| Subject | Date Asked |
|
| power conversion | 9/17/2007 |
Q: I replaced an old boiler with a microvolt system with a new boiler that requires a 24Vac supply. If ...
A: Reid, I feel that it's best to back up the 120AC. Why? For one of the reasons stated, it's easier ...
|
| Conroller choose | 8/14/2007 |
Q: I wanna ask about the factors that affect the choosing of the suitable controller, on what ill i ...
A: Awadelrahman, There are a number of basic considerations to take into account, for instance: 1. ...
|
| LM3914 0-1V input | 8/8/2007 |
Q: Ref: http://en.allexperts.com/q/Electrical-Engineering-1356/LM3914-used-0-1V.htm I connected the ...
A: I believe that you should be using a PNP type transistor such as a 2n3906 for what you are trying to ...
|
| DC to AC Inverters | 8/3/2007 |
Q: I want to get an inverter to run off of the cigarette lighter of my SUV for tailgating. I would ...
A: Sam, If you are in the United States, we run of of 120 VAC. So all of the equipment is designed for ...
|
| AES carrier voltage | 7/9/2007 |
Q: I am trying to find a simple circuit or IC that I can use to get the AES digital audio stream ...
A: A long time ago, Philips had a chip that performed a similar function. I don't remember the part ...
|
| computer power supply issue | 6/29/2007 |
Q: I hope I don't bore you to death with this question!! I have a comptuer that is using a micro ATX ...
A: Brad, The power rating on a power supply indicated the maximum amount of power it can provide. ...
|
| Adapter voltage question | 6/12/2007 |
Q: I'm looking for some advice about power adapters. I have an old sequencer that I acquired without ...
A: The 10 volt supply that you describe seems rather odd. This is because I'm used to seeing supply ...
|
| Electromagnet Design | 5/25/2007 |
Q: I'm wanting to build a round electromagnet that is 3" in total diameter (coil included). I want to ...
A: Brady, although this seems like a simple problem on the outset, it could get complicated. I can ...
|
| generator | 5/1/2007 |
Q: I used insulated copper wire in a generator but recently read about magnet wire. Is magnet wire more ...
A: Jan, When we speak about magnet wire, we are speaking usually of solid copper wire with a very thin ...
|
| 12 v Transformer | 4/29/2007 |
Q: I am installing 12v garden lighting,I have a 12v transformer with 4 50vA outlets,the light fittings ...
A: Al, I'm not sure how to do this because I am not familiar with the construction of the low voltages ...
|
| test instument | 4/25/2007 |
Q: What type of test instrument relies upon a known bit pattern to test for proper operation of a ...
A: Robert, I believe that it's actually called a "bit pattern tester". These types of devices are used ...
|
| Photoelectric Eyes | 4/23/2007 |
Q: Iannuzzi, In my grade 10 engineering class at school, we have to design a automated can crusher, ...
A: Josh, You can try a couple of things. You want to look up the terms "photodiode detector" and ...
|
| Time Resolution | 4/17/2007 |
Q: Following my previous question about time resolution; I'll be more specific here: we have a system ...
A: Shiva, If I'm interpreting your question properly, each data set has a time stamp associated with ...
|
| Electrical Advice | 4/15/2007 |
Q: if i want to install a lamp of 300w-12 volt...under water lamp...at a distance of between 30-50 ...
A: Raafat, You need to find the resistance per meter of the particular cable you are using. Then it is ...
|
| 4-20mA Loop | 3/31/2007 |
Q: Goodday.. For a 4-20mA loop we have 4 major components those are the sensor/transducer, ...
A: It seems to me that there is some confusion abut the 4ma-20ma current loop. The current loop is a ...
|
| Looking to get into the field | 3/19/2007 |
Q: Hey, My name is John. I'm a high school student looking to get into the field of Electrical ...
A: John, Questions like this are very difficult to answer especially when a young person is involved in ...
|
| toroidal transformer | 3/10/2007 |
Q: I am designing a current transformer, toroidal which will be able to pick up the current inductively ...
A: This is a complicated problem and it's going to take some experimentation. If your current(Ip)is ...
|
| electric baseboard heating | 2/19/2007 |
Q: I have an electric baseboard heater built in to the wall (that needs to be replaced) that is 120 ...
A: Al, I believe that the best approach would be to contact an electrician. You really can't expect a ...
|
| Bicycle Generator | 1/27/2007 |
Q: I recently put together a bicycle generator. I used a 12v fan motor for my generator. I can power a ...
A: Bryan, Interesting project. You should get a book on basic electronics and look up "diodes". Your ...
|
| Electric tools | 1/24/2007 |
Q: Is there a tool available for measuring amps used by a lamp or appliance? What is it called? I ...
A: Ted, You can probably pick something up at Radio Shack. Actually, the device is called a Clamp-on ...
|
| Quality Factor (Q) of inductor and capacitor | 1/16/2007 |
Q: Iannuzzi, In many documents, when saying about inductor or capacitor, people usually mention quality ...
A: Thanh, Q, as you mentioned, is a measure of the quality factor of an inductor and/or capacitor. ...
|
| Reverse current | 1/11/2007 |
Q: Ho John, Yes, is a key a switch. I am using a power supply with 35VCC feeding the inductor (one ...
A: Maria, If I understand you correctly, the circuit is modeled as a 35 volt DC power supply with the ...
|
| Electronic pickups | 1/7/2007 |
Q: I was trying to build several rectifiers as a project for my guitar but i was getting confused as to ...
A: To briefly summarize, the pickup senses the vibration of the string and an AC frequency is produced. ...
|
| integral calculus | 1/5/2007 |
Q: how is integral calculus used in electrical engineering?
A: Integral calculus as well as differential calculus is used in electrical engineering mostly for ...
|
| Schmitt triggers | 11/5/2006 |
Q: I tried your suggestion and nothing much changes. I did not have those exact resistor values but ...
A: Ken, I don't understand why that does not work. Does it work at lower frequencies? You will have ...
|
| Schmitt triggers | 11/4/2006 |
Q: I am attempting to convert the sine wave output of a 10MHz oscillator into a square wave. Various ...
A: Ken, Try this. Use the top circuit on web page that you gave me. Make the cap value 0.01uf, the ...
|
| audio transformer | 11/1/2006 |
Q: Can you tell me how to calculate the output voltage from an audio transformer? The audio ...
A: Darsh, I'm not quite sure how to answer your question. A transformer is an AC device whose basis of ...
|
| RFID system | 10/31/2006 |
Q: I am trying to help my son build a simple RFID system. Basically the RFID tag will be mounted on a ...
A: Jen, I don't think I'm going to be much help on this one. I looked at the kit that you referenced ...
|
| remote control application | 10/19/2006 |
Q: John, I am a plastic injection part and mold designer,with zero remote control experience. The ...
A: Tom, You may be able to get (to start with) a "blue tooth" reciever/transmitter starter kit from ...
|
| Fourier vs Laplace | 10/18/2006 |
Q: What I would like to confirm is: When analyzing a circuit or doing signal analysis, the Laplace ...
A: Nil, I had to ask one of my old college professors at Drexel University this one. Here is his ...
|
| Electromagnets | 10/17/2006 |
Q: What are electromagnets used for?
A: An electromagnet is a device whos magnetic field can be turned on/off. Current flowing through the ...
|
| Too much current drawn, voltage drop. | 10/14/2006 |
Q: i'm working on a project where my servo motor (HS 422) has to respond to instructions from a DAQ ...
A: Steve, I don't recommend that you limit the current to the motor. The torque produced by the motor ...
|
| real and ideal circuits | 10/5/2006 |
Q: i have studied some electronic circuits such as battery chargers in some electronic books, but when ...
A: This is a difficult question to answer. You must remember that when a textbook is involved, it ...
|
| parallel led resistor selection | 9/30/2006 |
Q: I want to use LED's to create an accent under a handrail on a stairs. Each LED will be about 1 foot ...
A: Doug, If you connect all of the LEDs in series, since there are 12 of them, that might just do it ...
|
| office equipment conversion from UK to US | 9/28/2006 |
Q: I am moving to the States after many years in the UK. I have several items of office equipment that ...
A: Christine, I apologize for the delay in my response. You may be able to get a converter at Radio ...
|
| Electric Current | 9/26/2006 |
Q: There is always a reaction to every action. I have been thinking about how electic current flows. ...
A: Roger, When you turn off a motor driven appliance the motor becomes in effect, a generator. When ...
|
| Signal To Notify Arrival | 9/26/2006 |
Q: Greetings Sir, I live in the woods. My postbox is about 1/2 mile away. I want to build or obtain a ...
A: Wane, There are a couple of things to consider. How are you going to power the device. Battery? ...
|
| Ni-cad charger | 9/19/2006 |
Q: I have a portable marine radio that is powered by 8 1.2v ni-cad batteries. I lost the charging ...
A: I'm a little weak on battery chargers but I believe that if you were to get a charger that has ...
|
| Laplace Transforms | 9/15/2006 |
Q: John, Thank you for your candid response and your patience. The problem may be that I don’t know ...
A: Danny, I'm pretty swamped with work right now. You will have to be patient for my reply. By the ...
|
| Nominal voltage | 9/10/2006 |
Q: I faced the term "Nom. voltage" in more than one electrical instrument manual, in some places they ...
A: Nominal voltage is the "normal" voltage that one can expect to measure at any given test point. In ...
|
| Laplace Transforms | 9/10/2006 |
Q: When using complex roots, I seem to remember having been informed that the sign of the imaginary ...
A: Danny, without going through a complete review of complex variables, the anwer to your question is ...
|
| Reducing voltage | 8/17/2006 |
Q: Im learning trying to set a baby swing to run off the wall socket, I know almost nothing about ...
A: Lywelyn, Normally, I would NOT address a question like this, but I feel compelled to say something. ...
|
| Current to volt convertor | 8/8/2006 |
Q: actually i have an idea of a resistor of 250 ohms, this will lead to have 5 volts when the current ...
A: First, draw the voltage vs. current graph using the two points (0v, 4mA) and (5v, 20mA). Plot the ...
|
| Problem of sensor | 8/3/2006 |
Q: I explain this problem as following: I have a probe which measures water level in tank. The probe ...
A: Phong, If the probe has an RS232 connection this should be simple. If not, you need something to ...
|
| Calculating the duration a UPS will last. | 7/23/2006 |
Q: I plan to use a UPS (designed for computer) for the transformer of my alarm system at my vacation ...
A: Paul, I don't know in detail how to do this but I may be able to get you to a starting point. The VA ...
|
| dictionary | 7/20/2006 |
Q: I want to design a digital dictionary,I have a computer science background but know nothing of ...
A: Meera, The project that you speak of is very large especially since you have very little, if none, ...
|
| data transfering | 7/19/2006 |
Q: I want the answer of my following question. I have a Dos operating based industrial dedicated ...
A: If you know the name of the program you want to copy, do this: 1. Install hard drive to new system ...
|
| Career choices in electrical engineering | 6/30/2006 |
Q: My son is looking to do a degree next year and is unsure about what job he ultimatly wants to do. he ...
A: David, Questions like this are very difficult to answer especially when a young person is involved ...
|
| SMPS current limiting | 6/28/2006 |
Q: I am building a DC SMPS laboratory kit for a Uni project that needs to be able to implement about 8 ...
A: It's difficult for me to answer this question without additional information on the "floating" ...
|
| help | 6/28/2006 |
Q: I am studying electrical and computer engineering in a Greek university. My studies last 5 years, ...
A: You are asking quite a few things! I guess the first thing to ask yourself is "what am I passionate ...
|
| 7segment display | 6/26/2006 |
Q: Will want to know how to build display circuit with one 7 segment display, eight switches for 0 to 7 ...
A: Wolfe, are you sure that this is the correct part number? It sounds very old. I suggest that you ...
|
| measuring low current | 6/25/2006 |
Q: What other method I can use measuring as low as 10pA current other than IV conventer. Please give me ...
A: Mike, There are quite a few questions here. For the current measurment, you may want to go to ...
|
| Phase comparator | 6/25/2006 |
Q: I want to compare the phase of two ac signals i-e whether they are in phase or out of phase.The ...
A: Rizwan, The output that you are describing is that of an exclusive-OR function. If you could ...
|
| electrical engineering algebra | 6/12/2006 |
Q: My name is Kevin. I asked you a question before, but I think I gave you the wrong e-mail address, ...
A: Kevin, Below is the previous answer. Hi Kevin, Polynomial equations occur frequently when ...
|
| transistor with relay load | 5/30/2006 |
Q: Iannuzzi, I am not a electronic student but I like it very much. So I learn it by myself. And I have ...
A: Thanh, When you energize an inductor, in your case a relay coil, current flows through the inductor ...
|
| degital desply | 5/19/2006 |
Q: I have 0Vdc to 5Vdc analog signal.I want to see it on 7-segment desply in such away that when input ...
A: Rizwan, First you need a Analog-to-Digital converter to convert the 0-5v analog to a digital signal. ...
|
| using infrared beam to monitor fish movement... | 5/11/2006 |
Q: my name is Andy, an undergrad at UVA. I am doing research on circadian rhythms of puffer fish and ...
A: Andy, I don't see transmission problem if the water and glass are clean. You will have to try it. ...
|
| L. E. D. circuit board design | 5/1/2006 |
Q: How would I find an engineer to design an l.e.d. circuit board to use as a test light for a 5 amp ...
A: My company,"Core Technology Group", is a test instrumentation and design consulting firm. We have ...
|
| transformers | 4/30/2006 |
Q: I am involved in a project that has an incoming electrical service of 480/277v Y 3phase service. I ...
A: Peter, I must apologize but I'm not really qualified to answer questions that pertain to voltages ...
|
| Analog Signal Processing | 4/23/2006 |
Q: and thanks a lot for offering to offer your expertise to people like me. Currently, I'm using a ...
A: Chris, I read through your message and kind of understand your issue but it's difficult to make a ...
|
| Electrical | 4/15/2006 |
Q: I live in a concrete floored condo and someone below me is using a form of electrical apparatus ...
A: James, I don't think I'm going to be much help on this one. I can't even begin to imagine what this ...
|
| UJT | 4/15/2006 |
Q: I want a tutorial/information about chracteristic curve of UJT. THANKS
A: A UJT is a unijunction transistor. There is plenty of information on the web about standard or ...
|
| Interfacing | 4/14/2006 |
Q: I have just started reading interfacing tutorial using pc parallel port.I want to do interfacing on ...
A: Rizwan, I'm not sure that I can help you with interfacing the parallel port in VB6. I can tell you ...
|
| Relays | 4/12/2006 |
Q: I'm trying to rig up something where I use a piezoelectric transducer hooked up to the coil of a ...
A: Let me just re-state your question to see if I have it straight; you want to basically energize the ...
|
| 7-segment display | 4/4/2006 |
Q: ------------------------- Sir, actually i want to display the dicimal digits(which contain ...
A: Rizwan, My understanding is that you want the decimial point to move to keep the display reading in ...
|
| 7-segment display | 4/3/2006 |
Q: I want to know how can a point be moved on 7-segment display when using 7447 decoder. For ...
A: Rizwan, I don't quite understand the question. Are you talking about the decimal point? I don't ...
|
| 1 to 1 Test Circuit | 3/24/2006 |
Q: I'm designing a production test fixture for a simple 5 wire, 1 to 1 cable assembly. My idea is to ...
A: Richie, Could you provide a few more details. If one end of the cable, call it point A, is tied to ...
|
| CMOS oscillator | 3/8/2006 |
Q: I have an LC circuit that I wired into a CMOS inverter circuit in place of where you would normally ...
A: Dave, This is only a guess but you may want to try putting a low value resistor (30-100 ohms) either ...
|
| impedance | 2/26/2006 |
Q: I am supposed to find the impedance of a circuit. And am very confused. Any information you can ...
A: Bob, Are you an engineering student? If so, you MUST ask your advisor about the solution to this ...
|
| Electrical | 2/25/2006 |
Q: Good evening. I have a Federal Signal brand rotating 120V-200 watt light. The planned use for this ...
A: Bill, does this light use AC or DC for power. That is, do you plug it into the wall? You must also ...
|
| LED circuit | 2/23/2006 |
Q: If i'm using the LM3914 chip from National Semiconductor for analog input voltage, the input is ...
A: The specification for the LM3914 indicates that a maximum voltage of +/- 35 volts can be applied to ...
|
| LDR Switch | 2/6/2006 |
Q: I have a very simple circuit question, but it's a few years since I did electronics in school, so ...
A: Chris, For this circuit to work, you must put the transistor in the Ground path of the camera. What ...
|
| Thermocouple signal conditioning | 1/23/2006 |
Q: I want signal conditioning circuit or tecnique for Thermocouple signal conditioning.The problem i ...
A: Personaly, I have limited experience with thermocouples, and that was a long time ago. Omega ...
|
| 3-way wall switches | 1/11/2006 |
Q: how do you determine the load wire and the travelor wire, when 2 separate swicthes can turn on/off ...
A: Fred, I sorry, but I am not qualified to answer questions about industrial and/or residential ...
|
| Parallel Circuit Current | 12/10/2005 |
Q: If you had a 1-megaohm resistor across a 1000V cell and 0.001A flowed through the resistor. Now, if ...
A: Simon, If the cell is a perfect voltage source, that is the voltage remains at 1KV when you connect ...
|
| IR repeater project | 12/5/2005 |
Q: The reason i asked about digital amplification is because im trying to build a home theater IR ...
A: Ben, Working from your comments, it sound workable. You need an IR reciever to recieve the signals ...
|
| Digital amplification | 12/4/2005 |
Q: my question is the following, what device or circuit would i use to amplify a digital signal?
A: Ben, Generally, a signal, digital or analog may be amplified using an OP AMP. Depending on the ...
|
| kirchoffs law | 12/1/2005 |
Q: -------------------------- | | | | | | ...
A: David, I would solve this problem using super position as follows. 1. Zero the 10 volt supply. ...
|
| CMOS inverter | 11/29/2005 |
Q: this webpage shows an example of a simple CMOS inverter (NOT gate): ...
A: Simon, The P channel Mosfet turns on when the gate voltage is negative with RESPECT to the source. ...
|
| Hi John, I have a flashlight... | 11/13/2005 |
Q: I have a flashlight that has several LEDs instead of the usual incandescent bulb. While the ...
A: Doug, I suspect that you have had an experience with the string of christmas lights. I really don't ...
|
| Emitter Resistor | 10/23/2005 |
Q: http://www.mathcad.com/Library/LibraryContent/MathML/emitampl.htm This site shows a common emitter ...
A: Simon, First, go to the circuit that you referenced and re-draw it using only Vcc, RC, ...
|
| science project | 10/22/2005 |
Q: Mr. Iannuzzi, my daughter has to do a science fair project, she chose "What material conducts ...
A: Tom, The three basic quantities in electricity are, Voltage, current and resistance. To check how ...
|
| Protection Diode | 10/15/2005 |
Q: In a simple circuit consisting of a (NPN) transistor (with a voltage divider supplying 0.6V to the ...
A: Simon, Consider the state of the circuit just prior to the transistor switching on. The emitter is ...
|
| AC breakdown | 9/30/2005 |
Q: This may be as much a physics question as an engineering question, but perhaps you have some ...
A: Jason, Your second assumption is correct. If a +/- 4kv signal is impressed across a system, the ...
|
| 115V SMPS conversion to 230V mains input | 9/18/2005 |
Q: I have a basic understanding of SMPS circuits, but not enough to answer this question, so I'm glad ...
A: James, DON'T PLAY WITH THIS. There are a number of complicated issues when dealing with switch mode ...
|
| Circuit analyis | 9/12/2005 |
Q: given a ciruit with an inverting op-amp, and initial voltage V=2v, and an open loop differential ...
A: Dan, The voltage gain of an op amp in the inverting configuration that you described is Vout= ...
|
| Inverters | 8/27/2005 |
Q: Iannuzzi, I bought a 2000 watt inverter a few months ago and I am trying to see what it will run in ...
A: Tom, I don't have much experience with power inverters but I do know about power conversion. An ...
|
| advice needed for a project | 8/15/2005 |
Q: Sir I would like to make a device that converts light (I might use a torch as a source) into sound ...
A: Farzana, What you need is a device that converts light energy into an electronic signal. The ...
|
| mystery beep | 8/4/2005 |
Q: The house I rent had a Casablance ceiling fan installed a year ago, and it's been silent and ...
A: Richard, I'm sorry. I don't have a clue. But I feel your pain. Just this morning (4:30), we were ...
|
| LASER mirror/DLP micromirror | 7/24/2005 |
Q: A laser uses a half-silvered mirror to ensure that the light leaving the laser is "in phase" or ...
A: Are you sure that the half-silvered mirror is not a splitter? As far as the DLP is concerned. I ...
|
| electrical engineering | 7/5/2005 |
Q: please can you explain to me what you meant by the word "use the math" or rather what math are you ...
A: For some reason, math and theoretical circuit modeling falls through the cracks for many EEs after ...
|
| electrical engineering | 7/1/2005 |
Q: i am an electrical engineering student with an option in electronics and telecommunication ...
A: Femi, As you know, there are a lot of specalty feilds in EE. It's great if you know exactly what ...
|
| Relays | 6/30/2005 |
Q: I am trying to get a bank of LED's to switch on when a 4.0v, 3mA signal is present. The LED's would ...
A: Dain, First make sure that the LEDs in the switching circuit are connected with the right polarity. ...
|
| Voltage Divider/Transformer rating | 6/23/2005 |
Q: Is a transformer's current rating the amount of current the transformer can deliver SAFELY? I would ...
A: General application AC transformers are usually rated using volt-amperes. This is a measure of ...
|
| weed whacker motor | 6/8/2005 |
Q: I realize you are way overqualified for my question, but desparation prompts me to ask anyway. My ...
A: Bruce, I have seen sparks from brushed motors solely by the contacts being dirty. Check that... you ...
|
| Diode | 5/31/2005 |
Q: Is diode a passive or active device?
A: Generally, resistors, capacitors, inductors, transformers and such are classified as passive ...
|
| Audio | 4/26/2005 |
Q: I have a CD player whose output is stereo AES/EBU. I want to convert it to analog sound suitable to ...
A: If the computer sound card has an AES/EBU input then there should be no problem. I don't know if ...
|
| Electronics | 4/20/2005 |
Q: I have a CD player whose output is stereo AES/EBU. I want to convert it to analog sound suitable to ...
A: This is not easy. The AES/EBU signal you are referring to is a PCM encoded data stream. It is a ...
|
| DC neg side wire colors | 4/19/2005 |
Q: I have a good one for you. I hope you can help. I am builing a control panel for an industrial ...
A: John, Your question does seem to be a bit ambiguous but I THINK I understand. It seems that you ...
|
| solar powered lightbulbs | 4/17/2005 |
Q: Hey!! I'm not sure if you know about solar powered energy, but I have a question. For my science ...
A: Skye, It may be best to start with an low voltage system like an LED or a 5 volt lamp. Actually, ...
|
| Reduce AC power | 4/15/2005 |
Q: nice to meet you. Here myI would like to reduce High AC power to Low DC power, the normal method is ...
A: Sena, This is not a comfortable question for me to answer and beyond any discussion here. There are ...
|
| Battery Replacement? | 4/12/2005 |
Q: I am trying to replace a battery in what is essentially an uninterruptable power supply. The battery ...
A: George, You can use the 6v 4.5amp battery. The current rating just means that the battery can ...
|
| understanding transistors | 4/12/2005 |
Q: A Biploar transistor is current operated, so current to the base matters not voltage? And a small ...
A: Simon, I'm finding it difficult to answer your question(s)mainly because of the broad scope of the ...
|
| Bipolar-Junction transistor/ CMOS sensor | 4/11/2005 |
Q: I have read that the voltage on the base of a bipolar transistor cannot rise above 0.6V. How is this ...
A: The voltage that you are referencing is the base- emitter voltage. The base-emitter and the ...
|
| Oscillators (I skipped the actual question before) | 4/11/2005 |
Q: I am a student of electrica engineering. We have been asked in an Electronics Laboratry Class to ...
A: Elad, What you have here (as you have discovered) is an oscillator circuit. There are a number of ...
|
| Voltage Query | 4/6/2005 |
Q: Your profile reads that your over qualified for my query but hopefully you'll have a look anyway. I ...
A: Robert, Each AA battery provides 1.5 volts. They are probably connected in seriers to give you ...
|
| measuring body's response to ambient emfs | 3/24/2005 |
Q: I am beginning to learn electronics and microcontrollers. I am interested in building a portable ...
A: Stephanie, Your idea is interesting but VERY complicated. There are may challanges to overcome in ...
|
| Static Electricity | 1/31/2005 |
Q: I am in 7th grade and am trying to do a project with static electricity. I wish to know a few safety ...
A: Garrett, If you are going to produce the static electricity by a common method such as rubbing ...
|
| Electromagnet | 1/25/2005 |
Q: I want to make an Electromagnet for my Science Project but I don't have a question that I can answer ...
A: Michael, Electromagnets are used in a number of items such as relays, motors. They are also used ...
|
| SMPS | 1/21/2005 |
Q: In a switched mode power supply the AC mains input (100 - 240V ) is converted to DC, then fed ...
A: Simon, The questions that you are asking can best be answered by referring to books that deal with ...
|
| Led Question | 1/16/2005 |
Q: I am working on a project that i need some leds. i need 14 red leds (1.7V, 30 mA max, 1500mcd) to ...
A: 14 LEDs are going to require a clever arrangement of batteries as well as the configuration of the ...
|
| jacobs ladder | 1/15/2005 |
Q: how do i use a jacobs ladder for a science experiment. what am i proving to the class. what is ...
A: A Jacob's ladder is a device to experiment with ionizing air molecules between two HIGH VOLTAGE ...
|
| Series circuit | 1/8/2005 |
Q: I did a practical experiment in my school. The experiment was to make a series circuit with three ...
A: I am going to assume that the bulbs you are using are incandecent types similar to those used in ...
|
| Wire Harness Documentation | 12/28/2004 |
Q: Do you know of any existing standard and where to obtain it for wire harness documentation? Thank ...
A: Richard, I don't actually KNOW of any standard but I believe that some guidance or standard must ...
|
| sine wave generator | 12/24/2004 |
Q: my sine wave generator generates sine wave. but when is connected to circuit sine wave cuts in max ...
A: It sounds to me like the sine wave is experiencing a phenomena called "Clipping." Clipping occurs ...
|
