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😢can I any one tell how I set the frequency from function generator

What’s the negative side of Delta not having a neutral? Symptoms? Thanks, Austin

These videos are pure gold! So much better than any tutorials I've read on the matter 🥇

What if the load for the both voltage sources is the same i.e 10 ohms. Surely the load is not fixed

The values from the table. Where can you find it? Any book you recommend ?

OK, so I ran across a really old 2-phase motor and was working on a replacement. I put an amp meter on the 2 phases I found at the disconnect and took a voltage reading too. I wanted to calculate total motor power to see if the current motor is sized correctly for the load. I put them into a spreadsheet to calc power. However, that spreadsheet used P = V * I * sqft(3). I think that for a 2-phase system that was wrong. Would I actually just add the amps from the 2 wires together to get the power? As is P = V * (Amps1 + Amps2)

Love the clear explaination, helped to clear up a lot on the topic. Thanks!

Very good video: short and to the point, well-dictated, examples given. Great job

very good

I'm here for eDX courses and i love the way you explain.

something doesnt seem right. he says you have to overcome the work function in order to get electrons to flow, but, if you think about it, a magnet moved across a wire gets electrons to move, meaning, the power supply already overcomes the work function in order to get current to flow and since the vacuum gap is essentially a conductor with zero resistance, the electrons should continue to flow, so his reason for why it doenst unless additional means of essentially induction occur seems irrational. replace the vacuum gap with a conductor and current flows, so why doesnt current flow when a gap of a conductor is replaced with a zero resistance conductor? hes talking like there is an insulator between the electrodes which require a sufficient voltage to overcome to induce current flow, which would mean a vacuum isnt actually empty

another great video and explanation, thanks!

Aaron's BJT videos are great. It takes him 25 minutes to explain various topics, I spend hours offline to understand the contents. After putting that offline effort in, I watch the video again.

Thanks Aaron

Very nice presentation

Why is ((V2/V1)(V1/V2)) = 1 is needed? I need the thoery behind this equation... All the analysis is very clear.. But At 3:28 You just jumped to derivation by saying my " strategy is just to multply this two term... " and am lost there🙏🏾🙏🏾🙏🏾

thanku aaron

transistors are diode over a layer of n or p channel material. if diode conducts transistor will be open. its simple.

I am back and starting here maybe this will help me in understanding motor control transistors, Look like a 3 year course ahead. Dennis

Thank Dr Danner, I was a Mech Engr and worked is systems, Medical Imaging, Factory Automation, Robotics Assembly etc etc. In retirement i have pulled out my old (1950) train set. I was determined to update it using IOT, why not that should be fun. Oh my, Motor control with Transistors is giving me such headaches. I buy circuits that work but I have no idea why. And when I want to tweak the performance I am lost at which way to go. I tried to listen and learn but I must say it is very hard. Do you have any practical applications of motor control with braking? I have a mini DC motor 3.5VDC that i want to make Puff Smoke on the engine stack. Timed to the drive wheel rotation. So I need a burst then stop, then burst then drop. The burst is driven by a sensor, but the Brake was design to stop the motor when the puff trigger pulse is off. But I am getting so much coasting there was no stop of smoke between puffs. Its a very simple and the circuit i was given is very simple but now I need to tweak the circuit. ??????????? No idea where to go to decrease or increase volts. The originator suggested dropping one resisitor from 500 to 100 ohms, and it helped. Amazing, No I am looking at the fan blade weight. It this anything you would have information of a link to a lecture that might help me to get this logic sunk into my grey cells. Thank You, Dennis

how can we make that circuit without the voltage regulator(as a standalone overcurrent/short circuit protection)? thanks

This is absolute legendary explanation. From my experience transistors have always been a very confusing topic considering so many variables and assumptions. Your videos are a treasure chest for this matter

No comments interesting

I love Ben Eater, but this guy is the best at teaching this content. I am new to his community and I hope he is still making content. Excellent work brother.

Very informative playlists on your page! I think there is a correction in example 1. The base current is 4.3mA/100 = 0.043 mA and not 0.0043 mA. About 1%. Still negligible. 👍🏼

Excellent explanation, & easy to understand! Now, I understand that Ge transistors have about 0.2 volts across their junctions and Si have about 0.6 volts. But I have here in my hands a power transistor (?, they look just like b/b diodes to a diode check meter) that doesn't fit into either slot very well with 0.48 and 0.49 volts. It's a Motorola SJ4836, a TO-3 from 1985. I can't find any documentation on it, and don't know even if it's a Si transistor with that low a drop, and just a little high to be Schottky. Any idea as to what this junk box find might be?

Great series so far. Just a comment, it was a bit confusing when you said "this is not a source", while drawing the symbol for a source at 9:06.

awesome

You went too fast ! Why ?

After designing a filter with a certain fb, I would like to change fb by only adjusting the resistance value. Is there any other way to do this than to change the values ​​of the resistors that make up the filter one by one? I would like to change the center frequency by changing the value for the number of minimum resistors.

Which unit has the calculated gain? If it is not dB, how can we convert it to dB?

god's work

Fantastic!

At 9:26 in this video: When calculating Re (emitter resistance), where does the value 26 come from? Is that a static constant? I can't place it. Thanks!

You could have explained all the cases by superimposing the vcc= rc x ic + vce curve on the transistors operating curve of the manufacturer instead of drawing on for 20 minutes and no doubts cleared

Can you tell one thing? Give typical voltages on the ic vs Vce curve. There is a sharply rising part initially and then plateaus of. Where is 0.7 volts on this curve- at the origin before it takes off or where it plateaus off? , for a given Ib. Everybody takes 0.7 volts without getting into the saturation aspect. Secondly in the first example of forward bias case the Ve and Ib will remain the same even if you took Rc and Re as 10k instead of 1k. Is that believable? In the 1k case the operating ppint will be on the plateau region ie saturated. In the 10k case the operating curve will cut the Ic curve on the vertical stretch meaning Vce in the vicinity of 0.7 and possibly several volts in the 1k case

i have found in practice and documentation that Cbc X Beta is quite close in approximating Miller capacitance. it's not exact, but close enough for most design work.

Thank you so much for these videos! I knew all this stuff 40-plus years ago, when I got my AAS in electronics, but have forgotten most of it. Your efforts here are very much appreciated!

Very good. I wish we had vids in the '70s (in the USN) & early '80s -- when I was in EE school. Good luck.

Thanks

thank you for the explaination . 👍👍👍👍

Nevermind I found it. :) Great videos. Edit: I found this map but I can't see where it shows substations. atlas.eia.gov/apps/895faaf79d744f2ab3b72f8bd5778e68/explore

I am thinking how to make it more stable... it is ok but still not enough for me.

This is where circuit analysis enters the time domain. Also energy storage in the form of an electric field (via capacitor) and magnetic field (via inductor). Time domain analysis is usually introduced via switching events in resistive circuits with dc sources that also have capacitors and inductors.

I suspect people get confused if they try to reconcile transistor action (involves including the effects of doped silicon) with the sign convention for current in the circuit which is opposite the sense of electron mobile charge carrier flow.

Professor, I have found your videos to be nothing short of amazing. I feel like I’ve retained so much more than when I read the same content in a textbook. Any chance you will also teach us FETs and Power Amplifiers? Crossing my fingers that you will!

On page 36 of the book "The Art of Electronics 3rd Edition", Figure 1.72 shows a simple diode voltage clamp which looks cool, so I gave it a try. I set the cathode of the diode to a commercial DC voltage supply, set its output to 0v. Signal is connected to my signal generator, it generates a sine wave at 5v / -5v peak. In my imagination, the diode anode should be around 0.7v peak. To my surprise, no, no, the output waveform showing on oscilloscope show the output being clamped, but not at 0.7v, it was as high as 1.85v... What's going on? The voltage output showing on power supply panel is 0v, but the actual value is 1.85v. Obviously, this voltage source is far away from an ideal voltage source, it has a big internal impedence. By inserting an op amp voltage follower between the voltage supply output and the diode cathode, the problem went away. Now, the output wave has 0.7v peak value.

I was very intrigued by reverse active mode operation and went on a small googling tangent. Results came up with this very specific usecase for reverse-active-mode: Fuzz-Effects for Guitars. Running VERY HIGH gain NPN Transistor (2n5089 e.g., with a whopping 1.2k in the best case) in reverse mode severely limits their gain and reduces saturation current such that the transistor itself saturates and distorts the input signal long before clipping into the supply rails. This is said to give a more "tube-like" distortion with less unpleasant harmonics.

Thanks for the amazing and clear content, subscription earned!

great video as always