You are here:
- Home
- Science
- Electronics
- Electronics
Electronics/Questions
| Subject | Date Asked | Expert |
| Capacitors | 2/9/2012 | ZZ |
| Q: Why do capacitors not conduct dc current? A: A capacitor is merely two metal plates separated by a small distance, sometimes with an insulator in ... | ||
| core saturation in impedance bonds | 2/8/2012 | ZZ |
| Q: An impedance bond consist of laminated iron core about which, but insulated from are wound a few ... A: See: http://en.wikipedia.org/wiki/Magnetic_field http://en.wikipedia.org/wiki/Magnetic_reluctance ... | ||
| magnetic motors | 2/7/2012 | ZZ |
| Q: What's the deal with magnetic motors for home power use? Do they work? What about buying a kit ... A: This is in the field of witchcraft. Most of the ones I have seen are pure hype and scam. They have ... | ||
| core saturation in impedance bonds | 2/6/2012 | ZZ |
| Q: An impedance bond consist of laminated iron core about which, but insulated from are wound a few ... A: First you must recognize that the material used in the laminated core makes a whopping difference as ... | ||
| Converting pyhsical measurement to digital | 2/5/2012 | ZZ |
| Q: Can you please tell me what sort of sensing technology can be used to digitize the glass tube ... A: Are you thinking of a flowrate tube which has a gas or liquid passing through the glass tube? ... | ||
| electronic ballast | 2/5/2012 | ZZ |
| Q: Could you please point me to some Electronic ballast for use with 9W straight tube G23 base bulb ? I ... A: Here: ... | ||
| about ballast for tube lamp | 1/28/2012 | ZZ |
| Q: I have a desk lamp which uses 2 9w lamp tube. There are 2 9W ballasts which power these lamps. ... A: Sorry for the delay; been out of town. There are many kinds of lamps and ballasts. It has been my ... | ||
| Multimeter question | 1/27/2012 | ZZ |
| Q: On the other day I was playing with my multimeter. The multimeter was set to read the current and it ... A: It makes sense to me! If when switching OFF the circuit went open it could cause damage to a ... | ||
| alternative driver for a generator. | 1/26/2012 | ZZ |
| Q: i have a 10 kva generator, i was just wondering if it's possible to drive my generator by an ... A: But, I am still wondering why you want to use a transformer. Why not feed directly to the motor? ... | ||
| Burnt Resistor | 1/26/2012 | ZZ |
| Q: I'm trying to repair a small lamp that has a burnt resistor. Unfortunately, the color codes all ... A: Usually the specifications for the lamp/bulb are found on one of the web sites. ... | ||
| alternative driver for a generator. | 1/26/2012 | ZZ |
| Q: i have a 10 kva generator, i was just wondering if it's possible to drive my generator by an ... A: If you want to drive a 10 kva (kw) generator with a motor and you intend to drive it to full output ... | ||
| electronic or sonic pulse | 1/21/2012 | ZZ |
| Q: is it possible to send either an electrical or a sonic pulse into the earth to a depth of 1 metre ... A: The answer is probably yes, but it would depend heavily on the exact type of equipment you are ... | ||
| Fold-up circuit | 1/16/2012 | ZZ |
| Q: What is a fold-up circuit? Thanks in advance, Leonardo ANSWER: Sorry, I have not heard that term ... A: Sorry, I have never heard of this term used as a generic description. Perhaps you are referring to ... | ||
| Fold-up circuit | 1/15/2012 | ZZ |
| Q: What is a fold-up circuit? Thanks in advance, Leonardo A: Sorry, I have not heard that term before. Could you explain the context of where you heard of it? ... | ||
| Circuit Theory | 1/15/2012 | ZZ |
| Q: By using a series of source transformation, find the simplest circuit consist of one current source ... A: Once you have determined the equivalent resistance of the load on the right side of a|b then the ... | ||
| Circuit Theory | 1/14/2012 | ZZ |
| Q: By using a series of source transformation, find the simplest circuit consist of one current source ... A: I will give you some suggestions so you can solve it easier on your own. See the revised drawing I ... | ||
| Fingerprint scanner | 1/11/2012 | ZZ |
| Q: Please let me know how to make a simple fingerprint scanner prototype. The prototype should be ... A: I really don't know what kind of a scanner you are hoping for. For criminal works it would be a ... | ||
| Magnetism Water | 1/4/2012 | ZZ |
| Q: I am in Grade 7, and I am doing a science fair project on magnetized water. So I have some couple of ... A: Congratulations on your interest in science and your project idea. However, I have bad news for ... | ||
| car charger outputs | 1/4/2012 | ZZ |
| Q: ZZ, I want to usb charge my cellphone (while also running a dashboard camera and dedicated gps) from ... A: Looks good to me. I don't see any reason for being cautious. Happy New Year! PS: The independent ... | ||
| car charger outputs | 1/4/2012 | ZZ |
| Q: ZZ, I want to usb charge my cellphone (while also running a dashboard camera and dedicated gps) from ... A: The "output" of these USB chargers you refer to is the current capability. The phone will receive ... | ||
| electricity from rotational motion | 1/2/2012 | ZZ |
| Q: How does a rotational motion produce electricity? please explain in detail. In order to light three ... A: You must explain about the "rotary motion". Are you talking about rotating the shaft of a generator ... | ||
| Solar Cycle | 12/22/2011 | ZZ |
| Q: i had made a solar cycle how do i increase its speed, how do i control its speed, where do i get ... A: Speed: Change gear ratio. Control speed: Change gear ratio. Also, change current in field coil ... | ||
| Solar Cycle | 12/21/2011 | ZZ |
| Q: i had made a solar cycle how do i increase its speed, how do i control its speed, where do i get ... A: Is this what you are talking about? http://www.youtube.com/watch?v=N22KRIMam6E Let me know which ... | ||
| electricity from rotational motion | 12/20/2011 | ZZ |
| Q: How does a rotational motion produce electricity? please explain in detail. In order to light three ... A: Are you asking about how electricity is generated from mechanical rotation in an magnetic field such ... | ||
| Golf cart batteries | 12/19/2011 | ZZ |
| Q: I have 6 - 6 volt batteries, in series, 36 volts.. They are new batteries, but I am wanting to ... A: It is not impossible but not recommended to put batteries in parallel. This is because unless the ... | ||
| current measurement | 12/16/2011 | ZZ |
| Q: my problem is that I am trying to measure (in voltage, obviously) a current from a source of about ... A: Well, not necessarily. There must be a ground somewhere in that circuit. A voltmeter instrument or ... | ||
| current measurement | 12/16/2011 | ZZ |
| Q: my problem is that I am trying to measure (in voltage, obviously) a current from a source of about ... A: Don't know about the "fast" question you asked because taking current measurements at that speed is ... | ||
| semiconductor | 12/14/2011 | ZZ |
| Q: if 1 part per million impurity is added to silicon.how many charge particl will produced? A: See slide 4 and others of this slide presentation: ... | ||
| universal AC adapter setting | 12/11/2011 | ZZ |
| Q: I have a music player that normally runs on two AA batteries, or a 5V AC adapter with 500mA, and I ... A: It should be okey. Start with the 4.5v setting and see how it goes. If it sounds okey and seems to ... | ||
| Circuit Theory | 12/5/2011 | ZZ |
| Q: Hey, I do not understand how to get the i(inifnity) in this solution manual. Please help! Thank you A: i infinity is when the voltages are settled down to steady state conditions after long time and all ... | ||
| Verilog w/ Xilinx Spartan 3 | 12/2/2011 | ZZ |
| Q: How do you design a simple arithmetic unit using Verilog and Xilinx Spartan 3 development board to ... A: Don't know much about this but look here: ... | ||
| Sinusoidal waveform | 11/14/2011 | ZZ |
| Q: In a series R,L,C circuit the instantaneous voltage and the current are v(t)=20 sin(100t-60°) and ... A: Looks like a homework problem. We don't do homework but give you encouragement and suggestions on ... | ||
| Cell Polarization | 11/9/2011 | ZZ |
| Q: True or False The polarization of a cell refers to the distinction between the negative and positive ... A: Yes, in the most strict application of a battery the polarization yields the electromotive force to ... | ||
| Cell Polarization | 11/8/2011 | ZZ |
| Q: True or False The polarization of a cell refers to the distinction between the negative and positive ... A: Since this is an Q&A on electronics I must assume you are asking about electronic or battery based ... | ||
| Variable rate on a rotating platform | 11/5/2011 | ZZ |
| Q: I have a rotating display platform ... A: I could not find technical information on the unit you referenced. However, autoart makes many ... | ||
| Circuit Theory | 10/31/2011 | ZZ |
| Q: Hey, whats wrong with my equation ??Is there any supernode formed in this question ? Thanks A: I am going to let you answer this question by yourself. Read the supernode section in this page: ... | ||
| magnetism? | 10/30/2011 | ZZ |
| Q: I have been storing CDRs on the floor and I discovered some audio defects which I don't believe were ... A: I don't think so. The magnetic and electric fields from those distances would not be sufficient ... | ||
| Circuit Theory | 10/30/2011 | ZZ |
| Q: Hey, how to find the V(Th) of this circuit?? Thanks ... A: I am sorry, I did not check your equations exactly as the copy was too weak for me to clearly read ... | ||
| short circuit resistance | 10/30/2011 | ZZ |
| Q: This is a very simple question, but I can't find any answers in books or the internet.in the ... A: Don't confuse theory with practice. In theory, zero resistance, which represents a dead short, ... | ||
| Indicator Light for 12v Charger | 10/30/2011 | ZZ |
| Q: I have a boat that stays in the water in Mobile, AL. I live in MS so I have someone I know in the ... A: Putting the LED in the right polarity is enough. When current passes through the LED lamp in the ... | ||
ZZ
Top Expert on this page
Expertise
Electronics questions about AC, DC and digital theory.
Experience
Graduate electrical engineer with over 40 years in electronic design, manufacturing, project organization and patent review. Experience in fields of industrial and consumer electronics (audio, video, acoustics, etc.)
Organizations
IEEE (Institute of Electrical and Electronics Engineers); Senior Life member
AES (Audio Engineering Society), Fellow Life member
Education/Credentials
BSEE University of North Dakota
©2012 About.com, a part of The New York Times Company. All rights reserved.