| Subject | Date Asked | Expert |
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| 7473ic | 7/4/2008 | cleggsan |
Q: why it used 7473ic to replace it to 555timer what happen?
A: The LM555 is a timer IC; prewired to perform many types of timing applications. The 7473 is a dual ...
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| direction change of ac syncronous motor with 02 wires | 7/4/2008 | cleggsan |
Q: we are having one ac synchornous motor for our lubrication pump - it is operated by 100 v ac - 50 ...
A: A synchronous motor is designed to run at a fixed rpm related to the ac line frequency. It runs at ...
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| Transformer | 7/3/2008 | cleggsan |
Q: What are the efeects if I use a 60 Hz power Transformer on 50 Hz System
A: I have to know the end product. So far as the transformer itself the heat build up - all other ...
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| rtd interfacing | 7/1/2008 | Dave Nyce |
Q: sir i need to interface an RTD with the 8086 microprocessor. this is a part of my project at a ...
A: 1. You can buy an RTD signal conditioner with a digital output type that you'd like to use. They ...
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| Thyristor checks | 7/1/2008 | cleggsan |
Q: What is a free firing thyristor? how do you check for one ? and if there is such a thing what sort ...
A: Well, it is very possible a defective or marginal thyristor is unstable and due to some temperature ...
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| Thyristor checks | 6/30/2008 | cleggsan |
Q: What is a free firing thyristor? how do you check for one ? and if there is such a thing what sort ...
A: To my knowledge there is no special category of a "free firing" thyristor or SCR. It is a generic ...
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| Thyristor checks | 6/28/2008 | cleggsan |
Q: What is a free firing thyristor? how do you check for one ? and if there is such a thing what sort ...
A: A thyristor, or SCR (Silicon Controlled Rectifier), is a diode that has an input to control when the ...
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| Astable Multivibrator | 6/27/2008 | cleggsan |
Q: I have a cabin with avail. power. It is wired like a normal home w/200 amp service box. There is a ...
A: The cost of 110v dc to ac inverter would be around the same cost as the lower voltage. You did not ...
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| Astable Multivibrator | 6/26/2008 | cleggsan |
Q: I have a cabin with avail. power. It is wired like a normal home w/200 amp service box. There is a ...
A: Are you sure there is not already installed a dc to ac converter in the cabin and the outlets are ...
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| Ringing Effect... Follow up | 6/25/2008 | cleggsan |
Q: You wanted to know more about the situation and I could not access my university email to get the ...
A: I am more confused than ever. I am going to have to have an overall schematic and block diagram of ...
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| 1996 sony trinitron tv sound problem | 6/25/2008 | cleggsan |
Q: my TV was blinking video in and out i researched it and took the cover off and turned the black knob ...
A: Can you tell me what adjustment you made inside the set? Is there a marking or indication as to ...
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| 'Ringing' Effect | 6/23/2008 | cleggsan |
Q: I work at a mill working on a 3 phase system. Delta primary, Wye secondary on the transformer and on ...
A: Is there an out-of-balance situation that requires the ground strap? If there is current in the ...
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| Sizing cable for garage | 6/23/2008 | cleggsan |
Q: I'm building a garage that is approximately 185 feet from our home circuit breaker box to where I ...
A: You must know the wattage requirements more precisely, I think. For example, a 15 amp circuit (at ...
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| mains testers | 6/22/2008 | cleggsan |
Q: I have a mains tester screwdriver with neon indicator. In trying to trace a mains wiring fault I was ...
A: Yes, to the above questions. I do not like or trust these little neon testers as they give false ...
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| Amplifier Pioneer SA-6300 | 6/21/2008 | cleggsan |
Q: I have acquired an old Pioneer SA-6300 amplifier which is faulty. There is a loud crackling noise in ...
A: If the circuit is similar to most audio power amps there is a coupling (or decoupling) capacitor in ...
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| tv power supply problem | 6/20/2008 | cleggsan |
Q: i bougth samsung tv 29"plano and i send it to philippines but sudenly after 30 minutes was it turn ...
A: Could you give me the model number? If this is a multi-voltage unit and you purchased it in the USA ...
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| Need a project topic | 6/20/2008 | cleggsan |
Q: I need a project topic on electronics and telecomminication. I`m in my final year, please i`ll need ...
A: I have had several questions along this line the last couple of months. Go to this site: ...
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| troucleshooting electrical control circuits | 6/19/2008 | cleggsan |
Q: if switch A closes Light A illuminates If Switch B closes Light B illuminates If Switch C closed ...
A: It is easy. Lights A and B are merely closed through a conventional SPST switch. Switch C is a ...
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| high amps low voltage | 6/18/2008 | cleggsan |
Q: I am conducting a test an 262 mcm and 535 mcm wire to be used in a windmill set up. Part of my test ...
A: Use a table or tables such as are found at: http://www.interfacebus.com/Copper_Wire_AWG_SIze.html ...
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| neuron network for timetabling | 6/17/2008 | cleggsan |
Q: I've got a project for the neuron network for timetabling. I want to make a software to generate ...
A: Sorry, I do not have much experience with MATLAB so I don't think I can be much help there. My ...
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| Half Wave Voltage Multilier Problem | 6/13/2008 | Dave Nyce |
Q: I hope you can help me with this problem. I have one of those Tennis Racket electronic bug zappers ...
A: If you have 1500V, it looks like the diode rated voltage is too low, at 1000V. You need to change ...
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| Electrical Engineering proj (Renewable sources) | 6/13/2008 | cleggsan |
Q: I'm Anand, a final year EEE student. I hav to Do a project this year. I'm Plannin to do somethin ...
A: http://www.electronicsinfoline.com/Electronics_Projects.shtml The first one on the above site is a ...
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| Battery and UPS | 6/11/2008 | Dave Nyce |
Q: I am going to purchase UPS of 3KVA. Company is offering a UPS with 120 AH. what is the advantage of ...
A: 3kVA (3000 volt-amps) means that it can power a load of 3 kW (3000 kilowatts) if it is a resistive ...
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| Trying to save the environment.. | 6/4/2008 | Dave Nyce |
Q: I have an old NEC battery charger, which list its output as: Vcc: 13.0V- 0A/1.7/2.8A VCV: 13.0V - ...
A: Sorry, but that won't quite work. To fully charge a car battery, it has been traditionally agreed ...
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| DC to AC Inverters | 5/21/2008 | Dave Nyce |
Q: How concerned should I be that a modified sine wave inverter, converting 12v DC to 120V AC, will ...
A: I don't think there would be any problem with a radio, CD player, TV or stereo, since they convert ...
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| project topics for final year students on electronics and telecommunication | 5/14/2008 | cleggsan |
Q: I am a final year student of electrical engineering at Ahmadu Bello University and humbly request ...
A: There are so many areas to choose from. You must look into an area that is of interest to you and ...
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| Charging my laptop with 110V and 400 HZ | 5/14/2008 | Dave Nyce |
Q: I fly very often and some pilots friendly allow me to recharge my laptop batteries using the ...
A: Your charger should have a listing of the acceptable voltage range and frequency range. Mine says ...
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| Impressed current cathodic protection (ICCP) | 5/12/2008 | cleggsan |
Q: I want to know if the electrical power consumption of the ICCP is constant when it is working, or ...
A: From your comments I just wanted to know what part of my answer you did not understand. I am also ...
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| DC Generator with low rpm, high power output. | 5/8/2008 | cleggsan |
Q: I am interested in doing a small experiment, where a DC Generator, rotates at 1-10 rpm, and ...
A: It would depend upon the motor and its efficiency. But, the 1kg at 4cm is a force of 40 ...
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| high amps under load | 5/7/2008 | cleggsan |
Q: we have a pump that is drawing high amps under load(filling the banks) but when no load(recert to ...
A: Oh, this is a systems problem. I think you should look into the control electronics. It is likely ...
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| high amps under load | 5/7/2008 | cleggsan |
Q: we have a pump that is drawing high amps under load(filling the banks) but when no load(recert to ...
A: How do you know it is too high? What current did you measure? And when does it begin to go to ...
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| Practical Application (Sawmill) | 5/6/2008 | cleggsan |
Q: My name is Luke Robson, I recently completed 2nd year (of 4 years) of the engineering program at the ...
A: I would need to know more about the wiring of the lines and their layout. But, to give you some ...
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| DC Generator with low rpm, high power output. | 5/5/2008 | cleggsan |
Q: I am interested in doing a small experiment, where a DC Generator, rotates at 1-10 rpm, and ...
A: Power of 12v @ 5a is 60w. 60w = 0.08 hp From above it is very realizable and could be rather easily ...
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| microprocessor | 5/1/2008 | cleggsan |
Q: explain me lines given below in brief, "in 8086 micrroprocessor with only four segments ,we may feel ...
A: Is this the book and page you read the statement? ...
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| general | 4/30/2008 | cleggsan |
Q:
A: I have no idea. Perhaps you are referring to a slip ring; these are used in motors and generators to ...
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| Star Delta Motor Theory | 4/29/2008 | cleggsan |
Q: Could you tell me the theory behind the star and delta connections in a three phase ac motor with ...
A: http://www.epanorama.net/wwwboard/messages/1786.html http://www.wiringmanual.com/SBIX-1.html ...
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| Regarding transformer | 4/26/2008 | cleggsan |
Q: Respected sir, I want expect clear explanation from you for myWe have conducted a testing in ...
A: Sorry, I cannot give you a clear answer because the testing conditions are not clear to me, the ...
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| inductive charging | 4/22/2008 | cleggsan |
Q: I am an industrial designer at CCA. I am designing an electric pedometer that clips onto shoelaces ...
A: Depends entirely upon two things: ONE - the type of materials the magnets are made of. (Some ...
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| Voltage regulation | 4/22/2008 | Dave Nyce |
Q: My original idea was to use the stator and regulator from an old motorcycle, but 1/8" not enough ...
A: The cooler probably takes at least 40W, so your load would total at about 100W. If it is providing ...
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| CT Ratio Selection | 4/21/2008 | cleggsan |
Q: I have 11kV Panel Bus bar of 800A and was upgraded to 1600A and a CT of 1660/16 was used, so for the ...
A: I don't know the standards on this type of setting. It involves knowing what the ANSI standard 242 ...
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