Output Definition and 1000 Threads

I have a https://www.lattepanda.com/products/lattepanda-delta-432-with-win10-pro-activated.html single-board computer. For my project, I'd like to power it from a 12V tractor battery if I can. I also have the option of powering it via the JST ph2.0 4P 12V DC connector. I discuss this option with...

For the following circuit I need to find the output waveform. A. Conceptually I am at sea here but I will have a stab at it. My though process is as follows : At a given instant, the AC voltage is at a fixed value and this value drops (##V_drop##) across the resistor ##R##. The voltage...

I am trying to create a receiver for a personal project I am working on. This is the RF amplifier that I was given by a book I am following. How does this circuit work? Usually for a BJT amplifier I find the DC bias point and then use the small signal model after I bias the circuit? I understand...

Can anyone help me find what is wrong in this circuit? given, slew rate of the op amp is 400V/us and max output current for opamp is 40mA but the opamp is lm741.

1. Using the frequency equation I know the time period is 1 millisecond. 2. The duty cycle (50%) equation tells me that the pulse width and the amplitude is 1 V. 3. Thus the input waveform looks like this : (?) 4. As the slew rate is 0.5 volts per microsecond, the output voltage would take...

Since there are initial conditions stated, I would have to craft the s equation in mind, in order to find the impulse by laplace inverse; which is this: ##(s^2Y(s)-sy(0)-y'(0))+8(sY(s)-y(0))+16Y(s)=x(s)## ##(s^2Y(s)+\frac{1}{2}s-1)+8(sY(s)-1)+16Y(s)=x(s)##...

Although the universe is not old enough to experience these yet, but near the end of the lives of red dwarf stars, they will go from red to yellow, to blue eventually. Does this result in additional heat being given off of the surface of those stars? And if so, then does the habitable zone of...

I am looking at the module HLK-5M05, which is a ##5\ V, \ 5\ W## AC-DC power supply module. The advantage of this module is that, it does the stepping down and rectification within itself, and is a switching source, so fluctuations in the voltage grid won't affect the output (at least that's...

Some Variable Frequency Drive manufacturers (such as Allen Bradley) supply a toroidal Ferrite core to wrap the outgoing cables around to reduce EMF. My question is, if a company doesn't supply a ferrite core, how do I work out if one is needed, and how do I correctly size it? I understand that...

Hi Everyone, This is my first post and I hope to work with you on this to gain a fuller understanding. I'm currently designing an LED circuit with 60 3 watt LEDs. Input power is both 120VAC for North American and 230VAC for other countries. I know this is pretty basicbut what is the best way...

Hello everyone. I'm working on 3D animation about da Vinci tank and why it doesn't work. Please help me find out how to compute: 1: how many men need to move this machine 2: what power on wheel can produce different number of man, like 1, 2, 4, 8.. vehicle mass = 8t men strength = 60kg lever...

Hi PF! I am running Ubuntu 18.04. The terminal output has all new lines at the bottom of the screen. This is giving me some discomfort. As such, is there a way to have the terminal output new text at the top? I've googled it but didn't find much. Thanks!

Hello everyone, I see videos showing the output torque can be increased by using gears and this is usually demonstrated with DC motors (simple DC motors can be removed from toys). I understand the general logic: * The DC rotates in a high speed. * The gear system reduces the output speed. * If...

I was looking at some websites that show the proof of addition of limits for a finite output value, but I don't see one for the case of infinite output value, which has a different condition that needs to be met - i.e., | f( x ) | > M instead of | f( x ) - L | < ε...

Hi PF! My question is easiest to show via the following input, the output, and my desired output. input: x^2 + y^2 // CForm output: Power(x,2) + Power(y,2) desired output: pow(pos().x,2) + pow(pos().y,2) I appreciate any help you can offer. Thanks so much! Edit: for what it's worth, I'm just...

While trying to understand the working of a full wave rectifier I was unable to precisely understand the working of the central tap transformer. Edit 1 : The voltages are out of phase by 180 degrees as voltage is alternating(?) So the only thing I don't understand is how the distribution of...

Hello, Is there a formal mathematical link between the amount of electricity that a turbogenerator produces and the corresponding combustible quantity? I understand that, in the case of a gas turbine, rotation and therefore mechanical energy is converted to electrical energy (preceded by a...

I have to solve a problem related with an 'invented' (non-real) MOSFET working in its saturation region (amplifier). I have solved all the questions, but I'm unable to get the last one. Basically, I need to determine the output resistance of the amplifier as a function of other given 4...

Summary:: I was trying to derive the equation for the output impedance of the ICIS circuit. Here's what I've tried so far. What I have derived does not agree with the one provided in my book. Since it is a current source the negative feedback must increase the output impedance. The one I...

Hello All, Happy New Year! A typical modern turbofan engine system creates lift as well as propulsion for the aircraft. Somewhere inside the system, the fast rotating device also works as a generator (alternator) to produce the electricity powering electrical/electronics equipments. What is the...

import PySimpleGUI as sg print("The age of the universe is", age_of_universe, "Gyr") print("The age of universe at z = ", z, "is", age_of_universe_at_z,) print("Lookback time is", lookback_time , "Gyr") print("Comoving distance to an object at z =", z , "is" , comoving_distance, "Mpc")...

Im confused about how the output current of a transformer is fixed ie can be calculated by the law of conservation of energy only...(VI)in = (VI)out ? If the secondary coil is part of a circuit, and the secondary voltage is defined by V1/n1 = V2/n2, then the current in the secondary circuit...

I am working on a guitar/piano synthesizer for my own interest. When a string is plucked or struck, tension increases causing a slight pitch bend and change in the inharmonicity. This change then settles as the note quiets down. Thus it is important to model how the tension rises above baseline...

How did you find PF?: youtube [Moderator: moved from new member intro forum]How did you find PF?: youtube i need a falling mass over time /joules per kilo over 1hr time also need to know how to figure gearing to maintain fall over time in regards to a set resistance such as a 5 kw alternator

I guess USB powerbank have switching power supply for the 5V output? I need a pure 5V power bank that doesn't use switching power supply but just pure output like the 3.7v lithium battery in cell phone. And why doesn't lithium battery doesn't produce 5 volt dc output?

Hi PF! The following is a simple ODE I'm solving via DSolve. However, the solution, which I call uEven, does not work as a typical function. Note the last two lines are different. Does anyone know how to fix this, so that I can differentiate and integrate the output of this ODE without...

Setting aside whether this works or not, can someone here compute the output in watts-?

I'm in an online Masters program. The Bayesian statistics class can get a little intense with the mathematics. A classmate shared this link to incorporate Wolfram Alpha results with a Jupyter Notebook. https://community.wolfram.com/groups/-/m/t/1717637

To be more precise the generator has to be able to produce around 1.5 Watts from a person spinning its axis, which is why I was thinking of putting a gearbox in my design but I need to know how much Torque would it take to spin the axis and at what rpm would the generator be effective.

Hello guys, I am building a small prototype for a Coolant Dispensing System and need to measure the flow rate of water & chemical in the pipe in order to control the opening of valves downstream. Since I am building a small pilot system, I can't really spend too much money and hence I intend...

Hi friends, I have taken three sine AC sources and have joined them in series. I want to find the output impedance of this circuit. Formula that I am using is...Output impedance = (Open circuit voltage - Output voltage with load R1) / Output current with load (R1) Load resistance = 1 k ohm...

Can anyone confirm if the following in Mathematica gives an output that is not 1? I'm getting some sort of sinusoid, but I should get 1. k = 2; Plot[k^2 JacobiSN[t, k]^2 + JacobiDN[t, k]^2, {t, 0, 10}] Thanks!

So I know the formula " W_turbine = m_flow rate * (H_in - H_out) " BUT is there any formula that utilizes the turbine volumetric flow rate (m^3/sec) at the outlet? The following data is available, I just need the formula... P_in= 2.36 Mpa P_out= 0.95 MPa m_flow rate= 0.02 kg/sec eff_turbine= 70...

can some one help me understand this problem conceptually I'm doubting the explanation given below (superposition happens on when they are on the same axis right but this problem two frequencies are on orthogonal basis). My thought was since frequency on Y is twice as many as on X. so i picked E

Homework Statement: Referring to the opto-triac output circuit shown below. ... Given the following parameters: Logic voltage = 3.3 V D1 forward voltage drop = 1.8 V D1 operating current = 10 mA Opto-triac minimum operating current = 2 mA Opto-triac LED forward voltage drop = 1.6V Calculate...

A is given waveform, we have to use circuits to get B and C waveform. For B we can use an And Gate with 2 inputs, X and Y. X is buffered (to get some delay) and is fed to Y input of And Gate. So we'll get waveform B. But I don't know how to get C waveform. The question is that even if I extend...

Is it possible for order to arrive out of disorder on a macro scale? Contrary to the 2nd law? Specifically, is it scientifically acceptable to believe that the random mutation of genetic material, which was itself produced by the random coupling of molecules has resulted, over the extended...

As the title says, I am studying this topic for my control systems fundamentals course. I think I intuitively understand the meaning of the convolution integral that relates input, output and the impulse response, but I am failing to prove it graphically. For example, the intuitive explanation...

I'm interested in the following problem: given a random number n (n can be gigantic), how do we find a pair function+input(s) whose output is n such that the input(s) are relatively small in size? This problems arises in data compression; consider the bits that make up a file (or a substring of...

Just need a bit of guidance to make sure that I am heading the right way. Question is: Fig 3 shows the block diagram of the control of an electric heating system. The heater is driven from a voltage-controlled power supply, the voltage V1 being derived from a potientiometer. The output...

I know for ideal opamp the input Z is infinite, and output Z is 0, but not sure about this opamp.

Here is question: Find voltage across R3 options: 10V 11V 5V 2V Attempt: No current flows through Opamp, so 1mA flows through R3, this gives voltage across R3 = 1ma * 1K = 1V. But that is not in option. Where am I wrong? No current flows inside or outside opamp, right?

I is proportionate to E. r = 4.3xxm So I put 0.75I The answer is 49mW.. But I got 97.xxmW What is wrong?

Summary: I have an electric motor that produces 6 nm (4.4ftlb) of torque and rotates at 50 rpm through gearing. I have a weight I need to move. It’s a 20 kg weight that needs move up and down 20 cm with one second to move down and one second to go back up. The electric motor rotates at 50 rpm...

I have this curcuit. I want to discover the output impedance. Using h-parameter model I get the second circuit. I know that Zout= V(open circuit)/I(short circuit) and ie = C ib, where C is an appropriate proportionality factor. Vol = V1 Re/(Rb+Re) = (Rb ib + Re ie) Re/(Rb+Re) Isc = ie = C ib...

I have an old VCR and a library of video tape recordings I have not played for quite a few years. The output of the VCR is the old analog Channel 3 TV signal which fed into the aerial input of the old analog TV. I now have a digital TV and there is no Channel 3. There is instead, for example, a...

My first attempt was: V=zeros(5,5) a=1; i=1:5; j=1:5; V(i:j)=a./(i+j-1) I figured to create a 5x5 with zeros and then to return and replace those values with updated values derived from the Hilbert equation as we move through i and j. This failed with an error of : Unable to perform assignment...

Hi PF! I'm computing functions that depend on parameter values, such as ##f(x,n,a) = a x^n##, where I compute ##a = \int_0^1x^n\, dx##. I compute for say ##a = \{ 1,2,3 \}##. Is there a way to save this in a different notebook so I don't have to repeat computations after I close Mathematica...

Hoow can one estimate the amount of steam required to generate certain amount of electical power mathematicaly?