Output Definition and 1000 Threads

When I connect 3V negative and 3V postive power supply to an OP07 op amp and I Connect a voltmeter to OUT of op amp and GROUND the voltmeter shows -1.8 volts why? I have connected anything to input I even tried shoring the input and this voltage is too high to be offset voltage. I Tried two...

Hi I was hoping someone could tell me the approx. amount of radial force needed to keep a 10000W generator turning while producing maximum output if there is a 1ft pulley connected to it that does the turning. Thanks

Homework Statement What would be the output of a transformer plugged into a DC voltage source by mistake? Homework Equations N/A The Attempt at a Solution Judging from the phrasing of the question, I am assuming that a transformer should not be plugged into a DC voltage source...

I need help understanding a few different items regarding electromechanics, and I'm not really sure where to start. Though the figures I have provided immediately seem impractical (coil melt down, coil explosion due to excessive rpm, inside dimensions exceeding their respective outside...

How do i plot an output response curve when input unit steps are (undamped natural frequency is normalised to 1): damping ration = 0, 0.1, 0.4,0.6,0.8,0.9 1 and 2 1) how do i plot a 2d plot for all curves on same graph. Time scale 0 - 10, steps of 0.2 seconds. 2) How do i make use of a 'for...

Hi, I was studying calculus and I had a problem while checking my results. I came to the following result: \int_{\frac{\pi}{6}}^{\frac{\pi}{2}}\frac{1}{\sqrt{\sin t}}\:\mathrm{d}t = \sqrt{2}\cdot \mathrm{F}\left(\frac{\pi}{4},\frac{1}{4}\right) \approx1.16817 However, Mathematica shows...

Hi I have a question to do with using PWM If for example I had a 1ohm load and a voltage supply of 4JC-1, I would get a power draw of 16JS-1, now if I had a duty cycle of say 50% I should get an average power output of 8JS-1. However if i thought of it as having an average current of 2CS-1 and...

We are using a DAQ (data acquisition) board for our project, that has only 2 analog outputs, but we need 4. It also has some digital outputs... Is there a way to convert the digital outputs into analog, and if so, what is it? Thanks

Hello Can someone help me with this? I've been struggling with it for some time and haven't found a solution yet. Let's say we have the circuit in the attachment. There is a number of inputs (4 in our case) and an equal number of outputs. The problem is: if at least one input is HIGH...

Hey there fellow engineers, I have a question to pose for a project I am carrying out. I currently have a GPS logger I have created myself and was wondering if anyone knew how to take the GPS data (in minimum NMEA forum- so just time and longitude and latitude values) and import this...

Hey, I'm a newbie trying to figure out a few crucial additions to my circuit I'd like some tips and suggestions.. Basically, I'm building a circuit that will produce a constant current to variable loads, I'm using a buck-converter model with a supply of around 10V, the inductance should be...

I am trying to write data to a .txt file and want each set of data in a column, so I want 2 columns. However I am currently only getting the entire data set in one big column. I am trying to output the year and the rainfall for that year into a .txt file. Can anyone help me with this?

I have a question. I set up a voltmeter and and ammeter (properly connected in parallel and in series respectively) so that when I input power into a motor in the form of DC current, both the voltmeter and the ammeter read positive values. Then, I removed the voltage source (i.e. battery)...

I am trying to charge a battery using wind power! but i can't seem to find anything telling me how i can determine the power output coming from the generator, when all i know is the wind speed.. i know that the blades on the fan will have to be small but using the right gears with the high speed...

Suppose that the system of figure (a) has the input x(t) given in Figure (b). The impulse response is the unit step function h(t) = u(t). Find and sketch the system output y(t). http://qaboard.cramster.com/answer-board/image/a4d35f0d5eef154398161f9124b69a59.jpg...

Hi, I looked around in some forums, but couldn't find a good answer to this problem: my programmes produce several output files. When the programm is finished, I add certain simulation parameters to the file name, so that I see later, to which simulation run this file belongs. (for example...

I'm having difficulty visualizing what the output of an antenna looks like. Would someone care to explain? This is where I am stuck. Imagine we have a point source that transmits energy. If at time t0 a pulse occurs which outputs a spherical wave, and some time later (say t1) another pulse...

Hello every1 I hav a basic question bout Design of inverters(Voltage source inverters). Wel Actually what does designing mean? I hav to design a inverter whose output Peak voltage is 50v. The input DC voltage wil b around 55V.I'm using single phase full bridge inverter And i'll b using R...

Homework Statement Rosie (mass 58 kg) pushes a box with a horizontal force of 170N (38.216 lb) at a speed of 16 m/min. What is Rosie's power output? Answer in units of W. Homework Equations Work/Time = Power MGH/T = Power .5MV^2 = Power The Attempt at a Solution 58(.2667...

Hello all, Im new to the site so please don't hurt me :blushing: ! My final goal is to measure linear speed of a pedal powered car, and send the speed wirelessly to my laptop which will record the speed profile. My problem is that I can't find a sensor that will measure angular...

How is high impedance output implemented in logic gates? If transistors(BJTs) are used to implement a Not gate, what would be the ckt when the output is high Z?

How do GM crops (both current and potential in the near future) compare with organic in terms of output per acre? How does it compete with such methods as Fukuoka Natural Farming, and other forms of permaculture?

Homework Statement A pump is to lift 8.00 kg of water per minute through a height of 3.50 m. What output rating (watts) should the pump motor have? Homework Equations The Attempt at a Solution I have no idea how to even start.

Hi guys, I am tryin to get my program to output multiple files with the name of the file dependent on a number of integer variables in the program, any help with this would be greatfully appreciated. Cheers

Is it possible to connect two alternators together to double the output voltage, is there a way to do this? Eg: Say two 12v Alternators connected to get 24v etc. Thanks

Hi, I'm familiar with tree traversal alogirthms, post,pre and in-order. If you give me a tree I can print out the specified traversal of that tree. However, one thing I can't do is build a tree from a given output. For example, on my last test, my prof gave me this Question: A pre-order of a...

Hey all, My bibliography is not showing up in the PDF output, and I'm not sure why.. The bib file is in the same directory as the the main tex file. I am using the command: \documentclass[a4paper,twoside,11pt]{book} \usepackage{calc} \usepackage{setspace} \usepackage{graphicx}...

Homework Statement The Sun emits electromagnetic waves (including light) equally in all directions. The intensity of the waves at the Earth's upper atmosphere is 1.5 kW/m2. At what rate does the Sun emit electromagnetic waves? (In other words, what is the power output?) The answer is...

A 2400 pound car ascends a 10 degree slope at 30 miles per hour. If the overall efficiency is 70 percent, the power output at 70 percent efficiency is 47.7 horsepowers. By the formula, Power=(force)(velocity) with 1 horsepower=550 ft*lb/s , the power output at 70% efficiency is 23.38...

Homework Statement A weightlifter is able to lift 250 kg 2.00m, in 2.00s. What is his power output? Homework Equations W=M x N P = W/Change t The Attempt at a Solution 250 x 2 = 500 (I thought that this was work) so then I divided by time (2.00s) to get power. The answer is not...

Homework Statement The rms output voltage of an AC source is 180 V, and the operating frequency is 90 Hz. Write the equation giving the output voltage as a function of time t. (Use t as necessary.) Homework Equations (\Delta v) = (\Delta V_{max})sin\omega t \Delta V_{max}= \sqrt{2}V_{max}...

Homework Statement You lift a 40 kg weight vertically 2 meters in 2 seconds. Your power output is ____. Homework Equations The Attempt at a Solution M = 40 kg A = 1 m/s F = ? I have no idea how to go further than this. Also, what is power abbreviated as? For example, force...

I have arbitrary input numbers, and an arbitrary output. I want a program to automatically give me a function (various constants and mathematical symbols) to convert from the input to the output. What's the best way of doing this? Are there any programs to do this for you, perhaps which use...

Hi. I joined to ask this one question..but who knows maybe I will stick around and learn other things..lol... I bought an electric 12v anchor winch which is designed to be used with a 12v car battery on a boat. I intend to use it to hoist my bicycles to the ceiling of my garage. However, the...

Hiya, Question 1: (Main question) I bought a lux meter while understanding very little about how light is measured. I'm hoping to measure the output of a laser in mW. I assume it's possible to do this at least to an accuracy of about 10-20% which is all I need? If so, please could someone help...

Hello everyone, I have a question that I have been unable to find an answer to. I am interested in salvaging a vehicle alternator in an attempt to create a homemade generator. I understand that household electronics' needs are measured in watts, but I can't seem to figure out how to calculate...

i can't understand why i get such an output?? int array[] = { 45, 67, 89 }; //1st ine int *array_ptr = &array[1]; //2nd line printf("%i\n", array_ptr[1]); //3rd line the second line links the pointer *array_ptr with the value of cell "1" but in the third line it should have print...

I need to be able to print the output from my c++ program, which obviously comes up in a dos screen. Is there an easy way to print this without writing it into the code? Any help would be greatly appreciated.

Homework Statement A bicyclist coasts down a 7 degree hill at a steady speed of 5 m/s. Assuming the total mass of 75 kg, what must be the cyclist's power output to climb the same hill at the same speedHomework Equations power = force * distance / time force of gravity = mass * gravityThe...

Hello, I am working on a sound/light installation at the moment and was hoping that someone on here might be able to help me with a question i have. I would like to use the composite output from a DVD player to control the intensity and hue of LED light (or 3 (RGB) if need be). So...

A top fuel drag racer with a mass of 600.0 kg completes a quarter-mile (402 m) drag race in a time of 4.4 s starting from rest. The car's final speed is 115 m/s. What is the engine's average power output? Neglect friction and air resistance. I know: Power = Work/ change in time W = Force *...

Homework Statement Water flows into a nozzle at 3.00 m/s at a pressure of 1.31*105Pa. What should the ratio of input to output diameter be if the flow is to remain steady? What is the flow speed at the exit? Homework Equations P_{{\rm{input}}} + \frac{{\rho v_{{\rm{input}}}^2 }}{2}...

I am building a 2 to 4 decoder with 7408 And gates and need to put LED's on the output as indicators, active high. 2 questions 1. Would I put a current limiting resistor in series with the LED to ground or put the resistor and LED from the gate output to Vcc? 2. The LED draws 30mA at 2V...

For a real world problem, I've been puzzling over the trend to go after very light-weight rims for bicycles. My BS in physics hasn't provided me with solid answers. I am a bit rusty. I have found a feeling of increased stability when running heavier rims and attributed this to an increase in...

yellow line: output of photodiode which detects an LED blue line: output voltage to the LED newfile1: the file without measuring using average of the scope. newfile6: the file with using average of 32 times of the scope. How to filter the noise? It's noisy, I find it's ok to use...

Hi, I have a product that needs a 6v transformer. However all I have is a 12v output transformer. Can I use this? and is it dangerous? Thanks Fialor

I am looking for a cheap device to check sensor function, the sensor is detecting at 120 rpm and should give a 24v output. If there is a circuit i could build my self that would be great. Thanks.

can u explain what hapens output circuit is open and no current is flowing through output coil? isn't it that a large current flows through the input?and the wire burns...i know it doesn't hapen...but why?when there is no back emf in primary?

Hello all, Is there anyone out there who can help me out? I have developed a drive system for a generator, but... the big but... in need to know how to build the appropriate stator for it. Assume this is of the windmill electrical generating variety, where magnetic coils produce AC...

Homework Statement The Vdc of Full Wave Rectifier (with diode) with midpoint configuration has been found to be 2Vm/(pi) and Vrms = Vm/sqrt(2) How about the Vdc and Vrms value for the full wave rectifier but with bridge configuration. The difference is the the peak inverse voltage...