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Line Following Circuit
2012-02-04 09:02:00 I am a mechanical engineer and I want to build a profile cutter that will cut steel from a drawing template. I have searched the net but have not come acros a useable solution yet. Are there detectors with optics that could be focused on the line? It seems the main problem lies in detecting the li
Light Sensing Circuit
2012-02-03 00:30:00 Hello folks. I have a bit of a problem. I studied electronics over 30 years ago and have seldom used it. I am trying to build a simple circuit to turn a single LED on at dark. I have used the following circuit and it works, but the problem is the light intensity required to turn off the LED is high
Electrical Circuit Contact Points & 'Gounding' switch
2012-02-02 05:38:00 I'm an architect from Melbourne trying to find an electrical solution where the specialist have not, so apologies for this novice enquiry. 1. I am designing a door for a concert hall stage that needs to open silently. A magnetic lock at the head allows this function. We want the door release to be
Circuit Breaker Rating
2012-01-30 21:07:00 i wanna know what is the difference between iu and in. i have a circuit breaker that has the following nameplate in=63 A , iu= 160A
Filter Desin for an Inverter Circuit
2012-01-27 05:46:00 I am design a filter without any load. It gives output perfectly a sin wave. But waveform becomes distorted when i applied load. So please tell me the design procedure of filter which will be independent of load
Circuit Breaker Open/Close Time
2012-01-24 16:22:00 Is there any concern if the closing time of the CB is faster than the specified timing. spec 80 millisec. closing time 60 millisec. Thanks,
Circuit Breaker Close And Open Coil Resistance Measurement
2012-01-18 21:42:00 What do I have to use to measure the open and close coil resistance of the HV/MV circuit breaker control coils. Does regular ohm-meter do the accurate measurement (I mean because of the coil inductance?) or I have to use a ductor (micro-ohm) tester? Thank you
Short Circuit Calculation
2012-01-13 17:57:00 i want a knowlwdge about kA like 50ka what is this i m new student of electrical Engeniring
Battery Equalizer Circuit
2012-01-13 17:37:00 I remember seeing a simple circuit to equalize 6 batteries connected in series.Each battery required the circuit,and it simply by passed the battery when it reached full charge.This insured that all of the batteries in the series were equally charged. It was designed for 6ea. 6 volt golf cart batter
Regenerative Braking Circuit for 12v,200w DC Motor
2012-01-13 07:48:00 i want to develop a regenerative braking circuit for a 12v,200w dc motor. a bicycle wheel would be connected to the motor as load. regenerative would be activated when the speed of the load exceeds a reference value. pic micro controller is used for monitoring the speed. can anyone help me with circ
MV Circuit Breaker Timing Test
2012-01-10 21:41:00 Just I want to know the testing procedure of the MV circuit breaker timing test: 1. If this test could be done, while the breaker is connected to the test through the test cord. or the test cord has to be disconnected and the DC voltage supply goes through the test instrument and connected to open/
Comments on Short Circuit Calculation Needed
2012-01-09 05:37:00 Hello everyone. I am new college pass out. I got some electrical drawing and calculated the short circuit but there is variation between my calculation and the contractor calculation. Here I have attached my calculation please comment on it (Not a home work question). I want to know any other factor
Auto Mains Failure Circuit Diagram
2012-01-07 21:39:00 If any one has complete diagram of a AMF circuit Pl send or tell how the AMF will build?
Surge Protection Circuit
2012-01-04 13:35:00 As shown above we have Eddy current dynamometer, its 3 windings are in series parallel to surge protection circuit (combination of resistance and surge suppression diodes. 1) How reliable is parallel safety circuit, since under normal condition the safety circuit is open circuit. If it does not w
Noise in an AC Circuit
2012-01-03 19:10:00 I have a noise problem in a square wave signal. It is 3 to 5 volts at 45 to 50 hz current is 200ma, it also has 80ma of DC current that needs removing and it is a SMD board I have tryed LC filters but when I get the right frequency I reduce the current excessivly. HELP!!!!!!!!! Rachael
Why Single Core Cable Used in 3phase Wiring Circuit?
2012-01-02 11:18:00 Normally i found 3 Core cables are used most commonly in LT transmission system.But some time there are designs which uses 1C cables for 3Phase LT transmission system.What is the diffrerance.Is it advicable for using 1C cable in place of 3C cable?
Why Single Core Cable Used in 3phase Wiring Circuit?
2012-01-02 10:41:00 Normally i found 3 Core cables are used most commonly in LT transmission system.But some time there are designs which uses 1C cables for 3Phase LT transmission system.What is the diffrerance.Is it advicable for using 1C cable in place of 3C cable?
IEE Circuit Design-Over Engineered
2012-01-02 07:58:00 Dear All first of all I would like to wish you all a HAPPY NEW 2012 YEAR. What I would like to discuss with you all today is the over-engineered way of desinging electrical circuits as per the IEE regulations. Taking a hypothetical example for a normal single phase lighting circuit with 16 Amp MCB
Automatic Charge/Invert Circuit
2012-01-01 20:44:00 I have an invertor with a built-in charger.I have to manually switch it to "invert" when the power goes and also manually switch to "charge" when the power comes back. what external circuit can i introduce to make it invert dc to ac automatically when there is a power fail? Also how can i make it ch
DTC P0141-O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
2011-12-30 07:29:00 The above subject was the code I got out of my OBD scanner after scanning my toyota RAV4 2001. 1. Can somebody explain this? 2. How do I solve this problem? 3. How do I locate the sensor? Thank you. 'Yinka
Providing for Motor Short Circuit Forces in Its Foundation Design
2011-12-27 10:07:00 While designing a structural foundation for an electric motor, is it necessary to calculate and provide for the forces that may arise due to short circuits in motor windings? if the answer is 'yes', then where can I get the relevant information?
Circuit Protection Using Capacitor
2011-12-24 19:54:00 This link provides three ways of protecting an application against the mains voltage. http://www.vishay.com/docs/2815-3/anaccaps.pdf Can anyone tell me what the waveform at the other side of the X Class capacitor would be? Obviously, the voltage between the two points (A-B) would depend on the c
New Load to Circuit Trips Breaker After a Period of Time
2011-12-19 19:26:00 I have just installed two ceiling fans and rerouted some lighting on my new covered patio. I wired and hung the fans then ran the wiring back to an existing junction box on the 20A circuit. After turning the breaker off, I connected everything. I flipped the breaker back on and tested the new "fixtu
3 Phase Distribution Board With Dedicated Circuit
2011-12-15 11:00:00 whats kind of fauild if red phase earth leakage trips when i switch other earth leakage of blue and white phases while mains curcuit breakers of white and blue phase are off?i am thinking of neutral fauild. whats wrong if the neutral bar get hot and burns the insulation of neutral bar?
Bosch LE2/LU2 Jetronic Circuit
2011-12-13 05:04:00 Wise people, I have scoured the internet and a few libraries for a circuit diagram of a Bosch LE2 or LU2 Jetronic ECU circuit diagram without success. In this unit the single PCB is surface mount on one side and leaded components on the other including two or three proprietry thick film hybrid modu
Trip Circuit Supervision
2011-11-27 18:45:00 why trip circuit supervision is taking through breaker contact? what happen if take directly?
Status of current in voltage divider circuit
2011-11-25 09:58:00 Can anyone clarify my doubt...! The question is, When a load resistance is removed from the output of a voltage divider circuit, the current drawn from the source..........? a) decreaes b) increases c) remains the same d) is cut off I need exact answer...
Short Circuit Current for Sychrinized DG Set.
2011-11-19 12:33:00 We have 6 generators each of 2000 kVA, 415 volt and will run in synchronizing. The value of direct axis sub transient reactant is 13%. According to this the value of fault current on bus will come approx (21*6 =126 Ka). So we need a 125 Ka breaker and a bus or can we use circuit breaker with low bre
Short Circuit Protection for Triac
2011-11-18 12:02:00 Triac in AC mains circuit, under load short circuit condition, will be damaged with certainty, even with fuse or MCB protection. Fuse and MCB are not fast enough to cut off short circuit current. Does any one have idea on how to protect such circuit? Thank you.
RC Snubber Circuit
2011-11-16 14:24:00 I am using 5V,16A relay with voltage rating 250V AC. I want to protect relay contact through RC quenching circuit, please suggest value and rating of Resistance and Capacitance for arc suppression. Load current is 16A.
IEC v/s IEEE/ANSI - Short Circuit Current Calculation Designations
2011-11-15 11:59:00 First many thanks for your posts they are very knowledgeable. I have question in regards to the Short Circuit Current (SCC) Calculations IEC, IEEE/ANSI. Basically I am looking for a table (or a comparison table) which shows the detail description, IEC designation and IEEE/ANSI designation for the
Harmonic Filter in A.C. Circuit
2011-11-15 06:46:00 We have installed power factor correction capacitor bank, now to reduce harmonics current, how to decide sizing of inductor?
36V Strobe Circuit
2011-11-12 18:08:00 Anyone have any ideas on getting a 36V, 1A strobe circuit up and running? Hoping there's something "off the shelf" in lieu of 555 with switching mosfets & voltage regulators. Trying to keep parts to a bare minimum. Looking for 5 flash/sec rate.
Circuit Breaker Rating
2011-11-05 22:43:00 hi everbody, i m just look at MCB rating and found that the there is no any proper series or order between them like 6 A, 10 A, 13 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A, 80 A and 100A why these rating like this? why they are not in proper series?... is any specific reason for such type of rat
ATS Circuit Diagram
2011-11-03 13:40:00 Please can anybody get me a complete CIRCUIT DIAGRAM of AUTOMATIC TRANSFER SWITCH containing TIMER RELAY?
Coulthard Circuit of the Americas documentary on BBC
2011-10-31 14:44:00 As followup to our earlier post “David Coultard hoons it up in the Red Bull F1 racecar on the streets of Austin Texas“, here is a short documentary aired by BBC this past weekend as part of their India F1 coverage. It was shot at the Circuit of the Americas and tells the story of the ...
Modifying the Dimmer Circuit
2011-10-23 20:47:00 Hi guys, I have this link which has a basic dimmer circuit (look at the Leading Dimmer Circuit). If I am right, the variable resistance is used to change waveform across the load for a leading edge dimmer. Its set to 50% in the waveforms shown. My question is, how can I modify circuit for the
MRI study finds that depression uncouples brain?s hate circuit
2011-10-04 14:13:00 A new study using MRI scans, led by Professor Jianfeng Feng, from the University of Warwick?s Department of Computer Science, has found that depression frequently seems to uncouple the brain?s ?Hate Circuit?. The study entitled ?Depression Uncouples Brain Hate Circuit? is published today (Tuesday 4th October 2011) in the journal Molecular Psychiatry. The researchers used MRI scanners to scan the brain activity in 39 depressed people (23 female 16 male) and 37 control subjects who were not depressed (14 female 23 male). The researchers found the fMRI scans revealed significant differences in the brain circuitry of the two groups. The greatest difference observed in the depressed patients was the uncoupling of the so-called ?hate circuit? involving the superior frontal gyrus, insula and putamen. Other major changes occurred in circuits related to risk and action responses, reward and emotion, attention and memory processing. The hate circuit was first clearly identified in 2008 by...
Circuit Franco Belge 2011
2011-09-26 07:21:00 Anchel.nl Circuit Franco Belge 2011 - http://skilfan.anchel.nl/2011..-. September 25 from SkilFan - Comment - Like
By: FotoBlog Toppers
During Court Hearing, Conservative Fifth Circuit Chief Judge Shouts Down Pr
2011-09-25 20:38:00 Via Scoop.it – Green Party The Fifth Circuit is probably the most conservative federal appeals court in the country. It recently sanctioned a cheerleader and alleged rape victim because she sued the school district that required her to cheer for her alleged rapist.Show original Tags: chief judge, federal appeals court, rape victim, alleged rape, green ...
By: News for Greens
Timberland Men?s All Mountain Inferno Low Circuit Trail Running Shoe B003EO
2011-09-14 09:48:00 Tackle any climb in the Timberland® All Mountain Inferno GTX men's trail shoe. It's designed using a breathable blend of mesh and synthetic materials with a waterproof GORE-TEX® membrane; the combination EVA/polyurethane midsole provides responsive cushioning, while a TPU plate enhances stability. The Green Rubber™ outsole delivers dynamic traction on unpredictable surfaces. Timberland's All Mountain Inferno Low Circuit shoe features Green Rubber? soles made of 42% recycled rubber and a lining made with 50% recycled PET to help leave the outdoors the way you found it. The combination polyester air mesh and synthetic upper ensures lightweight performance, and the removable OrthoLite
Circuit Board Jewelry Box - A Better Way To Recycle Circuit Boards
2011-06-16 21:01:00 The Circuit Board Jewelry Box is made solely from pieces of circuit boards soldered together. Instead of throwing these non-decompositioning babies into a landfill, someone
Free Circuit Workout: No Weights Needed
2011-06-16 18:09:00 A great 8 exercise circuit that you can fit into your daily routine could be the difference between maintaining your goal weight and falling off...
Yoshikazu Yahiro: Circuit.V.Panther - "Sexy Finger lll"
2011-05-03 19:12:00 New album April 13.2011 on sale? ?Sexy Finger III? 1.Warp 2.Samurai Ranger 3 .Labyrinth 4.First Love 5.Mission 6.Dear... From 2011 new album "Sexy Finger lll", now available in most Japan Music Webstores ! http://www.hmv.co.jp/en/product-/detail/4004169 Panther's Official Site : http://sexy-finger.com/ previous releases Panther - Labyrinth (2011)
9th Circuit Shoots Down SB1070 Appeal - Supreme Court On The Way [Update]
2011-04-11 20:19:00 The ridiculous 9th Circuit Court of Appeals has refused an appeal on an injunction brought against SB1070 by the Department of Justice. The appeals court claims in its finding that it "oversteps" the federal law. The 9th Circuit Court is...
By: Diggers Realm
PIN Diode Switch in a Frequency Multiplier Circuit
2010-10-28 15:37:00 Hello everyone, We are using a SP4T PIN diode switch to switch to one of four temperature compensated crystal oscillators with center frequencies in the UHF range. This is passed through a frequency multiplier of multiplication factor 96 and we see the output (96th harmonic) in the X-band (11
Wal-Mart Shares Drop As 9th Circuit U.S. Court of Appeals Opens Door For La
2010-04-27 03:25:00 OOPS — The “Oh, So Smiley One“, China’s Number One Customer And Sir Hillary Rodham Clinton’s Former Employer Is In BIG Trouble Again… Smile, y’all — Wally-World has been dodging the old “gender bias” bullet since 2001 and according to The... This is only a comment summary. Visit http://guntotingliberal.com to view the lastest content complete with some of the most outrageous original photoshops in the political blogosphere!
Circuit City Free Shipping With Any Seagate 2tb Freeagent External Hard Dri
2010-04-02 15:03:00 Circuit City Free Shipping With Any Seagate 2tb Freeagent External Hard Drive USB 2.0 Purchase. Published by KeepCash.com at 8:03 AM - Fri, Apr 2 View details Compare it
Circuit City Free Shipping With Any Viore 22" LCD HDTV / Monitor Lc22vh56pb
2010-04-02 15:03:00 Circuit City Free Shipping With Any Viore 22" LCD HDTV / Monitor Lc22vh56pb 1080i/720p 16:9 Hdmi W/ Speakers Purchase. Published by KeepCash.com at 8:03 AM - Fri, Apr 2 View details Compare it |
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