. Sadly the program and facility are now defunct

[@rishitak7419]

Awesome Explanation Within 5mins. As perfect as it could be.

[@thecoinmagician]

I think your really talented you guys who understand electronics to the level where you understand exactly how circuits work.like this.

[@mattarcarese6136]

Thanks a lot. Your videos help a lot for homework assignments, lab reports and lab work. You're beyond awesome.

[@HowToMechatronics]

Happy to hear that!

[@marekkowalski6767]

B​@@HowToMechatronics 👍 tnx 🇵🇱 Warsaw Poland.

[@shazmiah]

Hi Dejan, your videos are very clear, educative and highly illustrative. I was going to point out the mistake your last formula (because R1 and R2 are clearly in parallel since they both connect to 5V). But then I noticed nagarjun rao correcting it

[@zaidahmed7234]

highly appreciated

[@Fernando-me2ie]

Good catch

[@SilentMover95]

I understood more in 6 minutes than 1 and a half hour in the lecture hall. Thanks,dude.

[@fanBladeOne]

Thanks a lot! I have a teacher that literally says we should look it all up ourselves so this was very informative. Thanks!

[@mikemallano2484]

And, that is "teaching"? Wow, he wouldn't be working for me long....

[@Ramy_Ramz]

Hahaha me too, do we have the same lecturer? 😅

[@kalef1234]

My circuit Analysis Lab is literally using your slides....thanks haha

[@misteredron]

I usually see schmitt triggers in the positive feedback inverting configuration. The circuit here is using positive non-inverting configuration. I'm not sure if it will work. Also, I think that using virtual short concept in your equation (Va=0) is not valid because this only exist in negative feedback configurtion.

[@adilmohammed6897]

you are correct. thanks for pointing it out as i went in a rabbithole to understand it. the formula gain = -rf/r is probably applicable only in negative feedback cases where the output is stable. here its positive feedback and output is always +12 or -12v due to regeneration so i am assuming theres no such thing as a formula for gain. in negative feedback theres degeneration so theres virtual shorting there

[@AnthonyFrancisJones]

Excellent! Thanks for making this!

[@davidmacfarlane4761]

Wow, I am impressed so with this video, I am liking and subscribing to your channel! I love channels like this and Organic Chemistry Tutor.

[@deadpenguinss]

If I'm not mistaken, that last formula you displayed (where Vout = 5V) is wrong. The formula to calculate Va should be Va = [R3 / (R3 + R1 || R2)]*Vref. Since all the resistors are the same value the answer you got is correct, but your approach was not.

[@nagarjunrao7428]

Yes you are right

[@MrReRaRo]

yeah. ohms law.

[@Fantasygeek37]

|| means what in that formula

[@TinyWords]

|| means "in parallel with". For example, R1 || R2 is asking for the resistance of two resistors, R1 and R2 connected in parallel. R1 || R2 = (R1 * R2) / (R1 + R2)

[@vman049]

From what I learned in college, resistors that are in parallel share both nodes. Why, in the first of the last two examples, are R2 and R3 in parallel?

[@fawadmirza.]

Better than my professor!

[@mohammadhosein77]

3:07 Va is not zero , cause we don't have negative feedback here.

[@rakesanand1]

well explained, understood in one go.thank you

[@Electronzap]

Very good video!

[@ThuanDuong-pv3xu]

easily to understand it, using a 555 ic (vcc=12v) the trigger is Low threshold (pin2_Vcc/3) High threshold (pin6_2/3Vcc)

[@agstechnicalsupport]

Great explanation for Schmitt Triggers.

[@shivnnarasareddy8335]

Nice explained

[@shreyashukla4659]

Great Video !! Explained really well .

[@culture101]

If it's from the non-inverting input why the minus sign when dividing R1 and R2 in the Vin equation? I find it a bit confusing because the minus sign is also been used to calculate the gain of an inverting input.

[@culture101]

When I rearrange the equation to calculate Vout the minus disappears.

[@ccv3237]

Great video, thanks a lot.

[@AmsSma]

Excellent video, congratilations..

[@ВікторШевченко-и6э]

Useful Information,thanks!

[@HowToMechatronics]

Thanks!

[@rolandosalgado1552]

Thanks for share ,very educative 👌

[@69iqtutorial]

Can you make an inverting one also

[@maysamqassim]

can I use Schmitt Trigger if I have sine wave I/P to get square wave?

[@MNGN101]

Very clear and simple explanation. Thanks!

[@FutureAIDev2015]

How would I design a circuit that integrates input current and outputs spikes when the voltage exceeds a threshold?

[@harshasamagara9279]

which software do you use for circuit design in this video?

[@MsEDUARDOCR7]

Excellente video!!!

[@kolinevans9127]

great explanation thanks.

[@HowToMechatronics]

Thanks!

[@christopherllorente3989]

Your Va formula for non-symmetrical inverted schmmit trigger is incorrect. It should be = [(R3)/((R1||R2) + R3)]*Vref. You just got the right answer because all 3 resistors have the same value.

[@Oshyrath]

Question, what values do I set for Vcc and Vee?

[@ThuanDuong-pv3xu]

great! thank for your good knowledge!

[@AbdullahAlmarhon]

Keep going, nice video

[@elias19]

why dont you apply the formula Vin=(R1/R2)Vout? How do you know that the opam is satturated already? I mean, the relation beteween Vo and Vin according to Vin=(R1/R2)Vout is linear. You make it looks like pulse function and its not. Please explain it to me.

[@k.chriscaldwell4141]

Good stuff. Thanks.

[@shazmiah]

hi. should the 2nd equation when Vout =5volts be R3/R1|| R2 + R3?

[@shazmiah]

sorry it should be R3/(R1||R2)+R3 × Vref

[@farabielec]

Thank you 👍

[@kaleemullahrafiq3297]

very good lecture thanks sir

[@basilkumi]

Hello sir and thank you for your very informative videos. I have a question for you: I would like to make a circuit that can give me a rectangular signal between 0V and 5 V. A kind of switch, but with a smaller rise time in the order of 50ns to 100ns. I tried with the Mosfets, but the output siganl to a lot of swings and noises. What you can advise me or have already made a circuit like that. I like to test the filters placed at the retraction of a microcontroller by placing this signal recregular and read the response of the filter. Thank you

[@nalindakahettiarachchi8807]

were you able to find the answer to this?

[@ivanandric78]

Can you describe Schmitt Trigger with NE555 used?

[@TimpBizkit]

I'm looking for how to design a single pole double throw switch that switches one way above a higher voltage and the other way below a lower voltage. I want it to switch between a capacitor and a shorting wire to control a generator powered by a falling weight. It would be fun to make a weight driven radio or phone charger but a low power load would make the generator spin faster and a high load make it slow if I connected it directly. The plan is to run the load off of some power capacitor, and have the generator charge the capacitor in parallel, but then disconnect and be shorted out when the capacitor reaches a higher voltage, let's say 5.5 volts in the case of phone charging. Then when the phone has siphoned enough from the capacitor that its voltage has dropped to 4.5 or maybe 4.8 volts, disconnect the shorting wire and reconnect the capacitor. My thinking is the generator will slow down on the shorting wire, and then speed up when connected across the capacitor until it is charged to the desired level and switched out of circuit again. I am unsure of how the old Freeplay spring driven radios worked (before they switched to battery storage) but when the radio was at moderate levels, the generator would rev up a bit and then slow down again in pulses, which is the behaviour predicted from the circuit above e.g. charging a capacitor and then shorting the generator (with the capacitor disconnected from it) to slow the release of wind when the radio had enough power. Turning up the volume louder caused the radio to unwind in longer pulses until it was steady and fast, leading me to believe the capacitor was never switched out due to the power demand of the loud radio. If the radio was turned off completely, then it unwound slowly, leading me to believe the capacitor was fully charged and the generator was on the shorting wire. Also holding the winder still caused the radio to fade out like it was on a capacitor of some sort. I couldn't find the exact circuit that was responsible though.

[@yourajbadgujar7837]

que- if output of only 1khz is needed between frequency range 400hz-3000hz, which type of circuit is useful.

[@abdelazeemhassan3701]

Amazing

[@octaviobermudez7426]

for gain , do you need plu rf/r1 +1? im right

[@snaprollinpitts]

thank you, very good explanation!!! and a sub from me!!!

[@RahulGupta-jk2]

thank you very much sir

[@tmc200527]

Great presentation. May I ask what software you use to produce the graphics in your tutorials?

[@yoramstein]

Did you get answer to your question ? I am also intrested.

[@achrafbara8025]

thank you for all (y)

[@LostInLeiden]

nice, thanks!

[@marcosefini3441]

I think that both the formulas for the Non-Symmetrical one are wrong.

[@Fantasygeek37]

|| means what? in that formule

[@TinyWords]

|| means "in parallel with". For example, R1 || R2 is asking for the resistance of two resistors, R1 and R2 connected in parallel. R1 || R2 = (R1 x R2) / (R1 + R2)

[@ctheart8833]

Can any one show me ho to calculate upper and lower threshold for Non-Symmetrical Schmitt Trigger with an example . I am not able to get 1.66 and 3.33 volt in my calculation . Thank you

[@mworld]

came to learn about the Schmitt Trigger I.C., got a lesson about op amps :(

[@manofmesopotamia7602]

I believe if you apply this on a breadboard using DMM will be more professional

[@phasorsystems6873]

Can't pay for conventional circuit simulators? Type androidcircuitsolver on google

[@ElPsyKongroo]

why is V at A 0 in the first one?

[@ramyam7013]

HERNIAK the reference voltage is 0, and output will switch when Va is equal to reference voltage that is 0

[@Mauijan011478]

this explanation is very confusing. seach youtube for schmitt trigger (6) and get a less onfusing explanation....

[@RobNO]

THANK YOU

[@RobNO]

nice Defender 90 TD5 btw

[@fathimahi4630]

thank you

[@HARIkRISHNA-wj6sh]

I like your accent

[@qwerty_____146]

Thanks.

[@debajyotibiswas6370]

why Va will be 0?

[@subham6340]

cause of virtual ground

[@lulululu4912]

Excellent video but just, PLEASE manage your tendancy to add "UHHHH" because once I ear it, it's impossible to EAR-ASE it with ease!

[@robbocop33r12]

A bit unfair,try doing a video in Russian(or any foreign language to you),then see how many 'uuhhh,s' you do before you attempt a sentence in a foreign language!!

[@rockirol1]

Hello my name is Gatis Kandis

[@gagatrozz]

thx

[@MrReRaRo]

remember the triangle

[@MrReRaRo]

makes sense.

[@bhuvaneswarisankuri6378]

Why background music🤦‍♀️

[@cristianfernandoromerovill1958]

Nice :)

[@broski6049]

this guy sounds like a robot

[@gustavgnoettgen]

A JA/NEIN gate. Obviously made from germanium.

[@manideepsaipolavarapu272]

i like youj

[@Cassius609]

This intro kills my ears

[@mohammadhosein77]

You should delete this video for misinformation

[@ArpadVarju]

If you can say Hysteresis than you can say "how" and "have". It begins with the same letter H. Pls don´t say CHOW and CHAVE plsplspl

[@abhishek2666]

Bhai aap totle ho kya 🤔

[@darrenclark6552]

Pity the voice sounds like a darlek.

[@dolonghanty3854]

Your pronunciation is dangerous,first correct your prounciation

[@prat1024]

says the idiot who makes spelling mistakes himself..

[@ahmadmusnansyah5662]

Great explanation thanks