Input Definition and 586 Threads

Hi I have a wish to "create" a battery that I can use as replacement for a regular power adapter. Main reason I want to do this is to get something that will be mobile with my PC (HP Touch Smart) Input: 100-240, 2A, 50-60 HZ Output: 19V, 7.9A, 150W What technical solutions am I looking...

How can I shouid write an input file for rutile tio2 in quantom espresso?What is atomic position in rutile tio2?

Hey guys, this is my first post here. So I'm learning FORTRAN, and I'm writing a trapezoidal integration program as a learning exercise. What I want to do is in addition to asking the user to input the range and precision of the calculations they'd like, I'd also like to be able to enter in...

I am working with Pspice student verison 9.1. Is there any simply way i can find out the input and output resistance in pspice? basiclly my opamp is same as this without Rg resistor Thank you

im looking for functions that do not require the user to press enter. such as, they press "a" and the program continues, instead of something like "a[enter]" when using scanf.

I invented a number system in 2008 and I've never shared it with the public I thought I might as well...I had my reasons at the time for inventing it, and i think it may be useful...although i invented it, it's features are really natural features of our universe itself, and are therefore much...

An electric motor with an efficiency of 78% drives water pump. What input power is required of the motor (in kW) to pump 22250 gals of the water from the lake to a storage tank 65 feet above the lake surface in 4 hours? Attempt : i know that efficiency = output/input but i don't understand, how...

hi, 1. could somebody explain me in very simple terms what are sourcing / sinking I/O. 2. In which cases i have to think about these things while interfacing. 3. i did lot of browsing and studied but every time i get confused, suggest me a simple lab experiment so that i can do each of...

If it is in inverting or non-inverting configuration, will the input resistance increase the mismatching of the bias currents, or will it only increase the error voltage? Please Explain like your talking to an idiot, I need to write an essay on this, and I don't know what to do! Also how...

I'm relatively new to C programming and I am trying to make a program to take and print the natural log of a number input by the user but for some reason my program always returns incorrect answers. For example I entered 1 as my number, and the answer came back as some ridiculously big value...

This isn't a homework question but the professor asked us why someone would choose to set the Rayleigh length of input radiation into an undulator to be the length of the undulator, instead of setting it to be half the undulator's length like normal. The best reason I could come up with is that...

Hi all. The question says: Use the RTL design process to design a system that outputs the average of the most recent two data input samples. The system has an 8-bit unsigned data input I, and an 8-bit unsigned output avg. The data input is sampled when a single-bit input S changes from 0...

1. A single phase half controlled bridge rectifier operated from a120V 60Hz ac supply. The load current with an average value of I is continuous and negligible ripple content. If the delay angle of thyristors is 60, calculate, i) The harmonic factor of the input current...

My assignment was to "create a Python script that will allow the user to input the starting value for the row and column of a multiplication table and then print to screen the table containing ten columns and ten rows. Include a header for each row and column" I was able to produce the...

op-amp --- input voltage Hello, I find op-amps very fun! And I understood mostly everything I was offered to study. But here is the thing. Why does the voltage has to be the same at the input leads? To be more specific. Lets say we have a inverting op-amp. And we have an imput Vin at -ive...

? Undefined function or method 'strike' for input arguments of type 'double' Hi all..I have some problem with a Matlab script.. The aim of my exercise is to plot the change of a derivative's price (a swaption) on the basis of the change of its principal parameters (for example the strike)...

[FONT="Arial"]Hi Shaft A has variable RPM, getting input from some rotating element (say X), ranging from 0 to 2000. The RPM of X cannot be adjusted or controlled. A has to transfer the rotation with limiting RPM of upto 400 to Shaft B. Is there a way to limit the RPM using a mechanism...

Homework Statement I'm having and issue with this problem, and I don't understand what I'm doing wrong, I really want to understand the material Write code that will print a multiplication table for 10 positive integers across the columns and 10 positive integers down the rows. Prompt the...

Hi everyone I am completely new to the Fortran. I have to make a program in fortran 90 to either add or multiply the matrix on user demand and ask user to enter the file name inorder to read the desired matrices. I came up with the the following code which does not read the program and...

Hi guys, I am trying to put a series of differential equations into sate space form. The problem that I have come up against is that I end up with a differential in my B term (control matrix) and I am unsure of how to deal with this. Is there an easy way of doing this? Does anyone have any...

I am writing a program using JOptionPane that asks the user to input a decimal number, and then outputs the decimal number in binary. The program then asks the user if they would like to convert another decimal to enter y/n (with case being irrelevant). I was able to ask the user for the decimal...

I'm currently studying transistor amplifiers and It is not entirely clear how impedance relates to amplification. For the emitter follower configuration, the book I'm reading implies that low output impedance means high voltage gain and, for any amplifier in general, high input impedance is...

Homework Statement I created a program that will calculate the factorial of the number entered and am having a hard time getting it to not accept decimals or fractions.#include <iostream> using namespace std; int main (){ int q=0; int number = 0; cout<<"Please enter a positive whole...

Homework Statement Hello all, there has been some debate in my class as to the output waveform for the following circuit: Others say that the output will always be zero.

Homework Statement This is assignment is on FORTRAN 90: In an assignment i have, i am to enter a date in the format DDMMYYYY, and its suppose to compute and display the day of the week that date falls on (based on a given algorithm). I was able to code a program that would give me the right...

Hi, I am doing my Extended Essay in Physics(so yeah, I am doing the IB). I am really interested in taking up electrical engineering at university, and so, I had done an EE in piezoelectricity. I have taken the crystal from a barbecue lighter and connected it to a vernier( a machine that can...

And what is the minimum value? ( -b/2a is for a maximum problem, but how do you get through this kind of problem?)

Hi, I have a couple questions regarding a homework problem and would really appreciate some help. Consider the lossless 50ohm transmission line shown below, which has an LC circuit inserted at some point along the line. If I want to find the input impedance how would I approach this problem...

Hi, If I powered a permanent magnet generator like one found in a wind turbine, with let's say with a 1/2 hp A/C motor for example and directly coupled them together or used a gear reducer to increase the torque and rpm's, would the output watts created by the generator be greater than the...

Hi, Was wondering how dual input power strips work. I've seen them in data center racks, they have 2 mains power inputs wired to separate mains circuits. if one breaker trips then the strip still receives power from the other circuit. Do these strips have both power circuits wired to all the...

I am reading a book on Control Theory by Norman Nise. I don't get his description of forced and natural response based on poles and zeroes. I have posted a screenshot of the page http://www.flickr.com/photos/66943862@N06/6134272368/sizes/l/in/photostream/" . I understand upto Eq 4.2...

I would like to input a word in the fortran command line rather than a number. For example, if I wanted to exit a program with the word 'exit' how would that be done? Thanks for the help :D -Glenn

Hey guys/gals, The block diagram attached is a PI controlled robotic joint system where: G(s)=Kp+(Ki/s) P(s)=48500/(s^2+2.89s) R(s)= joint’s desired angular position C(s)= joint’s angular position D(s)= external disturbance G(s)= PI controller ess= Steady State Error My...

Hi I write M-file that call 'Program.exe' by SYESTEM command and go to the Program.exe Environment .now i need apply a command of 'Program.exe'. But i cannot control application with Matlab because Matlab go to 'Program.exe' Environment and 'Program.exe's command only is Executable and it is...

What is the meaning and use of input current in logic gates? Also meaning and use of quiescent supply current.

Hello. I have a very quick op amp question. I'm trying to understand an omp amp. My question is will vout of an op amp go to zero if the inverting input is greater than the non inverting input ( even if there's a negative/positive feedback)?

Hi...can anyone tell me whether there is a decade counter which has only 1 input, 10 outputs and an up/down clock?

Hi all, Love the forum, just signed up but have been reading for a while. I'm not an EE and I am working on some image processing, so I need some hardware help. What I want to do is to have ~20 USB webcams, of which any 4 are selectable to feed into MATLAB. I have the software side running, but...

Hello all, I wanted to know if there was a way to read in numerical data on the same command line on which you execute a file. I know you can do that for i/o files like: test.exe < file1.in > file2.out But I wanted to know if there's some similar notation that can be used for floating...

Hi All, Let me preface by saying this is my first post, but I'm very glad to have found and joined what looks like a great community here. Also I have no Fortran experience, so please bear with my greenness: I'm trying to resurrect and use a code written by another engineer in our...

Homework Statement I have a trouble understanding what would be the output when for example we say let's input the signal x(k*n) or x(n-n0) to the system... this has given me problems when having to solve systems for which I have to check the property of time invariance suppose we have a...

in regards to power adapters, mainly the brick-type ones that come with laptops and external hard drives, how is the output current greater than the input current? for example, i see a laptop power brick with the following: input 100-240V~1.7A 50-60Hz output 18.5V == 3.5A 65W how...

I'm feeding the current in pulses via 50v 6800 mfd capacitor. Will it destroy the ignition coil instantly, or will just overheat it? It won't be for automotive use but for general high voltage experiments. As long as instant destruction is a remote possibility, it's easy enough to mitigate...

My gfortran compiler gives me the following message when I try to open a file in order to read it:Fortran runtime error: No such file or directory logout The line in the program where this file is is written in this way: OPEN(UNIT = 7, FILE = 'GPROP.DAT', STATUS = 'OLD')...

I am doing a tacho-meter of a single 12V power supply, it is meant for a car engine. However in real life the power supply from an real vehicle fluctuates between 10-14V. In this situation it is clear that some form of power supply regulation is needed. I am currently considering a...

I was going thu AM26LS32 diff line receiver. The data sheet has a ckt diagram for the input stage. But I don't understand it. I have attached the input stage from datasheet(page3) The input stage actually looks like a push pull output stage. What is the function of the 100K resistors and...

Input a polynomial into FORTRAN? Hello all, I took a Fortran programming class last semester and can write Fortran well. However, I never recall anyone ever asking if there would be a way to input a polynomial into the command prompt. I'm assuming there is not. It would be great though. I have...

Hi, :smile: Please have a see Example 1-5 on the given link: http://img854.imageshack.us/img854/8376/inputimpedance.jpg The example mentions input impedance. What is it in simple words? The book says: Because this input impedance is across the measured terminals , a small current flows...

Keyboard input does not match keys - Please help! I currently am having a massive issue with my computer. The input keys do not match the keys on the keyboard and all input goes to hotkeys. I have to use on screen keyboard to type. The keys themselves worked, but are automatically redirected...

Homework Statement Hey. I've posted a few questions around here lately, and really appreciate any help! thanks Right, attached is an image showing a simple pump system. pump inlet gauge pressure = Pi = -34.2 kPa nozzle diameter = 5cm rho = 1000kg/m3 Calculate the flow rate 2. The...