| Subject | Date Asked | Expert |
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| LVDT | 1/16/2006 | Dave Nyce |
Q: I want a circuit for signal conditioning the LVDT.If u can help me then plz. send me a solution.I ...
A: Developing signal conditioning circuits for an LVDT is a part of my business, and involves a lot ...
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| 3-way wall switches | 1/11/2006 | John F. Iannuzzi |
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 ...
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| Summing OpAmp | 1/9/2006 | Russ Kinner |
Q: Another point on opamp operation: a question I came across asked why in an ideal opamp circuit there ...
A: I don't think I can seriously proceed with our discussion as it is a bit beyond my training. ...
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| About relays | 1/8/2006 | Dave Nyce |
Q: I wanted to make sure one more thing. The relays used in this circuit are all DPDT? because i think ...
A: I thought that you were asking about RL1, because those contacts are shown. I can't say for sure ...
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| electricity | 1/7/2006 | Russ Kinner |
Q: How could I measure how electrically conductive materials are? I'm trying to find the best ...
A: Measurment of conductivity is not simple for materials that are not metal. Here is one of the ...
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| About relays | 1/6/2006 | Dave Nyce |
Q: visit the following link. http://electronicsworld.tripod.com/remotecontrolsimages/2.gif this is ...
A: The relay shown is DPDT (double pole, double throw). The diode has to be added. The reason for the ...
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| Summing OpAmp | 1/4/2006 | Russ Kinner |
Q: This webpage: ...
A: You hit the nail on the head! The OP amp is by design a very high impedance device (typically over ...
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| about a project | 1/2/2006 | Dave Nyce |
Q: sir, i want to design a electronic circuit.It would be given a ac supply and the amount of current ...
A: There are several books on the subject. Also, application notes are available from the voltage ...
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| science project | 12/31/2005 | cleggsan |
Q: I am having a really hard time finding any information on a science project question I have. My ...
A: http://hyperphysics.phy-astr.gsu.edu/hbase/electric/capchg.html The above site will show the ...
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| electrical | 12/30/2005 | Russ Kinner |
Q: I just got back from Korea and I brought a stereo with me. The stereo is 220 volts, 130 watts and 60 ...
A: Fortunately, I have worked in Korea and dealt with the conversion issues. Both Korea and the US ...
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| Internal Resistance | 12/21/2005 | cleggsan |
Q: If you had a normal cell connected to a 1-Megaohm resistor, measured the current through the ...
A: You sent this question to one of my collegues. You did not like the answer? I think you are ...
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| Driving Impedance | 12/18/2005 | Dave Nyce |
Q: What is meant by the term "driving impedance"? For example, would the driving impedance of an ...
A: I would not use a term such as "driving impedance" without explaining it. I suppose that they are ...
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| Parallel Circuit Current | 12/10/2005 | John F. Iannuzzi |
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 ...
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| CRT final anode | 12/9/2005 | cleggsan |
Q: "an aluminum overcoat is deposited over the phosphor/black matrix. This has several functions: * ...
A: There is 25,000 volts on a typical tv crt. That is enough voltage to attract dust from all over the ...
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| keyless remote | 12/8/2005 | Russ Kinner |
Q: How does the electronics work when you press your automobile's keyless entry button, and how does ...
A: The unit sends several messages through a low power transmitter that it contains to a receiver in ...
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| CRT final anode | 12/7/2005 | cleggsan |
Q: Just to check: The final anode consists of the aquadag coating around the "bell" of the tube but is ...
A: Not sure I understand your question. Take a look at this slide presentation: ...
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| IR repeater project | 12/5/2005 | John F. Iannuzzi |
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 ...
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| Digital amplification | 12/4/2005 | John F. Iannuzzi |
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 ...
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| kirchoffs law | 12/1/2005 | John F. Iannuzzi |
Q: -------------------------- | | | | | | ...
A: David, I would solve this problem using super position as follows. 1. Zero the 10 volt supply. ...
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| electrical science | 11/30/2005 | Russ Kinner |
Q: what is achevied by increasing the physical area of a heat sink when used in conjuntion with a ...
A: The simple answer is that the transistor generates heat as a normal part of its functioning and must ...
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| CMOS inverter | 11/29/2005 | John F. Iannuzzi |
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. ...
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| Electromagnetic Currents | 11/20/2005 | Dave Nyce |
Q: Does electromagnetic current flow faster through a wire if it is thicker? I would think that it ...
A: It looks like you sent this question a few days ago, but I just received it a few minutes ago. I ...
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| Transistor operation | 11/20/2005 | Dave Nyce |
Q: My question is about how to think about a transistor in relation to the rest of a circuit.... I'll ...
A: It seems like you are getting a good understanding of how a transistor works, but I avoid comparing ...
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| design between tow generators | 11/17/2005 | cleggsan |
Q: der sir, kindly i'm asking if i have tow generators(1MW)and if i need the first generator working ...
A: Caterpillar, Cummins and Genarac are the big makers of switch gear for medium sized generators. I ...
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| Hi John, I have a flashlight... | 11/13/2005 | John F. Iannuzzi |
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 ...
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| voltage | 11/13/2005 | Russ Kinner |
Q: Whats the difference between voltage drop and voltage loss?
A: There is actually little difference in these terms. Voltage loss: ...
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| Earth and static electricity | 11/12/2005 | cleggsan |
Q: ) Once, I got a shock from a whiteboard... I look at it like this: when wiping the whiteboard some ...
A: You are confusing current flow and closed circuit paths with the concept of just moving charges ...
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| Earth and static electricity | 11/11/2005 | cleggsan |
Q: I believe this point to be true: IN THEORY: if you took the -ve terminal of a cell and bueried it in ...
A: ONE: Current flow, as from a circuit connected to a battery, is actual movement of current (in ...
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| Mercury switch replacement | 11/10/2005 | Dave Nyce |
Q: I'd like to know if there has been any recent development of products to replace the functionality ...
A: Analog Devices Corporation makes an accelerometer integrated circuit. It has a machined silicon ...
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| amplifier squelch circuit | 11/10/2005 | cleggsan |
Q: What is the disadvantage of a squelch circuit.
A: Nothing, really. Think of the squelch function as an automatic mute with some predetermined level ...
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| positive pressure | 10/29/2005 | Russ Kinner |
Q: I am having a problem with metal dust inside of electrical enclosures and I am trying to determine ...
A: Assuming that the cabinet when closed makes a decent seal, you could use a gas such as nitrogen to ...
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| Emitter Resistor | 10/23/2005 | John F. Iannuzzi |
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, ...
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| Electron Migration | 10/22/2005 | cleggsan |
Q: When a PN diode is forward biased the electrons in the n-type and the holes in the p-type combine ...
A: A metal contains only delocalised electrons so how can there be any holes? IN A PN JUNCTION THERE ...
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| science project | 10/22/2005 | John F. Iannuzzi |
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 ...
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| Signal DEveloping Resistor | 10/21/2005 | Dave Nyce |
Q: On the webpage I asked about, a bias resistor is connected to the emitter of the transistor but is ...
A: In the single resistor one, some base current is provided so that the base junction becomes forward ...
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| Signal DEveloping Resistor | 10/20/2005 | Dave Nyce |
Q: This webpage: http://www.tpub.com/content/neets/14180/css/14180_68.htm shows R1 being a resistor to ...
A: As shown, the Q1 circuit is not complete. The base needs a resistor to a positive voltage to ...
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| Power Ground | 10/19/2005 | cleggsan |
Q: So, in a power grid, the ground is only ever used as a reference for 0V/ a protective current path? ...
A: Delta connections are always 3 phase. WYE connections have a ground at the center. Delta ...
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| Power Ground | 10/17/2005 | cleggsan |
Q: This link: http://science.howstuffworks.com/electricity8.htm shows a transformer drum with a ground ...
A: It is not a "drum" - it is a transformer mounted in its housing. (And, yes, I know howstuffworks ...
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| RC coupling | 10/16/2005 | Dave Nyce |
Q: In RC coupling between amplifier stages where R1 C1 and R2 are used... why do you need R1 and R2? ...
A: Only the capacitor is needed to couple the AC signal, but the next amplifier stage needs to have its ...
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| Protection Diode | 10/15/2005 | John F. Iannuzzi |
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 ...
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