| Subject | Date Asked | Expert |
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| light switch in laundry room | 3/16/2010 | Carl Lewis |
Q: My laundry room backs up to an entertainment center in the family room. Every time I turn off the ...
A: There could be many causes. firstly, it may be that your light which you are turning off is a tube ...
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| generator | 3/10/2010 | Carl Lewis |
Q: Is it safe to plug thing such as a plasma TV or laptop into a generator?
A: It is "safe" to plug a Tv into a generator as long the output voltage i scorrect and the generator ...
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| Sharp IR Modules | 2/7/2010 | Faraz Nizamani |
Q: can you help me out with Sharp IR Modules? Im looking for its applications. Jay
A: Greetings Jay, You can use Sharp IR Modules, for making Infrared beam barrier as well as a ...
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| Laptop DC ratings | 2/7/2010 | Carl Lewis |
Q: I have bought two laptops with the same motherboard. Laptop A is in good condition except for a ...
A: My understanding is that the Amperage rating on the case for the laptop is the rating for the laptop ...
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| phase angle | 2/3/2010 | Carl Lewis |
Q: An RC circuit has a capacitance of 0.015 uF. The resistance is 52 Ohms. What is the phase angle at ...
A: For a series circuit. Phase angle can be found by R/Z. where R is resistance and Z is impedance. ...
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| Xl and Phase Angles | 2/3/2010 | Carl Lewis |
Q: Suppose a coil has L = 689 uH at f = 990 kHz. What is Xl? Suppose an RL circuit has an ...
A: Ok Xl is inductive reactance an can be found by Xl= 2 pi F L . so Xl =4.2858 Kilo Ohms. To find the ...
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| resistance | 2/2/2010 | Faraz Nizamani |
Q: sir i want to know why does the resistance of a conductor increase with inrease in temperatur and ...
A: Greetings Katrina In Metals Electrons travel from one parent atom to another under the influence of ...
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| electronics devices | 1/31/2010 | Faraz Nizamani |
Q: sir, please tell me about motion of charged particles in electric field, and related derivations to ...
A: Id suggest you to go through Mahesh Nookala's article on "Motion of charged particle"-electrostatic ...
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| Inverters in Africa | 1/22/2010 | Faraz Nizamani |
Q: I am working with a situation in Nigeria where the power goes out all the time. It is also 240? I ...
A: An inverter takes DC power (battery or solar, for example) and converts it into AC "household" power ...
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| life span of broadcast transmissions in outerspace | 1/1/2010 | Faraz Nizamani |
Q: Are these radio and TV transmissions traveling in space forever, or do they eventually fade away? ...
A: New year greetings to you too :) and thanks for rating.. Antennas are used for retrieving that ...
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| life span of broadcast transmissions in outerspace | 12/30/2009 | Faraz Nizamani |
Q: Are these radio and TV transmissions traveling in space forever, or do they eventually fade away? ...
A: Greetings Robert! Answer to Question 1: Radio or TV Transmissions, use Electromagnetic Waves(EM ...
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| Field | 12/30/2009 | Faraz Nizamani |
Q: Assalamalaikum, I had this doubt while revising my portion..... Why can't a magnetic field be used ...
A: Yes! but not when you have an Alternating Current. Cyclotron, also uses the AC as external source, ...
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| Field | 12/30/2009 | Faraz Nizamani |
Q: Assalamalaikum, I had this doubt while revising my portion..... Why can't a magnetic field be used ...
A: Walaikumassalam Ya Akhi :) The force applied by the magnetic field is said to be a "Conservative ...
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| electrical and electronics | 12/24/2009 | Faraz Nizamani |
Q: What is the difference between electrical and electronics?Explain me in detail please...
A: Greetings! OK!Electrical engineers deals with "Large Power Applications", like 'utility' and ...
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| Watts, Volts, and Amps | 12/18/2009 | Faraz Nizamani |
Q: I was just wondering what Watts, Volts, and Amps are. I was just buying lightbulbs and realized that ...
A: Greetings Tuck Watts, Volts and Amperes(or Amps) are the three most basic units in Electricity. ...
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| (bovine) animals electric fence electrocution | 12/10/2009 | Faraz Nizamani |
Q: I am a veterinarian, working for insurance companies & courts in Belgium. I often have to deal with ...
A: Greetings Pierre The fences that are usually used, primarily use voltage. Which is sensational to ...
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| binary processing | 12/9/2009 | Apurv |
Q: You seem to have knowledge based on electronics and microprocessors. So I was hoping if you could ...
A: Ans1: If you want to know about digital memories and digital processors, i suggest you take a look ...
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| Adaptive Control System and Robust Control System | 12/8/2009 | Faraz Nizamani |
Q: What is the difference between Adaptive and Robust control system ?
A: Greetings.. Both deal explicitly with uncertainty in its approach to controller design, but the ...
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| about star delta starter of a motor | 12/6/2009 | Faraz Nizamani |
Q: Would pls supply me the control circuit diagram of star delta starter of a motor?
A: greetings! This page may help you ...
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| Variable Voltage Regulator - high current | 12/4/2009 | Faraz Nizamani |
Q: Good evening, I learned electronics before the advent of ICs, so bear with me. I recently ...
A: Greetings Jack. You would need LM723 IC for that, with some modifications in circuit. It can ...
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| CAPACITORS | 12/2/2009 | Faraz Nizamani |
Q: Can a Capacitor be made to expel it's charge over a long period of time like a batter ?
A: Greetings Al It can be used as a temporary battery when disconnected from its charging circuit. But ...
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| mini motor | 12/2/2009 | Faraz Nizamani |
Q: I don't really know who to ask for help about this so this question might be out of place. I'm ...
A: Greetings Adam You would have to see the power ratings. Your half (1/5) horsepower motor can lift ...
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| Electricity | 12/1/2009 | Faraz Nizamani |
Q: This is a question about Christmas holiday lights. The lights are miniature, and some had burned ...
A: Greetings Vicki I can assure you that there is not much of difference between 2.4 and 2.5 when ...
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| thing | 11/27/2009 | Apurv |
Q: when we look at a picture on a computer, it may be clear, but if we enlarge the picture, the ...
A: A picture and sound can't be compared. A picture on a computer is a file containing picture ...
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| Electronics | 11/22/2009 | Apurv |
Q: I am currently a high school student enrolled in a Physics class. We're studying Electric Circuits ...
A: Diode is a directional device. Under ideal condition, it acts as a closed circuit in one direction ...
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| "Intelligence" of the Microprocessor | 10/15/2009 | Apurv |
Q: I am just learning about the 8085 microprocessor now. There is a program language, which the ...
A: Microprocessor contains micro-codes that issue signals for reading and writing operation ... e.g. ...
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| Electronic Circuits | 9/25/2009 | Apurv |
Q: i need some usefull informations about the internal design (constructions) of Nand gate & Nor gate ...
A: applications of Flip-Flops ... http://www.eelab.usyd.edu.au/digital_tutorial/part2/flip-flop05.html ...
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| video content | 9/15/2009 | Apurv |
Q: I need to upload a piece of original video as part of a complicated circuit but can you inform me as ...
A: Whats the source of the video ? Is it a video file, like a mp4 format file ? Whats the display your ...
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| Air conditionor | 9/13/2009 | Apurv |
Q: I believe and have also heard several places recommend that to achieve best energy and cost ...
A: I think your engineer friend is more correct. It is better to turn-off our air conditioner when you ...
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| Serial Communication Between AVR | 9/9/2009 | Apurv |
Q: I want to transfer data between 2 AVR microcontrollers and I have just 3 pins to do this. I think I ...
A: u can use UART or USART. You need only three pins of serial communication. One for transmitting the ...
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| electrical signals | 9/8/2009 | Apurv |
Q: Wasn't too sure of the category for this.My question is: Is it possible to send a radio signal or ...
A: How can you expect a device to function without power ? Any device/circuit will require power to ...
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| Electrical Frequency. | 8/25/2009 | Apurv |
Q: I want a device that will impart an electrical frequency to a conductive object. It must be capable ...
A: http://www.tek.com/products/signal_sources/ ...
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| Beginner electronics | 8/21/2009 | Apurv |
Q: i'm a secondary school pupil, just beginning my A-levels (physics, maths, english and art), and I ...
A: If you are interested towards robotics, you need to have knowledge of digital electronics. ...
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| Medical electronics | 8/19/2009 | Apurv |
Q: I am a mechanical engineering graduate. I want to learn the design and manufacturing of medical ...
A: Rather than hiring any professional, you contact some company dealing in this field to design the ...
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| Electronics and cable thickness. | 4/1/2009 | Polygon |
Q: How many amps or milliamps can one of the wire cores inside computer cat 5 networking cable carry ...
A: If you go to any shop which sells electrical/electronics goods or any shop of electrical cables, you ...
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| Electronics and cable thickness. | 4/1/2009 | Polygon |
Q: How many amps or milliamps can one of the wire cores inside computer cat 5 networking cable carry ...
A: So, basically you are going to separate the 4 pairs of wires in a standard cat5 patch cable, and use ...
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| re-chargeable batteries | 3/31/2009 | Polygon |
Q: Polygon, I don't know if this question is within your expertise, but I'm wondering if I should keep ...
A: There are two types of rechargeable batteries in general: 1)Ni-Cd / NiMH batteries : Old fashioned ...
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| generating electricity | 3/30/2009 | Polygon |
Q: We have a special flashlight for science class that includes a magnet that is shaken through a wire ...
A: The principle of torch is as follows: When the magnet moves through a metal wire coil, it induces ...
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| Experiment investigation | 3/29/2009 | Polygon |
Q: How to Design a laboratory experiment to investigate how the current which passes between two ...
A: From your list of apparatus, i could understand following ( pl correct me if i am wrong) : 1. You ...
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| Solar powered science fair project | 3/29/2009 | Polygon |
Q: In a fifth grade science fair project, what is a good way to demonstrate solar power energy usage in ...
A: 1)One idea is that you can light up the doll house with solar powered LEDs ( Light Emitting Diodes) ...
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