Circuitry Definition and 47 Threads

I have been given an electrical chain hoist to repair. The symptom is that it suddenly stopped working. I have checked the motor's windings and they each show similar DC resistance of 0.0018 ohms. I have attached the schematic (dunno why it was rotated 90 degrees during the upload). The hoist...

Here is the internal circuit of a 741 op-amp - Here is a HSpice model I found in the educational section - Both are essentially the same, keeping aside subtle differences. I am yet to understand the technicalities of an op-amp, so I would like to analyze the circuit using the first picture...

Dear friends, I am in a search of a temperature controller for 12V, 40W ceramic cartridge heater! I can not change the heater because of my application. I want to purchase a simple PID temperature controller available in the market. But I am not sure whether they can provide me the 12V output...

Hello, I am interested in the circuitry of energy conversion, such as solar, thermal, etc. How does the converted electrical energy get stored, for example, do they use supercapacitors? How does it then get applied for general use? Do you have any documentation or circuit diagrams for this?

I am designing a device, which will utilize an electric field. The question I have run into is whether or not the current is treated as the charge enclosed for Gauss' Law, or if there's another way I would calculate it. Also, am I correct that the voltage of the circuit would be different than...

The above is a circuit i found on the net regarding amplification of volume. I needed to know if increasing the potentiometer resistance (between "cold" and "wiper"; terminal 1 and 2?) in the circuit would increase "volume" Also, i could use a potentiometer resistance ( between "cold" and...

I'm considering making a plastic melter / extruder for making my own 3D printer filament as opposed to buying the spools of it. The basics of the project are simple, but the hard part (for me at least) is making a heating element that has a control on it so that I can turn the heat up or down...

Homework Statement So, for a school project I have to make a resistance soldering iron. As far as I know, this requires a high current going through high resistance wire (such as stainless steel in my case). I need to make this run from a standard 120v 15A wall outlet. I have figured out so far...

I am wondering whether it would be possible for the analog circuitry itself to change DURING the time an analog computer does computations. Over and above the above mentioned question, is it possible that the circuitry itself can change DURING simulations, while this change in the circuitry is...

Homework Statement car's battery has voltage (E) 11,5 volts and internal resistance of 0,040 ohms. battery's charge is 20 amperehours (20 Ah) How many ignition attempts of the car can be made, when the charge can be allowed to fall to 15 amperehours. One attempt of at engine ignition...

I have a number of questions on how circuits really function - my class just found itself looking at circuit diagrams and voltages without any explanation of the basics of how circuits actually work. 1) How does the concept of electric potential difference between two points, like with a point...

Today, I've been looking into TFT LCD display tech for a bit, trying to figure out how pixels are actually colored on the screen. - A) Out of necessity, because I'm trying to build a small ARM microcontroller powered board with a display on it. B) And out of curiosity, because I don't really...

Hi guys, I know this sounds crazy but I do not understand why household circuits are grounded. It is this grounding that causes more harm than good in my opinion. I understand the need for it, e.g. if your washing machine's hot wire shakes loose and contacts the housing and it weren't...

Homework Statement Determine the center frequency and bandwidth of the bandpass filter. Homework Equations center frequency of bandpass filter = ωc occurs when the magnitude of H = 1 H = V0/Vs Center frequency occurs when Im(Z) = 0 Zc = 1/(jωC) = 1/s ZL = jωL ZR = R I don't know a formula...

Homework Statement Homework Equations KVL: ΣV = 0 KCL: ΣI = 0 v = iR The Attempt at a Solution I started by removing the independent current source to leave an open circuit. Then I attempted nodal analysis at nodes v1, v2, and v3: KCL @ v1: (v1 - v2)/10 = v1/40 KCL @ v2: (v2 - v1)/10 -...

Homework Statement Homework Equations Ohm's Law: v = iR KVL: ∑ V = 0 KCL: ∑ I = 0 Linearity: kiR = kvThe Attempt at a Solution Okay, so to apply superposition, I'm supposed to turn off all independent sources except one. I began by turning off the voltage source, and I then I used KCL to...

Though I understand the basic combinations of resistors, emf and capacitors, both in parallel and series, complex circuitry questions always baffles me. I would like to know what are the key points? I mean important points to be kept in mind. What are the common mistakes? What are certain tricks...

Hi there, I'll try my best to be descriptive. I'm looking for as much information as possible on the limits on current technologies in producing copper circuitry. I had a nice conversation the other day with a member of my research group and he was telling me about the demand for the ability...

I'm given that i1=5.4A and i2=1.5A. I know that I need to apply mesh-current and then nodal-voltage analysis, but I have never dealt with two current sources. It seems like however I set it up, I am missing a piece. My first attempt at a KVL equation using mesh analysis incorrectly...

Evening all, I'm trying to pick out a suitable DC-DC Converter for our low power gate driver circuitry and I'm unsure about a number of different things. First some background on the circuitry and what the DC-DC Converter is needed for. To date, we've designed, built and tested a low...

I was thinking of powering a microcontroller directly from a buck-boost converter, but after doing a few calculations I ran into the following problems: Ringing when switching on/off Current rise time You can get the ringing down with a snubber. The current rise time however is a big...

Hi,dear engineer fellas. Here is my query : We are team of students who compete in international FSAE competition-that is,we are making a racing car if you will.The engine is motorcycle engine. Our team is responsible of the different circuitry . Funny stuff is,we are all mechanical engineers...

I am making an amplifier with 2 lm4780 ic The gain is set by a resistor between the output and negative,I want to use a potenciometer to be able to adjust this, so my question is: will lowering the ohms lower the output or will increase the output or what?

Homework Statement I'm working on a project for my circuit analysis class in which we designed a circuit that involves a wheatstone bridge, takes the voltage difference and then amplifies it to a useable level. I am past that phase of the design, I have a working circuit for that on a...

Typical VC: http://goo.gl/Z4Dbg I have that guy there or one very similar. My question is how does one hook this up to the inductor? Forget, for now, the rest of the circuit. How do these two piece fit together? The bottom feet (there are two on each side) I assume take the positive...

How does a CPU send information to memory locations - physically? I know in software you can reference memory locations. I'd like to know how a CPU references them? I understand that it symbolizes a memory location using bits (00000101 = 5) but - how does that string of bits work in the...

http://www.nytimes.com/2011/03/01/science/01compute.html?_r=1&pagewanted=print So - a question. Once this infrastructure is in place, do we have to revise all the algorithms we use? Just as we have to revise all of our algorithms when we're programming for parallel processors?

Hi I'm a layman so please keep your reply as simple as possible. Thanks. They say that a CPU has built-in circuitry to do simple arithmetic operations such as addition, subtraction, etc. and logical operation such as greater than, less than, etc. I don't understand how could some...

howdy, I have never worked with superconductive circuitry, nor do I know of it's use much past MRI machines with large coils and in its research for transmission lines. What if you were to make a superconducting capacitor, and place it in parallel with a superconducting coil to make a...

Hi Everyone, I am trying of constructing a circuit but i do not have much electrical knowledge to put me through this. I hope someone here could provide some advice for me. Here it is: I have a circuit that is powered up by 230VAC (main). I am trying to tap a voltage (205vdc) somewhere...

Can anyone tell me what the most standard way of changing the frequency of an AC power supply is? Can it be done with circuitry or does the method of generation need to be set at the desired frequency?

Homework Statement http://i967.photobucket.com/albums/ae152/timmy_064/circuitryprob.jpg2. Instructions: Find the unknowns : V1, V2, V3, i1, i2, i3, i4 i wasn't able to solve this problem due to the circuit containing 2 batteries. its confusing. can someone help me. please. thanks. EDIT: Since...

Hello everyone, this isn't homework so I figured I'd post it here. I want to learn basic electronics, I mean, being able to move cables and diodes around is not only interesting but useful, I've seen a few diagrams on how to build certain types of guitar/bass pedals and/or amps and such and...

Design of precision circuitry? I'm currently working on a circuit that is so sensitive that if I even so much as breath on it for just a moment, it becomes completely useless as my signal will become completely saturated. While the circuit works very well (when I'm not breathing on it), even...

Hello everyone, I’m a first time poster here on the PF and I come to you, the community to help me and my team-mate in a little project we’re doing. We’re building a rail-gun and we’ve now encountered quite a few problems. I’ll try to make my questions as simple as possible for easy...

if i used batteries instead of a power source which circuit (series or parallel) would drain the batteries faster and why THank you.

I want to modify a circuit by adding a stronger drive motor. The circuit is a PCB receiver which is attached to two motors, one which steers a car, one which drives a car. The previous drive motor needed 2 x 1.5v batteries. The new drive motor needs a 12V lead acid battery. This means...

hi, I am wondering if anyone can answer this question of the following circuit setup, thanks: an AC source connected parallel to a volt meter, together in series with an ampmeter, then series with some sort of device. No numbers are given. Volt and Amp meters are both ideal. What is the...

Ok this is a practice problem for the upcoming SAT physics subject test. I was unable to do much... If point A was connected with point C, what would happen in the circuit? Can you please give a description involving the total current, the current and the voltage across each juncture, and...

I'm a mechanical engineering student but I'm tasked to do up a electromagnet circuit..any help willl be greatly appreciated! I need to be able to vary the strength and direction of the field of the electromagnet. I have absolutely no idea how to go about doing this because i almost never...

Electrons traveling in a circular path of a radius 2m at a rate of 1.0*10^6 revolutions per second are diverting into a region between two charged plates iwth a potential difference of 40V. These plates are 3.2cm long and are separated by 8mm. As the electrons emerge from the region between...

Does anyone know what technically went wrong in the sensor circuitry on board the shuttle. All I know is the liquid H2 sensor shuts off the external booster when the fuel becomes critically low. During the pre-launch test the sensor indicated the booster was low on fuel, however the tank was...

After everyone in our class got less than 50% on our first physics test this term, (AC, magnetic flux, frequency/oscillations), our teacher decided to give us a retest. Though, he hasn't gone over anything else, so i thought i'd ask a couple questions here. 1. I was taught that Inductive...

I'm having difficulties understanding the concept of power and how you generate it in a circuit. Mainly I'm uncertain about how electrical energy can be used to produce power and what are the conditions for producing it (are resistors required?) Would someone be so kinda as to give me an anaolgy...

I am doing a school project on the physics involved in smart bombs. I really need some information on what types of circuits they use. Also, any information on the ways in which they transmit their data would be helpful.

I'm going to feel kinda dumb once the answer to this question is revealed. But I can't seem to get the proper answer. The question is: What are the values of I1, I2, and I3 in the circuit? The ciruit looks like this: 20.0V I=positive terminal |-------I|-------| |...

I am a sophmore in high school and I work as a lifeguard over the summer, and a great deal of my time is spent sitting around doing nothing when the weather isn't ideal. I haven't taken physics yet, but I play guitar and I'm heavily into modifying it to get the best tone possible. Through...