Do you recommend reading the textbook along with these videos? I felt like the mention of P_load formula at the very end was kinda of confusing. I understood the part about having a higher resistance makes current lower and all that...but I dont really get the part of the max power being when R_AB = Rthev.
@aftabhossain2643 күн бұрын
Can't tell you how much your videos have helped me for my midterm. Stay blessed from 🇧🇩
@XLaloZ5 күн бұрын
Please do circuits 2 🙏🙏🙏
@TR117069 күн бұрын
For what weight is that loadcell designed?
@jouseftriny48229 күн бұрын
where can I find the full stream???
@okaytree77119 күн бұрын
Can you give a quick example of what Thevenin theorem is useful for application wise? Im a bit confused because we can find Vthev and Rthev, but then how do you know how much current will be draw? I guess if you had a motor with some resistance as the load, finding VThev might help? Thanks!
@ProfessorJohns9 күн бұрын
Batteries are a good example. We commonly model batteries as a simple voltage source. If we model them this way, we make the assumption it can supply infinite current. Modeling a battery as a voltage source and an internal resistance (Rth) becomes a better approximation. We can actually calculate the maximum current that a battery can supply to a circuit. You are also correct with the motor example, if we are analyzing multiple alternatives for motor design it would be much easier to just solve the circuit with a source and a resistor instead of trying to solve the complex circuit for every motor alternative.
@okaytree77117 күн бұрын
@@ProfessorJohns Thank you!!
@Cst10idk11 күн бұрын
Sir, is this the end of the series?
@okaytree771113 күн бұрын
I had one more question, for source transformations, I'm confused because I would assume that when making a voltage source a current source in parallel with a resistor, the current will now be split, and a lower current will flow through the resistor, creating a different voltage than the original voltage source.
@ProfessorJohns13 күн бұрын
You are correct that the current in the parallel resistor will “split” between the resistor and the load in the current-source version, but the total current delivered to the external load remains consistent with what the voltage source would provide. My advice would be to draw a simple circuit with a voltage source and 2 resistors in series. Solve for the voltage across the second resistor using traditional voltage divider. Next, analyze the same circuit by first doing a source transformation with the voltage source and first resistor. You will find the voltage and current through the second resistor to be the same as the first scenario. You can study these two examples and I think you will more deeply understand what is going on with source transformation, rather than just following the set rules I laid out in the video.
@waqarahmad399614 күн бұрын
Watching this lecture just before I have to go for a quiz, and I have to say, this genuinely helped, thank you 🙏 Love from Pakistan
@okaytree771120 күн бұрын
I am a bit confused why we can just draw a reference GND anywhere in a circuit and find voltage... I feel like that almost changes the circuit.... Can I always just keep a gnd in any circuit problem and use it to help me assume other voltages and currents?
@ProfessorJohns19 күн бұрын
You can put a reference anywhere you want, its commonly placed on the - side of the voltage supply. This ensures all the node voltages will be positive when solving. If you randomly place a GND reference on a diagram, you will find that you will have negative values in voltage when solving.
@okaytree771116 күн бұрын
@@ProfessorJohns Thank you!
@aleenakhan6230Ай бұрын
I think it is 1.5 x 10^(-5) C
@Yoonjiha61Ай бұрын
Your voice is absolutely clear, so it’s very easy for Asians like me to listen. Awesome!😍
@DramaManiac...Ай бұрын
Is there a discord for discussion?
@ProfessorJohnsАй бұрын
Is there is, I wasn’t invited 🤷♂️
@DramaManiac...Ай бұрын
@@ProfessorJohns 😂😂...i was just wondering if you had a discord server where we can discuss the topics that you teach here
@ManjunathBM21Ай бұрын
❤️ from India, u covered 4 hr of Class Lecture in just 26 min, Thax for Saving my time, so that i can invest it in Furthur complex problems.......🙌
@ProfessorJohnsАй бұрын
Glad to hear! Cheers!
@ShalenaLageneOjeiАй бұрын
why did u times by the 4 and the 6 where did u get that from
@kimstarvАй бұрын
So good
@okaytree7711Ай бұрын
You guys should really look up how to derive the voltage divider formula. He should have covered that. Now im kind of worried that this series wont go in depth at all...
@ProfessorJohnsАй бұрын
🤷
@Leshy_Ай бұрын
Its all coming back to me FUCK ME
@davidlevitan1571Ай бұрын
Solution at Back of books says 10.08.
@muhammdowais45842 ай бұрын
Voltage is dw/dq
@ProfessorJohnsАй бұрын
Correct. Mistake in video.
@qussaioqlat13502 ай бұрын
@qussaioqlat13502 ай бұрын
much appreciated thank you
@lolmog58122 ай бұрын
sure there is someone on youtube who explains it a hundred times better than others, especially my lecturer. what would i do without you thank you soooo much
@k5r2972 ай бұрын
9:53 If there is no feedback, will v1 still equals to v2? Thanks for answering!
@ProfessorJohns2 ай бұрын
Good question, we model op amps as black boxes so we don’t really know what circuitry exists on the inside. We just use this rule to analyze ideal op amps. In the real world, they most likely would not be equal without feedback. In this analysis, we also don’t model the power source for powering the amp. Depending on the power source, it also places more constraints on the op amp. In the real world, there are op amps that excel in some applications but will perform poorly in others. It is important to study the specifications of op amps to select the best performer for your real world application.
@marcosferreiraoff2 ай бұрын
Whats raspberry this is? My is raspberry zero 2w, but not install this is form. I have problem whith, because not install bbt. Thanks
@marcosferreiraoff2 ай бұрын
Raspberry zero 2 w?
@SuperMateus252 ай бұрын
Hey! I finally understanding it! Tks professor!
@dilshadarazinnia2 ай бұрын
Sir, why did you add these voltages at 32.17 timestamp? Does there any explanation behind this?
@ProfessorJohns2 ай бұрын
Voltage is always in reference point (commonly ground - 0 V). In this example a voltage source is connected between two nodes, in this case we call it V2 and V3. If V3 was ground, then V2 would be 5 V. However in this case, V3 is not at 0V, it is located in the circuit where the - side of the power source is not connected to ground. So we must write the equation as V2 = V3 + Vs, where Vs is the voltage of the power source (in this case 5V). When solving the system of equation we find that V2 = 9.2 V and V3 = 4.2 V. This checks with our equation 9.2 = 4.2 + 5.
@dilshadarazinnia2 ай бұрын
@@ProfessorJohns thank you so much sir! I understand ☺️
@okaytree771125 күн бұрын
@@ProfessorJohns I think it also helps them to understand it in terms of "higher and lower" potential. The V2 is on the higher potential side (+) of the 5V, and the V2 is on the lower end. So thats why its V2 = V3 +5V (at least I think so lol)
@MrAmmadAli3763 ай бұрын
Amazing sir 🧡
@srisharan93713 ай бұрын
Hello professor, I would like to know more about how have you integrated LLM with Cameo
@FourthLaw3 ай бұрын
I am glad i found this channel your explanation is awesome i understood the topic without any question on my mind thank you sir
@ProfessorJohns3 ай бұрын
Thanks for the kind words!
@Qweeeeegame3 ай бұрын
Thisnis amazing, thank you sir
@dushanmadushanka52393 ай бұрын
Thank you so much ❤❤
@ProfessorJohns3 ай бұрын
Welcome!
@marcosferreiraoff4 ай бұрын
Mine is showing this error: Traceback (most recent call last): File "main.py", line 1, in <module> ImportError: no module named 'RPi' MicroPython v1.22.0 on 2023-12-27; Raspberry Pi Pico with RP2040 Type "help()" for more information.
@marcosferreiraoff4 ай бұрын
import RPi.GPIO as GPIO import time import hx711 # Configuração de GPIOs dt_pin = 17 clk_pin = 18 # Configuração do HX711 hx = hx711.HX711(dt_pin, clk_pin) # Calibração (opcional) # Se você já possui os valores de offset e scale da calibração anterior, # utilize-os aqui para maior precisão. hx.set_scale(318.64) # Fator de escala hx.set_offset(117800) # Offset # Função para ler o peso def read_weight(): try: # Leia o valor bruto do HX711 weight_raw = hx.get_raw_data() # Converta o valor bruto em peso weight = hx.get_weight(scale=318.64, offset=117800) # Imprima o valor do peso print(f"Peso: {weight} kg") except Exception as e: print(f"Erro ao ler peso: {e}") # Loop principal while True: read_weight() time.sleep(1) # Ajuste o tempo de intervalo entre as leituras
@ProfessorJohns3 ай бұрын
Você pode digitar comandos `pip` no terminal do seu Raspberry Pi. Aqui estão os passos para fazer isso: 1. **Abra o Terminal**: Você pode encontrar o aplicativo de terminal no menu do Raspberry Pi OS, ou pode usar o atalho `Ctrl + Alt + T`. 2. **Digite o comando pip**: Uma vez que o terminal esteja aberto, você pode digitar o comando `pip` para instalar a biblioteca `RPi.GPIO` ou qualquer outro pacote Python. Por exemplo: ```sh pip install RPi.GPIO ``` Se você estiver usando Python 3, pode ser necessário usar `pip3` em vez disso: ```sh pip3 install RPi.GPIO ``` 3. **Execute o comando**: Pressione `Enter` para executar o comando. Se você encontrar problemas de permissão, pode adicionar `sudo` antes do comando para executá-lo com permissões de superusuário: ```sh sudo pip install RPi.GPIO ``` ou ```sh sudo pip3 install RPi.GPIO ``` Seguindo esses passos, você pode instalar os pacotes Python necessários no seu Raspberry Pi.
@turang24 ай бұрын
시험 3시간전 최고의 선택
@turang24 ай бұрын
항상 최고십니다….
@dirtbagd894 ай бұрын
Interesting video. What about the torque reaction from the torque going through the rear wheel to the road. This would also be trying to lift the front of the bike so shouldn't it be considered too?
@ProfessorJohns4 ай бұрын
The torque at the rear wheel is taken into account in this problem. Since we are tasked to solve for acceleration, we don’t frame the problem in terms of rear wheel torque. The acceleration we solve for in this problem is the effect of torque on the rear wheel. At the end of the video we solve for the frictional force between the road and the tire. If we knew the diameter of the wheel, we could solve for the resultant rear wheel torque needed to lift the front tire off the ground. Also, note that this is a static problem, we are not considering dynamic effects (the rider shifting weight, effects of “popping the clutch, etc.) It is a simplified analysis, in reality, by shifting your weight and using the clutch advantageously it would require much less acceleration to lift the front wheel off the ground. Thanks for taking the time to watch the video.
@gogo-wm8fd4 ай бұрын
Thank you soooooo much!!!!!!
@ProfessorJohns4 ай бұрын
You're welcome!
@eeecoachinghome4 ай бұрын
Thank you sir
@sandmanentertainment4 ай бұрын
For the special case of nodal analysis. You used the formula V2=V3+5. Why is it not V3=V2+5 ? Should the voltage not be higher at the node after the voltage source?
@ProfessorJohns4 ай бұрын
Notice the + and - on the 5V power source. V2 must be 5V higher than V3. "After" the voltage source is the node on the + side of the voltage source. If the power source was arranged in the opposite direction your suggested formula would be correct. Hope this helps.
@sandmanentertainment4 ай бұрын
@@ProfessorJohns Yes sir thank you! Currently binging this series.
@kocr35474 ай бұрын
can we use other load cell for raspberry pi 4
@ProfessorJohns4 ай бұрын
Yes, it is dependent on the HX711 really. Check websites such as amazon and many of the hx711 boards come with different options for a load cell.
@therookie2734 ай бұрын
Thanks For uploading 🙂
@ProfessorJohns4 ай бұрын
No problem 😊
@dav55934 ай бұрын
ur teaching style is optimal. deserves way more subs
@erwinsmith33254 ай бұрын
thanks man,helped a lot
@worldoffunnblabla53674 ай бұрын
You accidentally put 45 instead of 40 when calculating i
@MAMTAKUMARI-ok7vw5 ай бұрын
Sir please continue this
@surajshukla17875 ай бұрын
I should thank god for finding your vedioes on this topic)
@surajshukla17875 ай бұрын
I actually admire your efforts for making it for free on KZbin... Subbed you
@MppsPothangalkalan5 ай бұрын
Very nice video edit.
@vanvihung89825 ай бұрын
Need this in slow speed, fundamental terms always need a lot of time to digest, other lectures always go too fast.