Output Definition and 1000 Threads

  1. J

    Output of an LTI system when the input is multiplied with 'n'

    Homework Statement Homework Equations Find out the function of the system. Apply that to input. The Attempt at a Solution From given input output, system is a differentiator. So when input is n u[n] output is differentiating it, we get: n (impulse response) + u[n] Which is not in any of the...
  2. jsg94

    Determine impulse response given input and output signals

    Homework Statement Hello everyone, In the following problem I have to find the unknown impulse response g1(t) given the input and output signals, as shown below: (the answer is already there, at the moment I am trying to understand how to get there). Homework Equations [/B] I have...
  3. M

    How to connect audio output to an ADC

    hello to everybody, can somebody help me, how to connect audio output to dac i have a rado tuner, i just need to connect audio output to adc after to connect to arduino thnx
  4. J

    Asynchronous Counter 4-bit Output Frequency

    Homework Statement [/B]Y is output of rightmost flip flop. Q Homework Equations Drawing Timing Diagram. F(o/p) = F(clock)/(number of stages in output) The Attempt at a Solution The last flip flop has positive triggering clock. The moment Flip Flop output becomes 110X with MSB being rightmost...
  5. R

    Saving Output Files with HDSDR Software Using a Dongle

    Hello. I use HDHSDR software with my dongle and I need to record displayed spectrum. I've found how to record sound (.wav) but not yet how to record spectrum in a way for instance {frequency, level}. I spent a lot of time in searching such an information but with no sucess.
  6. Y

    Gain calculation of tube class AB output stage

    Hi I don't know if anyone here design tube power amps. I am calculating the gain of the class AB output stage of push pull tubes and output transformer. Class AB by definition has a small signal region that both tubes are working and is operating in pure class A. Only when input signal is large...
  7. wolram

    Is Solar Activity Decreasing and Causing Colder Winters in Britain?

    I found this on the net https://www.express.co.uk/news/nature/586404/Britain-freezing-winters-slump-solar-activity It states that solar activity will fall in the next few decades and Britain will get colder, Do you think this is true?
  8. J

    Transistor : Output voltage of the amplifier

    Homework Statement Homework EquationsThe Attempt at a Solution This is a solved example given in my Physics textbook . I am not understanding a couple of things . 1) How is Iin calculated as Vin/Rin ? Why is the book not taking potential difference between Base Emitter into consideration...
  9. Pushoam

    Output voltage and output current of an Opamp

    Homework Statement Homework EquationsThe Attempt at a Solution Output voltage and output current of an OP-Amp Taking the OP-Amp as an ideal OP-Amp, the voltage at terminal 1 is 0 with respect to ground. The voltage at B is ## V_B = - 0.5 V ## ## i_{in} ## is from A to B. There is...
  10. S

    Steady State output for Wave Input

    1. Problem Statement Find the steady state output yss(t) for the input u(t)=t-π in terms of an infinite sum of sinusoids. We are given the transfer function as: 2. Homework Equations G(i) = ... |G(ik)| = ... Φ(ik) = ... (this is the angle) yss(t) = βk||G(ik)|ei(kt+Φ(ik)) ***check that this...
  11. C

    MATLAB function within function handle output

    Homework Statement MATLAB The funciton "rockdynamicstage" outputs a matrix 4 by x, where x is somthing around 300( varies). The funciton "rockdynamicstage" is within the funciton handle "sim" with an input of gama0. (PayMass,Masstages,Massfrac,Thstage,IspStage,ChangeTstage) ar parameters that...
  12. S

    What would happen if we output massive amounts of helium?

    I read an article about a fusion reactor and how its waste product is helium and I am wondering what would happen if for whatever reason we output massive amounts of helium at a rate similar to how much CO2 we produced at our peak CO2 production? This is purely hypothetical so let's say we never...
  13. M

    Finding output voltage given two resistances and voltages

    Given two sets of load resistances and output voltages: Rload = 108 ohms - Vout = 9.6V Rload = 10 Ohms - Vout = 2.3V Find the source voltage and the output voltage when R1 and R2 are equal. When the resistance is very large, the voltage seems to be around 9.6. My assumption was that then the...
  14. C

    Mathematica DSolve output with unexpected parameters

    I'm trying to solve a relatively simple equation with DSolve in Mathematica. The equation I'm trying to solve along with the output from mathematica is shown In[1]:=DSolve[x*y'[x] == -b0*y[x]^2 - b1*y[x]^3, y[x], x] Out[1]:= {{y[x] -> InverseFunction[-((b1 Log[#1])/b0^2) + (b1 Log[b0 + b1...
  15. T

    How does the size of a radiator impact its heat output?

    I'm involved in a project with central heating. Due to a miscalculation the apartment radiators are about 50% too large. The current system water flow is based on the assumption that the radiators are the correct size (i.e. smaller), even though they are not. Due to this the water takes longer...
  16. esha

    I Is the Output of a Half Wave Rectifier AC Current?

    In a half wave rectifier only a single diode is present. One end of the secondary wire of the transistor is connected to the p side of diode while the other to the load resistor. The n side is connected to the load resistor. When the diode is reverse biased no current passes through it. But...
  17. D

    MHB Short table of integrals (.tex file) will include pdf of output.

    \documentclass[12pt]{article} \usepackage{graphicx} \addtolength{\textwidth}{1.5in} \addtolength{\hoffset}{-1.in} \addtolength{\textheight}{2.0in} %\addtolength{\voffset}{-1.68in} \addtolength{\voffset}{-0.8in} \newcommand {\rreal}{\mbox{$R\!\!\!\!\!l\,\,\,\,$}}...
  18. M

    Question about output voltages and impedances

    Homework Statement 1. For the first measurement, a load resistance Rload = 119Ohms results in an output voltage V(OUT) = 11Volts. For the second measurement, Rload = 11Ohms results in an output voltage V(OUT) = 3.2Volts. From these two measurements, determine the output voltage V(OUT) when...
  19. EastWindBreaks

    Is this a typo? (Complex positions of input and output links)

    Homework Statement Homework EquationsThe Attempt at a Solution since they are in complex vector form, its missing a " j " on the sin() part, correct?
  20. Mizarge

    Fortran Output of max consecutive values/days

    Hello everyone, I am working on a project with climate data and like to write a program that is able to find consecutive days with no precipitation, and furthermore only the period of each year that shows the longest lack of rainfall. As quite a Newbie regarding Fortran, I spent the last few...
  21. D

    Can low Resistance affect the torque output of an electrical motor

    I've had a side project in mind for a while involving motorized Rollerblade wheels, however I need to figure out a motor size that would give me the needed torque to actually accelerate 250lbs up to 25mph. I realize even a 5hp electric motor is large but I was wondering if ohms have any affect...
  22. C

    Analytic Continuation of DiLog in Mathematica

    I have obtained the Dilog function in some output and was just wondering if anyone knew how to interpret its meaning. The mathematica notes tell me that ##\text{DiLog}(x,\alpha)## gives the dilogarithm function, which for real ##x>1## evaluates on the side of the branch prescribed by...
  23. Y

    Fire Hose Power Output, Given Height and Radius of Hose

    Homework Statement A fire hose for use in urban areas must be able to shoot a stream of water to a maximum height of 34 m. The water leaves the hose at ground level in a circular stream 4.0 cm in diameter. What minimum power is required to create such a stream of water? Every cubic meter of...
  24. G

    Why output waveform look like this in bridge rectifier

    in our laboratory class we made a simple bridge rectifier circuit like this then we replaced D1 and D2 with resistors, and when we connected the probes of the oscilliscope on the load resistor it showed a DC output something like this(sorry for the bad drawing) can you guys explain why it...
  25. T

    Measuring the Power Output of a Generator

    Hey folks, I built a generator for fun and I would like to find out how much power it is producing when I use it. I have a way of measuring mechanical power in but I am not quite sure on how to measure electrical power out. I'm thinking I could use some LEDs to create a load (or maybe...
  26. E

    Calculating Solar Panel Area Needed for a 1MW Power Output

    Homework Statement Hello everyone, I'm working on a (simplified) Mars energy model in which I need to calculate the area of land I need to cover in solar panels in order to achieve an particular power output. Say the land I'm looking at receives a constant solar irradiance of 100W/m^2 from...
  27. M

    Dropping voltage at output of opamp

    Homework Statement I have problem at output of the first opamp . About 3 -4 minutes , the opamp's output voltage decreases by 0.1V . Although I reduced gain of opamp to 2, but the opamp 's output was still reducing 0.1V about 3 -4 minutes . Homework EquationsThe Attempt at a Solution
  28. L

    Moore machine output with a leading zero

    Homework Statement The question deals with a Moore machine of which I have omitted the diagram for reasons which will become apparent below. The initial state is ##q_0 / 0##. What is the output if the input string is aabbabaaa? 1) 101111101 2) 1101111101 3) 1010000010 4) None of the above...
  29. P

    How do I calculate the output curve of a crank?

    I am having a difficult time communicating about concepts without the math. And I have some very specific questions. So here we go with one of them. Regarding a crank mechanism, say with a throw of 10 centimeters, how can I calculate what percentage of a given constant force that is applied...
  30. A

    Why does having a high input impedance and low output impeda

    Homework Statement Say you connect Circuit A with low output impedance to circuit B with high input impedance. Why does this cause minimal voltage drop compared to connecting them the other way around (high output to low input). Homework Equations P = V^2/R P = IV The Attempt at a Solution I...
  31. V

    Ht12e/d input output logic question

    Good day. I'm currently in the soldering phase of an RF circuit designed to operate an L293D motor chip. On the breadboard I managed to get it to work, but after soldering (and checking for shorts) I am not getting proper high/low signals sent through the encoder/decoder from 2 2p2t switches to...
  32. Pushoam

    Measuring the output from a Transistor Amplifier

    Homework Statement I understand that the DC current will not flow through the capacitor once the capacitor gets fully charged. So, after a long time , only AC component of the net current flow through the capacitor. How to show that all of the carying voltage appear across the capacitor...
  33. G

    Limiting output voltage of an electric fence energiser

    My home-made energiser runs off a car battery and uses a 555 timer to pulse a Darlington-style pair of transistors. These pulse the primary of an ignition coil. Since an electric fence is an open circuit, I'm concerned about excessive voltages developing in the coil secondary causing...
  34. Z

    MHB ZyBooks: 2.4.1: Enter the output of the integer expressions.

    I'm not sure how to do these problems here. Help me learn them please!
  35. T

    How do I calculate the output current of an alternator

    Do alternators obey Ohm’s law? The alternator output voltage is proportional to the rotor excitation current. When reducing rotor excitation, the output voltage drops and the load resistance stays constant. Can why still use ohm law to determine the output current. Example alternator 480 v / 4...
  36. JaredJames

    Smoothing DC Output from Transformer

    I have a power supply which takes 230 VAC input and gives 24 VDC output. I use it to drive some differential pressure sensors (24 VDC supply and 0-10 VDC signal output). It is stated to have a noise of 80 mV peak to peak. This can equate to a 25 Pa variation in readings I'm finding with...
  37. J

    Can You Use Resistance to Fix Alternator Output at 2 Amps?

    I have a 10SI delco alternator the voltage regulator and diode trio test open to all points I put it togather this way I know it will not charge unless you ground the one side of the brushes then the alternator will put out maximim output. What I want to know if you put resistance between ground...
  38. J

    Why is the opamp output a voltage?

    Take the following circuit: The transistor turns the voltage input into a proportional current. Then it is said the resistor Rd turns the current back into a voltage. Then to calculate the output impedance of this circuit you would take Rd in parallel with the transisor's r0. But If you...
  39. L

    Simple gear pair: efficiency and output torque

    Hi. I have a question about output torque and efficiency of a simple gear pair as shown on the picture. So, I have a pinion and a gear. I give an input torque Tp in the clockwise direction. Therefore, the pinion will rotate with ωp angular velocity in clockwise and the gear ωg in...
  40. W

    How to get Output from this Program into Excel?

    Hi All, I have been trying to teach myself programming recently (Python, mostly). I obviously still have a good way to go. User MarneMath was nice-enough to help me in this post a while back: : https://www.physicsforums.com/threads/classification-valuation-problem-baseball.893418/#post-5630986...
  41. Adriano Marcato

    Output power (torque-rotation) equivalent inertia

    Homework Statement A lot of people are familiar with equivalent inertia problems, where you have a drive train and inertia on different axis and you calculate the equivalent inertia on whichever shaft you want. This time I (try to) bring something new, trying to associate the output power to...
  42. eigenmax

    Is the output of my ignition coil AC?

    Hello, I am working on a project that requires both high voltage AC and DC. I was going to use an ignition coil for the AC because I thought it's output would be AC, but when I saw this illustration...
  43. S

    Voltage output of a photodiode (solar cell)

    Hi, I'm trying to figure out how the angle of incidence will affect the voltage output of a photodiode. The obvious answer that comes to my mind is that the voltage output should be proportional to the cos(α), where α is the angle of incidence of light. However, I couldn't find any...
  44. M

    How to convert Audio output jack signal to 5V range?

    Hi Guys, Can Some one Help me to Figure Out how can i Convert Voice Signal from 3.5mm Jack to Voltage. Though the voice signal has low signal strength can i boost it using amplifer and to get output in Voltage what is the Process i am not figuring out the perfect way. Sugest me your Option...
  45. N

    How to measure output voltage of B200?

    Hi, I am a new student and trying to to measure the power and voltage output from B200 SDR device (https://www.ettus.com/content/files/b200-b210_spec_sheet.pdf) using oscilloscope (TDS3000 Series: https://www.atecorp.com/ATECorp/media/pdfs/data-sheets/Tektronix-TDS3000_Series_Manual.pdf)...
  46. E

    Experimenting with Windings: Maximum Voltage Output?

    I attach an image of something I am experimenting with. The picture itself (and added text) should be self-explanatory. 1) Which way should my windings (clockwise or counter-clockwise) go around P1; P2; P3 & P4 for maximum voltage (V) ? [ 1 Ø ] [ 1 x single enamelled copper conductor ] [...
  47. A

    Find V(o) / V(s) in Output Opamp Voltage

    Homework Statement In the figure below find V(o) / V(s) Homework Equations In an opamp current doesn't enter through the inverting and non-inverting terminals, furthermore in DC conditions a capacitor acts like an open circuit The Attempt at a Solution The way I see it, both capacitors will...
  48. S

    Single-mode optical fibre output not Gaussian?

    Is there anything that would make a single mode fibre's speckle pattern not look Gaussian? I've attached two images (below) The Fibre C speckle pattern looks multimode The Fibre A speckle pattern doesn't really look convincingly like multimode or like single mode. A HeNe laser was used to...
  49. D

    Alternate derivation of output capacitor ripple voltage buck

    Homework Statement I'm trying to find the output voltage ripple of a buck converter by using just the waveforms and the inductor ripple. Homework Equations [/B] I know that the answer is supposed to be D(1-D)Vin/(16*L*C*f^2) but I keep getting D(1-D)Vin/(8*L*C*f^2)The equations I end up...
  50. doktorwho

    Question about limiting inputs in C

    I want to write a program that in the twodimensional array stores only capital and noncapital letters of the alphabet and the sign #. Everything else inputted cannot be stored in the array. How am i to do this in the easiest way? I can think of only checking for each input if it exists in some...
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