2:50 I’ve watched so many videos and never understood transistors, and these 30 seconds explained it to me better than anyone else ever could (I’ve worded this comment funny, haven’t I?)
Mr Awesome Yes. I still don't understand. Maybe I should just watch other tutorial videos first before I spend my time repeating this one until I understand it.. Maybe the problem is the video and not me being unable to understand it.
Nice explanation. Im glad someone is actually putting things into laymans terms. Thats basically the same way i learned about transistors, Except in my case i learned it was basically a miniturised version of a relay used in general automotive applications.
Oh mahhhh gaasssshhh💥💥❤❤❤❤❤❤❤❤❤❤❤i love youu so much!!!!! Have my physics exam tomorrow and I've studied and have understood all concepts in the syllabus except electronics MAINLY TRANSISTORS. Now I've finally understood through this explanation!.....YOU ARE A LEGEND!!!!❤❤❤❤
Comment 345 A good teacher is one who makes a complicated and difficult concept simple for the student. Obviously you are one, Best Wishes from Singapore.
Hello, you might get this question very many times so I'd suggest putting that source you mentioned, in the description so that you won't get that question asked on everyone of your future videos.
From 2:00 even the simulation shows no current from Collector to Emitter and nor should there be. The LED is just in series between the two cells. Circuit at 2:35 fixes this.
james solarz Yes. I'm trying to learn this too. I will have to repeat this at least twenty times. But I suspect certain things were left out of this explanation of what a transistor is and how it works. I'll eventually learn it. If not from this video source then from a better tutorial I will find....
I finally get it. Sounds like the same operation of an old school control relay activated by applying voltage to the coil thus operating the relay contacts into the desired state to either pass or restrict current flow.
How can a small 3.3v supply a 12v? It just can? Or it could turn on the path to the higher voltage because the 0.7 is psssed? Or there's no explanation?(mostly in our school there's no explanation as to why these components work)
One thing confusing for me is that some of these videos show the electron flow and some show conventional flow for demonstrating the direction of the current in the circuit. It seems this video is backwards, it shows current moving from positive to negative, when in reality the electrons move from negative to positive, which can be observed in other videos from this channel. Its making it a bit harder to conceptualize trying to reverse it in my head.
This is very clear and high skilled explanation. You can’t find in most of the higher education colleges. Thanks sir, but I have a question about voltage level being applied directly to base of a transistor without voltage divider. I thought only a voltage of about 0.7 volts can be applied directly to base. Now in the above circuit we have 3.3V, is that level to high and can damage the transistor junction?
@@sonic-dna7742 /vickas sharma, it's called " everycircuit " you can buy it on google play for like $10 bucks. also If you get it I reccomend " electrodroid plus " also about $10 bucks. but comes with an abundance of useful tools. bolth apps can be a pain in the ass and confusing at times, basic circuit knowledge is a must for dealing with either
thank you for your episode 22, it very clear to understand. can you tell us which component used for on and off the LED and the link episode used. many thanks.
Help this old military electronics technician understand something: Electricity is the flow of electrons, negatively charged particles. They flow AWAY FROM negative and towards positive. It's intuitive to portray electricity then as flowing clockwise through both branches. The emitters of the transistor is drawn in such a way as to indicate electron movement through it resembles easy going over a ramp; same/same w/the LED.
Max Warfield Complete noob here. This is a good example of what, I'm not quite sure I understand, see, often you'll see an NPN BJT with that little arrow pointing away from the emitter, right? But the direction of the arrow of the collector isn't shown [tho we know, it is pointing away from the collector - NPN = Never Pointing iN]. So, my question is: HOW does current travel in the opposite direction of the "imaginary" arrow of the collector, when the current at the base, allows it? It's my understanding that current can only travel one way, in a diode, an NOT the other. And, a BJT is basically 2 diodes back to back, right? So, please explain this to me, I want to learn. Great video - make more. Cheers!
Great video I just liked and subscribed. Question I have is within the video and working diagram at about a 1:45 min mark, the diagram is showing the current flowing away from the collector. Is this how the top 3.3V circuit is completed? I am not following/understanding the visual motion here. I would have thought that the current would go into the collector and then out through the emitter. Is this not the case? It also seems odd that the direction the simulation emulates the current , I was always taught that, contrary to what you would think, current/electrons travel from Negative to Positive.
Cant we use a one power source to power both transistor and LED. ? Use one wire with a resistor to power transistor and one wire to power led or motor?
The first diagram shows current flowing out of the transistor collector back to the 3.3v power supply and out of the emitter to the 3v power supply but in the video it says that the current goes from the led through the transistor back to the 3v power supply. I thought when the transistor is turned on that current only goes one way through it? The way it’s drawn out in the second diagram makes sense to me but the first one has me confused...can anyone help me understand a little more please?
Hello . Why, for example, in an npn transistor, due to the existence of a diode between the base and the collector and the base and the emitter, but the diode of the base-collector is in the opposite state and against the current from the collector to the emitter, and practically no current should flow, so why does the current flow
Little summary of this video : Transistors are semi-conductor devices which means that they either allow current to pass through them or block current passing through them. By default transistors are non conductive but if we apply a power supply above the transistor, current can flow because the transistor has been turned to its conductive way. Now if you turns the another power supply off you will notice that the circuit is not able to produce current because the transistor is not being applied from the power supply. Without transistors we wouldn't have the luxury of having computers. In fact transistors are very useful for switching on and off at very fast speeds (millions of times a second). Computers contains billions of transistors. Computers encode them as binary data (zero and ones represent on and off). Due to the fact that the transistor can switch at very fast speeds and computers use them as instructions, it gives us many advantages for controlling many devices such as led or motors enabling us to vary the brightness or frequency of theses devices. The other advantage is that we can control higher powered devices.
Hi! Please, could you tell us which transistor should be installed to use only 01 battery increasing 1.5V to 5V to work an active buzzer 5Volts? Good video - easy to understand. Tnx :)
In previous videos you showed the flow of electrons going from negative to positive charge yet in this vid you show the flow from positive to negative - so I'm confused. which is it?
In real, it is so, electrons flow from negative to the positive, but, to the convencio, the direction of an electric current is in which a positive charge would move. This was the convention chosen during the discovery of electricity. They were wrong!
Well the "SIMPLY" Electronics has performed confusion in his lectures rather than clarification (in other instances as well). You don't just CHOSE on one "convention" and then flip flop on it in the middle of the lecture series. What kind of "understanding" does this Simply Electronics posses to have not understood in the first place that to explain it one way, then completely reverse course, is not an outright confusion to us students. But more like confusion is the purpose of these lectures. Fucking CIA brainwashers.
There are two types of flows. The conventional and the actual flow. I think you should be able to adapt to both concepts fairly quickly right? It's easy to understand. Also... what does the CIA have to do with any of this XD
There is no adapting to what is laid out to deliberately confuse. Pick a convention and stick with it and NOT jump back and forth with no rhyme or reason. Assholes.
I find your video a little bit confusing. First of all you should separate BJT transistors and FET transistors. BJT´s are current controlled and FETs are voltage controlled. At your video you control the BJT as if it was a FET. Drawing symbol which you have used at video is a BJT(Bipolar Junction Transistor). It is also confusing to see something flowing away from collector at the first part and suddenly current goes into and through the collector at the second part of the animation.
Not sure if you are responding to questions anymore, but I wanted to ask if you need a diode on the low volt side to prevent any back-voltage or if Transistors prevent that already. Thanks
I try my best in these busy days! But isolation between low and high voltage side is very common in electronics and is usually done with an optoisolator. The opto would then switch the base/gate of the transistor.
Jovetj i get it a bit more now, but I guess my question should have been asked differently, if your load is a relay or something magnetic field inducing, would you need a diode, not if the transistor needs a diode.
I'm trying to figure out a circuit that turns on a motor when the light input to one LDR is greater than that to another. And turns off the motor when the light input to each is the same and turns on the motor in reverse when it is the second LDR receiving the most light. If I can make two of these circuits I can design a device that angles a solar panel towards the sun. I saw a crude solar tracker someone made using small solar driven motors that simply fought one another, the motor receiving the most light to its panel winning the tug of war, until both motors stalled out when the device was pointed at the sun. I was curious to design one using transistors though.
The base is hooked up to a separate power supply you said so it means it is its own circuit with positive and ground, now show the positive wire and the ground wire? Is the ground section the one on the left of the transistor with the arrow showing? If that is so then the one on the left is used by both the base and the terminal on the right of the transistor. Is this the case, if it is the case just say it. And what you call "light" looks more like a diode than a load or resistor? Why is that? Plus you confused me as I can't tell if in mid stream you show so called current flow is movement of positive ( holes) or movement of electrons. It seems to me like you can't make up your mind as you show both, depending on I don't know, I can't tell what?
This may indeed help me with a problem. I have a couple of transistors on a board that I am trying to repair all with a random wire pulled away from it resoldering it would be annoying and a shot in the dark if I had no clue how a transistor worked.
I could have a separate power source or the same power source supplying the base. I chose to use a separate power source to make it easier to understand as you can easily see that there is another source powering the base.
Was wondering where the rest of the playlist was. There is a dude named Giovanni V using some of your videos as his own, and I watched it thinking it was his
I can't help but notice you have your voltage flowing from + to - . In other electronic presentations I've watched the voltage is said to flow from the _ terminal to the + terminal.... So who is correct ?? or is there a reason for this which I'am currently ( no pun ) unaware of ??? Many thanks Neil.
In reality electric charge moves from negative to positive, meaning there's movement of electrons which carry the charge. The convenient convention, however is that we represent movement of current from positive to negative.
Firstly. voltage is pressure or the potential for flow, so it isn't what is moving. You are referring to current (electrons) that move. Second, when this concept first came about, scientists theorized that current would go from high pressure to low pressure which seems to make sense. The symbols were all created to reflect that. Notice the arrows on the devices point to this convention for current flow. Later, it became clear that negatively charged electrons, attracted to the positive battery terminal, were moving through the wires from the low to the high voltage but by that time, all symbols were in place so we have "electron flow" and this "conventional flow" which is still taught in engineering schools.
Electricity must flow in a loop. It can be a tiny loop or a big long one stretching hundreds of miles. But it must still be a loop. Break the loop and electricity stops flowing near-instantly over the entire loop. Current doesn't "flow to ground" because the connection to ground shown on the diagram does not create a loop. If a ground fault were to happen-for example, the (+) lead on the LED were to become exposed and accidentally touch the grounded chassis-then a loop would be formed between the (+) and (-) terminals of the battery, and a short-circuit would occur. Ideally, a fuse or other protection device would then interrupt the current flow. Connecting one side of a circuit's loop to ground ("grounding it") causes the chassis or the Earth to share the same electrical potential as that side of the circuit. This can save on wiring, or increase safety or lessen risk of fault, since if you're grounded and you touch a grounded part, no shock will happen.
Wait but why do you need a transistor if its essentially a switch powered by the effects of the movement of another mechanical switch. If the answer is that transistors are switches that can operate at incredible speed then isnt that speed limited by the speed of the movement of the mechanical switch?? Seems redundant at best. Clearly im missing some critical component here.
