| Subject | Date Asked | Expert |
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| Electromagnet | 5/5/2004 | Dave Nyce |
Q: I am helping my 6 year old son build an electromagnet. Does it matter what type of wire I use ? ...
A: I've never heard of cpooer wire. (Just kidding, I guess you meant copper.) Yes, it should be copper ...
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| waveguides | 5/2/2004 | cleggsan |
Q: I want to be sure I understand a few things about waveguides. The distance between two successive ...
A: http://www.epanorama.net/links/repair.html#vcr See the first few pages of the above web site. It ...
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| Transfer stationarypower to rotary power | 4/29/2004 | Dave Nyce |
Q: I am in process of making a extionsion chord reel for my outside work. My question is, how do i hook ...
A: This is definitely not easy to do on your own, safely. It requires what are called slip rings. They ...
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| specifications of a generator | 4/21/2004 | cleggsan |
Q: how does one figure how to estimate the size of a electrical generator for a home or for that matter ...
A: It is not a straight forward matter; reason is because the appliances and various other loads placed ...
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| electric | 4/15/2004 | cleggsan |
Q: ------------------------- Followup To The experiment is a bowl of salted water with a springlike ...
A: Okey. Probably insufficient current; try putting two batteries in parrallel; that will double the ...
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| electric | 4/14/2004 | cleggsan |
Q: My daughter and I are trying to do a springing spring project.It is a simple circuit but it doesn't ...
A: Peter, Could you tell me more about what project you are doing. There are some that use a bi-metal ...
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| GFCI CIRCUIT BREAKER | 4/13/2004 | Dave Nyce |
Q: ------------------------- Followup To DAVE THANK YOU FOR YOUR RESPONE I WOULD LIKE TO TELL YOU MORE ...
A: Even if there is nothing plugged in, something is still getting wet somewhere (like the wire or ...
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| GFCI CIRCUIT BREAKER | 4/13/2004 | Dave Nyce |
Q: BREAKER KEEPS TRIPING, AFTER ABOUT ONE HOURS TIME.EVEN WITH NOTHING PLUG IN MY 15 AMP 14/2 BREAKER ...
A: The GFI will trip if there is a current flowing in the ground line. The cause depends on what is on ...
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| transmission line stub | 4/12/2004 | cleggsan |
Q: I am an engineering student taking courses on line with no class room lectures or help, all my ...
A: http://users.telenet.be/educypedia/electronics/javatransmissinlines.htm The above is a list of ...
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| Computer Disk Magnetics | 4/8/2004 | Dave Nyce |
Q: That does help, thanks! But why does it also take away the ability to reformat the disk? Thanks! ...
A: After being strongly magnetized by a permanent magnet, the magnetic grains are oriented all one way ...
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| Computer Disk Magnetics | 4/8/2004 | Dave Nyce |
Q: Why can't the sectors or information on a disk be reorganized after a strong magnetic field affects ...
A: The information is encoded onto a magnetic media by alternately magnetizing the magnetic particles ...
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| microcontroller | 4/2/2004 | cleggsan |
Q: I am an amateur electronics enthusiast. I am looking for a micro-controller that I can program ...
A: How about this: http://www.mnsi.net/~boucher/programmer.htm or this: ...
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| transmission lines | 4/2/2004 | cleggsan |
Q: -I could not get the site that you suggested to open, is there another site to look at?I am having a ...
A: I had no trouble downloading the URL below. home3.netcarrier.com/~chan/EM/PROGRAMS/STUBMATCH/ ...
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| transmission lines | 3/31/2004 | cleggsan |
Q: I am having a lot of trouble understanding characteristic impedance. My question is if the ...
A: Yes. Think of the characteristic impedance as a space vector in the form of R +jXl or R - jXc. The ...
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| microwave frequencies | 3/23/2004 | cleggsan |
Q: How would a low frequency coil look like electrically at microwave frequencies? Would it look like a ...
A: Well, and ideal inductor looks like a pure inductor at all frequencies and the impedance goes up ...
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| current shunts | 3/23/2004 | cleggsan |
Q: i need the theory of operation on current shunts or whatever you can provide would be of great help!
A: I presume you have already searched on google.com for shunt theory and found there are many entries ...
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| Do you know anything about... | 3/22/2004 | cleggsan |
Q: Do you know anything about making Electomagnets? Can you tell me how to increase the magnetic ...
A: The shape of the pole piece, the current through the coil and the geometry of the surrounding ...
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| waves | 3/20/2004 | cleggsan |
Q: In an electromagnetic wave traveling in free space do the electric and the magnetic fields travel at ...
A: At right angles. If the current in an antenna is instantly dropped to zero it would generate an ...
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| modulated waves | 3/10/2004 | cleggsan |
Q: Does the phase modulation process result in an amplitude modulated wave? Is the frequency deviation ...
A: Yes, all frequency, phase or time modulation of frequency usually creates some amplitude modulation ...
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| Science fair trouble | 3/8/2004 | cleggsan |
Q: I am doing an experiment on a crystal radio. I want to know what a grounder is and which are the ...
A: Joanne, Crystal radios were used prior to vacuum tube and transistor amplification. The basic idea ...
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| receivers | 3/8/2004 | cleggsan |
Q: What is fringe howl and how is it produced in a receiver.
A: Fringe howl, to my understanding is when the tuned rc circuit is too high q and as you approach ...
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| amp circuits | 2/22/2004 | cleggsan |
Q: How would you determine the max. peak to peak output voltage? There is a circuit diagram being ...
A: Very simple. This is a complimentary symmetry push-pull class ab amplifier. You did not give me ...
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| history of electrical meters | 2/21/2004 | cleggsan |
Q: We are looking on the history of the voltmeter, ammeter, & ohmmeter. Where on the internet can we ...
A: (PS: Please excuse the delay. The allexperts website was down for a few hours, but it is back now.) ...
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| photoconductive cell circuit | 2/17/2004 | cleggsan |
Q: My son (12) is doing a science fair project showing the effect of different colored balls on a ...
A: Jake, The role of the potentiometer is to calibrate the light cell as is described in the paper: ...
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| Elementary School Electricity | 2/15/2004 | cleggsan |
Q: My girls are 3rd graders and getting ready for their first science fair. They have chosen static ...
A: http://store.doverpublications.com/0486220303.html Let me recommend the above book; Electricity ...
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| radio signals | 2/13/2004 | cleggsan |
Q: Is phase modulation an indirest form of frequency modulation and explain.
A: Phase modulation is when the phase of the carrier is modulated - as opposed to the frequency. Yes, ...
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| science fair project | 2/8/2004 | cleggsan |
Q: I would like to build the walkie talkies from scratch. How do I get started? In the science fair at ...
A: Big job. It is not an easy project because the high frequency components that are used in making ...
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| science fair project | 2/8/2004 | cleggsan |
Q: I'm in the seventh grade and have choosen to build walkie talkies for my science project. Next I ...
A: Good project. Are you building the radios from scratch or from a kit or from a lab project? Do you ...
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| 18v battery charger | 2/5/2004 | cleggsan |
Q: i have a couple 18v cordless dewalt tools. the battery charger was stolen on the job site. a ...
A: Well, you could, but you would need to know many things before choosing the right transformer. ...
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| modulators | 2/4/2004 | cleggsan |
Q: In a balanced ring modulator,how is the carrier suppression accomplished and is a Phase modulator a ...
A: There are so many kinds of modulation now days it is almost impossible to keep up with them unless ...
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| high frequency | 1/28/2004 | cleggsan |
Q: What commercial parts are available to build a 12000 watt, 9600 Hz power source for shop use?
A: Just wondering why you need 9600Hz. That is pretty high for a power source. Design is quite ...
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| sine wave | 1/20/2004 | Dave Nyce |
Q: Why would a 5kHz square wave need a greater bandwidth than a 2 kHz sine wave?
A: Theoretically, a square wave has near infinite bandwidth, but to get a reasonable representation you ...
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| questions about your job | 1/12/2004 | cleggsan |
Q: What made you choose computer engineering? What is your job as a computer engineer? What's the ...
A: What made you choose computer engineering? I HAVE BEEN INTERESTED IN ELECTRONICS, MUSIC AND ...
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| SCR | 1/9/2004 | Dave Nyce |
Q: How would you determine the value of VGS that will turn a SCR on if the gate voltage is 0.6V and the ...
A: If you are driving the gate from a 5 volt source, then 4.4V are available to develop the 10mA, after ...
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| oscillation | 1/4/2004 | Dave Nyce |
Q: What is required of a circuit to have oscillation? I know feedback is involved, but is it positive ...
A: Positive feedback is required to cause oscillation in an amplifier. It can be a small amount of ...
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| Electrical interference | 12/24/2003 | cleggsan |
Q: I received an electrical vibrating chair pad for Christmas. The problem is when it's on; it ...
A: Try moving it into other positions or orientations, but appliances of this kind that put out rf ...
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| Transformer | 12/21/2003 | cleggsan |
Q: Sir, I want to know that why the power transformers are rated in KVA insted of KW?Kindly explain me ...
A: The answer is a technical one. ONE: KW or kilowatts has to do with real power, that is heating ...
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| LED circuits | 12/12/2003 | Dave Nyce |
Q: I am having a lot of trouble in this type of problem and any help will be appreciated. The dark ...
A: Assume your 1700 lumen bulb is contained at the center of a spherical surface, and all of the light ...
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| power supplies | 12/4/2003 | Dave Nyce |
Q: Why would a low resistance filter choke be prefered over a high resistance filter choke?
A: A lower resistance filter choke would use a larger diameter wire, and therefore may be physically ...
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| Electricity | 12/4/2003 | cleggsan |
Q: What is the defination for electric force, electric discharge and static charge? Please make the ...
A: Electric Force: Usually measured in voltage units, this is the potential to which the electron have ...
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