Output Definition and 1000 Threads

  1. C

    Why is this simple output so difficult to code in C

    1 1 2 1 1 2 1 2 1 1 2 1 2 1 2 1 1 2 1 2 1 2 1 2 1 I am stumped on how to do this, is it really as easy as it looks?
  2. R

    Design a logic gate for each different output

    Homework Statement http://media.newschoolers.com/uploads/images/17/00/58/56/03/585603.png Homework Equations None The Attempt at a Solution I have tried just messing around with them, and I have tried to turn this table into a "boolean" expression. I have no idea how I would begin to solve...
  3. Y

    Engineering NAND Logic 4 input circuit with nonstandard output

    Homework Statement I have a weird boolean algebra expression for which I need to build a circuit using solely the NAND gates. There are 4 inputs A,B,C,D. From the truth table (I do not know how else to approach this question other than constructing the truth table and then trying to fit the...
  4. P

    Electrical Engineers: Need help with thermostat output options.

    I'm working on a project were I will be using Heating Plug Element- http://www.omega.com/ppt/pptsc.asp?ref=CSS_CSH&Nav=head01 I want to be able to control temperatures up to 1000 F using something likes this: http://www.omega.com/Manuals/manualpdf/M4636.pdf I would like to be able to...
  5. A

    Improving Resolution of Sensor Output

    I'm working on a sensor signal conditioning circuit. The sensor output has a 2.5V DC bias with a peak-to-peak voltage swing of about 50mV. The signal output is put through a demodulator and then filter (LPF) to obtain a DC voltage proportional to the out of the sensor. The problem is I need to...
  6. T

    Find the Differential Equation Relating Input Voltage and Output Voltage

    Hey all, I'm stuck on a dynamic systems question, it's attached as a jpeg I started off by writing nodal equations for each node: Node 1: 1/R1(ei-eA)=C1D(eA-eo)+1/R2(eA-eB) Node 2:1/R2(eA-eB)=C2D(eB) I know that I have to isolate for ei and eo but I'm really confused with...
  7. M

    Inverting Amplifier maximum output voltage

    Homework Statement I'm doing a physics lab that involves an inverting amplifier. I'm pretty crap when it comes to electronics. I've discovered that the output voltage won't go past 8Vrms. The amplifier is like the one here...
  8. A

    High-Quality Output Buffer for Battery-Powered Audio Circuit | Impedance: 50Ω

    Hi guys, I'm currently designing a battery powered audio circuit. I've already finished all the signal processing stuff, and now I'm looking for a suitable output buffer to drive the speaker, which is about 50Ω impedance. Some of the requirements for the op amp buffer: - Single supply...
  9. R

    Transformer output indepedent of core permeability

    I am having trouble pinning down why the relative permeability of a transformer core will not directly affect the output voltage. In fact the voltage is determined by the turns ratio and is independent of mu of core material. Given this where is the flaw in the following reasoning: Induced...
  10. M

    Effect of Blade Angle on Power Output of wind turbine

    Homework Statement Hi all! I am been working on an EEI. Basically I recorded the power output (P=VI) of a wind turbine with the blades at different angles. I went from 0 degrees (flat) to 180 degrees in 15 degree increments. Averaging the data I see a graph like this: Also, just to...
  11. P

    Filtering problem. Help with the output

    1. Homework Statement Determine the output if this signal is processed by a filter with the following transfer functions: u= \sum_{k=-\infty}^\infty c_n*exp(j*\pi*n*x)= \sum_{k=-\infty}^\infty rect(x-2k-.5) c_n = 0 for even = 4/(j*\pi*n) for odd Determine the output if this signal is...
  12. F

    Calculate output voltage PNP/MOSFET

    How do you calculate Vo using PNP/MOSET? What principles are used please?
  13. Z

    Why Is Input Impedance Different from Output Impedance in Electronic Circuits?

    I'm having a really hard time understanding input vs. output impedance and also the usefulness of the Thevenin model. Let's say we have a simple voltage divider consisting of two equal resistors. The output voltage is between the resistors. If the input voltage is 10v the output voltage has...
  14. L

    What is the output voltage amplitude from the amplifier in the given circuit?

    The circuit in the figure is driven by a 9 mV amplitude signal generator with an output impedance of 2 kΩ. What is the output voltage amplitude from the amplifier? So what I did basically is use the formula Vout = -R2/R1 x Vin So.. I know Vin is 0.9 V (9mv) and R2 = 12 R1 = 1 that...
  15. E

    Engineering Finding Output Voltage: Maths & Graphs

    Homework Statement I need to find the output voltage mathematically or graphically Homework Equations The Attempt at a Solution My approach : as long as the Vi is < 9.3 V , the diode D1 will be ON because in that case VA will be < 10 V and current can flow through 10k resistor...
  16. E

    What is the mathematical or graphical representation of Output Voltage?

    please tell the output voltage mathematically or graphically
  17. J

    Transformer output current question

    hello, I'm super noob. My understanding is not yet clear. it sounds like folks here are describing current as something that's output by the transformer, but i thought current does not exist until there's a load. so my question is, how big of a load can it handle (not sure what 'big' really...
  18. Z

    Fortran [FORTRAN] Strange Characters in output

    Hi, I am trying to compile a code that should work fine, but I am getting errors and also some odd characters are printing on the screen. This is the output: ENTER INPUT FILE NAME (INCLUDE EXTENSION NAME) blisw.inp YOUR INPUT FILE IS blisw.inp...
  19. T

    Program not giving a fully correct output :s

    Hi guys~ I'm currently learning C and we've been asked to write a code where a decimal-system number gets converted to its corresponding binary form BUT, you know, when we do it manually by the 2-division method how the order of the binary numbers go from down to up...? yeah that is the part...
  20. S

    Inductive generators, what is their output compared to their horsepower rating

    Let say I have a 3 phase ac motor rated at 40 hp. Now I'd like to be able to convert this to act as a single phase induction generator (I hear is possible but I don't know much about it). driven by an ICE at around 1800 rpm. What would its power output be in kilowatts. Or more importantly...
  21. P

    Fortran [Fortran] String variable for output filenames

    This is the troublesome part eLeftOutFile = 'data/ElonL'//fileNameSuffix(0:25)//'.dat' OPEN(754,FILE=eLeftOutFile,STATUS='REPLACE',ACCESS='SEQUENTIAL') First off, fileNameSuffix is a CHARACTER(len=40) just to be safe, I am just cutting it off, since those are the relevant parameters...
  22. E

    Determine output sequence given input sequence and state table

    Homework Statement For the state table shown below, show the output sequence when the input sequence is as given below. Assume the machine starts in state A. x : 1 1 1 1 1 0 1 1 1 0 1 1 0 0 1 1 1 1 0 1 1 z : x>0...1 A A,1 B,0 B A,0 C,1 C D,1 A,0 D A,0 B,1 Homework Equations N/A The...
  23. L

    Integer part of the output of a division

    hello there! i need to get the integer part of the output of a division in MATLab i.e. 23/5=4 (and the remainder is 3) what function should i use?
  24. S

    Output voltage of Crystal Oscillators

    I am currently building a circuit that produces a 200khz signal with a potential difference of 3 - 12 volts, depending on the force applied to a strain gauge. The input voltage is a 12V, 50hz source. With no force applied to the strain gauge, the output is to be 3V and 12V at breaking force...
  25. R

    Proving a system is LTI based on input and output

    edit: you aren't proving it's LTI, you proving it COULD be lti Homework Statement the question: could the following system be LTI? x(t)=-5cos(2t) --> y(t)=exp(-2tj)Homework Equations the chapter is about eigenfunctions of LTI systems, which are of the form exp(st).The Attempt at a Solution So...
  26. X

    Understanding the Image output in Frequency Domain

    I need help understanding how frequencies are distributed when taking the FFT of an Image and how can i determine those frequencies, I really need a detailed and easy tutorial with practical example to understand it. When we take the FFT of a Sine/Cos wave we can easily see its frequencies in...
  27. S

    DC motor and AC generator's output

    To increase a DC generator's turning effect, we increase the number of turns of the coil. How does this increase the turning effect? Will it concentrate the field lines or will the force acted on each coil be added to each other to increase the force on one armature? I think both happens because...
  28. A

    Fortran How can I fix incorrect output from my Fortran subroutine for a test matrix?

    Hi all, So I have a program that calls a module that contains a subroutine so I can make a matrix. When I write the matrix in the subroutine (commented out part in module) I get the right output, but when the main program tries to output it is some insanely small or large numbers. I am new to...
  29. Y

    Where Does the Formula for L_0 in Audio Output Transformers Come From?

    I am reading audio output transformers. This is a paragraph from RDH4 and I don't understand where the formula of L_0\; come from. Please see attachment.
  30. K

    MATLAB Matlab fprintf % usage in output data

    Matlab fprintf "%" usage in output data I want to save data into a textfile, but I will again need MATLAB to read that text file, in which case, I would like to have my header-text of the data table begin with '%" so that when I am reading from than file, MATLAB will ignore header. I am...
  31. N

    Modify input file name and print as output [C]

    I have a question, how can I make an output file that takes the name of the input file and replaces the .txt extension with "_out.txt"? For example, an input file with the name “new.txt” would result in an output file named new_out.txt”. my friend told me to use strcat, but that just adds...
  32. E

    BJT small signal analysis: output resistance

    Hello, I'm studying BJTs and I have a doubt about deriving the output resistance in the small signal equivalent circuit. Let's consider the circuit below: To derive the output resistance, I'd write the following KCL: i_x = i_{rc} + i_c at this point, every example I've seen says R_o = R_c...
  33. S

    Fortran [Fortran90] how to write several output into one file

    hi all, Currently I am doing 2d fdtd (TMz mode) modeling. I expect to have output for Ez, Hx and Hy in one file, which is mean that the output will be in 3 column. But I don't have any idea how format it. Anyone can help me? Below is the code !problem 3.9, Taflove chapter 3 !to model 2d...
  34. T

    Transistor output resistance and thermal voltage

    A couple questions: I'm in the process of making some small amplifiers and using bjt's in the small signal realm. I have used bjt's as switches for quite a while, so I am quite familiar with their basic operation. I was reviewing small signal analysis trying to refresh my memory about how...
  35. B

    Solve 3 Bit Grey Code Decoding: Output Logic

    Homework Statement Given that the variables A[2:0] form a three bit grey code to represent numerical values: i) Write down all binary combinations for A[2:0], in ascending order of numerical value ii) A three bit grey code to decimal decoder is to be designed, where the outputs X[0:7]...
  36. marcus

    Cosmo calculators with tabular output

    Experience and conventional wisdom say that whenever there is a really good idea ready to makes its entrance it often occurs to several individuals or groups. That might be happening, or going to happen, with online cosmic model calculators. So I'm hoping to hear comments about this including...
  37. S

    Power output of a coal burning power plant

    Homework Statement A coal power plant with 30% efficiency burns 10 kilograms of coal per day. (Take the heat of combustion of coal to be 30 MJ/kg) a) what is the power output of the plant? b) At what rate is thermal energy being discarded by this plant? c) If the thermal energy is carried...
  38. N

    Designing a NOT-gate Circuit with LED Output

    Hi I am trying to design something similar to a NOT-gate (very simple), and I have been following this figure: http://en.wikibooks.org/wiki/File:Electronics_TTLNOT.PNG. My question is the following: Say that I instead of grounding the lower branch want to send a current through it to e.g. a...
  39. R

    Output short protection circuit

    I am making a totem pole digital output of 1.5-23v. i was searching for a protection circuit for the output short to ground and +24v dc. please help me out by sending a diagram of the circuit if possible.
  40. N

    Calculate the rate of energy output of the sun, taking the sun as a blackbody

    [b]1. The surface temperature of the sun is approximately 5800K. Given that the radius of the sun is 6.96x108m calculate the rate of energy output of the sun, taking the sun as a blackbody. [b]2. H = εσAT4 [b]3. Surface temp = 5800K, Radius of the sun = 6.96x108, Emissivity of a...
  41. A

    Double Insulated PSU, 14vdc output, 150vac potential

    Greetings, I'm obviously new to the forum here so greetings to everyone. I am here because I have a problem with some equipment relating to my job and I'm trying to learn as much as I can about it and the effect that it is having on our equipment. I'm not looking for a 'solution' so much as...
  42. V

    Solving for Data: Formula with OUTPUT Provided

    Hello fellas. I have this formula that encodes data: OUTPUT = (Data * 7) + (Data * 2) + 8 So in this case, if I have the OUTPUT, what is the data. What formula can I use if I have OUTPUT to get Data? Thanks much!
  43. D

    How to calculate HP pump water output flow

    Hello everyone, I'm new here, sorry if it's off topic. I need to buy high pressure pump and was asked by supplier these questions. I'm a sales person and physics is not my very strong side :( I've got some answers on it (posted below questions). How can I calculate question 6? If it's...
  44. U

    LaTeX How Can I View the Output of Latex Code for Partial Differential Equations?

    I'm writing a scientific paper and I need to put in some partial differential equations ...I can generate a latex code for them using a software called 'texmaker' but in order to make them presentable in the form of proper partial differential equations, I need to see the output of the latex...
  45. B

    Is Your Linear Regression Analysis of Electric Car Energy Consumption Accurate?

    Hi there, I have performed a linear regression of the energy consumption of an electric car on 7 measured parameters. They are 1. Max acceleration 2. Average Acceleration 3. Average Velocity 4. Distance travelled 5. Standard Deviation Acceleration 6. Standard Deviation Velocity...
  46. N

    C language: I cannot find the output file.

    What is wrong with my code? #include <stdio.h>int main(int argc, char *argv[]) { int i=0; FILE *fp; char fname[100]; sprintf(fname,"%04X.txt",i); fp=fopen("fname", "w"); fprintf(fp, "hello world!\n"); fclose(fp); }
  47. I

    Help Input output characteristics of BJT

    help! Input output characteristics of BJT I have attached an image of the graph. Does this graph apply for both npn and pnp transistors. I have asked this because for pnp, the collector(c) and base(B) terminals must be reverse-biased at the active region, and B must be at a higher potential...
  48. T

    Scaled" & "Inverted" in Picoammeter Analog Voltage Output

    Meaning of "Scaled" and "Inverted" in context of picoammeter analog voltage output I'm trying connect a picoammeter to an oscilloscope, and I noticed that its analog voltage output was described as "scaled" and "inverted". I'm just curious as to what that means about the oscilloscope is going...
  49. J

    [C] Output of this simple program

    Hi, its been some time since I did C prog (its not my field), but I do recall somethings from what I did 4 years ago. What would be the output of the below prog (I know its a simple one), but I think it would execute for i = 5,6,7,8,9,10 (6 times), the printf statement. Yet some of my...
  50. A

    Calculating Heat Convection Output: Clarification Needed

    I need some clarification regarding the following formula: Qconv = Pn x Qs x b x ϕ this equation is used to determine the cooking appliance's convective heat output in kw, 'b' and 'ϕ' are coefficients easily determined. I am confused whether to use the actual capacity of the appliance for...
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