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Topic: How to make a transformer

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	Transformer - Wikipedia, the free encyclopedia
		Transformers come in a range of sizes from a thumbnail-sized coupling transformer hidden inside a stage microphone to gigawatt units used to interconnect large portions of national power grids, all operating with the same basic principles and with many similarities in their parts.
		Transformers may also be enclosed by magnetic shields, electrostatic shields, or both to prevent outside interference from affecting the operation of the transformer or to prevent the transformer from affecting the operation of other devices (such as CRTs in close proximity to the transformer).
		Transformers may also be enclosed for reasons of safety, both to prevent contact with the transformer during normal operation and to contain possible fires that occur as a result of abnormal operation.
	en.wikipedia.org /wiki/Transformer (4554 words)

	A Boyce's Electrical Transformers Webpage
		For a transformer to operate continuously, the primary winding must be connected to an intermittent source of current or to some source of alternating current.
		Transformer Losses: A properly designed transformer is a very efficient device; there are certain factors that prevent the transformation of the input voltage and current to the desired output voltage and current with 100% efficiency.
		In iron core transformers, the iron must also be considered as a conductor because it is affected by the magnetic field just as the secondary winding is. Small voltages are induced in the core by the changing magnetic field; these currents cause I squared R losses in the core.
	ourworld.compuserve.com /homepages/boyce_smith/actions.htm (859 words)

	Transformers
		The transformer by itself is not a complete unit therefore UL recognizes it as a component.
		The further the distance between the fixture and the transformer, the bigger the voltage drop, and this is what causes the fixtures to flicker.
		The key is to select a transformer that is equal to the total of the wattage, or one that is the next step up.
	ylighting.com /transformers.html (1288 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		A neon sign (luminous tube) transformer is the usual source though an oil burner ignition transformer will work in a pinch (some say better and cheaper) or you could build an inverter type power supply.
		Connect the high tension output of the transformer to the two wires and you should be all set.
		Neon sign transformers have current limited outputs - 30 mA is typical - but that is still highly dangerous - lethal under the wrong conditions.
	www.ee.washington.edu /circuit_archive/circuits/jacobs.html (585 words)

	How to make a transformer - Wikipedia, the free encyclopedia
		This page has been deleted, and should not be re-created without a good reason.
		Search for How to make a transformer in other articles.
		If so, you may look for How to make a transformer in Wiktionary, our sister dictionary project.
	en.wikipedia.org /wiki/How_to_make_a_transformer (181 words)

	Encyclopedia: Making a transformer (Site not responding. Last check: 2007-10-21)
		A transformer is a device that converts one AC voltage to another.
		A detailed description of how they work is given under transformer.
		Strip the insulation off the end of a long piece of copper wire and wrap it 30 times around a cylinder of soft iron, to make a solenoid.
	www.nationmaster.com /encyclopedia/Making-a-transformer (411 words)

	Transformer Banks 2: Three Phase Connections: Course Information (Site not responding. Last check: 2007-10-21)
		Explain how the turns ratio of the transformer applies to current output.
		Explain how the turns ratio of the transformer applies to voltage output.
		Connect the transformer secondary coils in parallel for a four-bushing transformer.
	www.masterytech.com /tbcon.htm (511 words)

	The power transformer
		When a transformer is not being used, the return side of the ac line is connected to the metal chassis.
		During the positive alternation of input voltage, the sine wave applied to the diode makes the anode positive with respect to the cathode.
		As indicated by the shaded area of the output waveform in view B, this current exists during the entire period of time that the anode is positive with respect to the cathode (in other words, for the first 180 degrees of the input sine wave).
	www.tpub.com /neets/book7/27a.htm (761 words)

	Transformers Part 1 - Beginners' Guide to Electronics
		Transformer cores have a quoted permeability, which is a measure of how well they "conduct" a magnetic field.
		Transformers are usually designed based on the power required, and this determines the core size for a given core material.
		All countries have safety standards that apply to transformers where electrical isolation is important, and if in any doubt about the safety of a transformer for a particular purpose, make sure that you verify that the transformer complies with the relevant standard(s).
	sound.westhost.com /xfmr.htm (7233 words)

	Fundamental Series Item : Transformer Efficiency (Site not responding. Last check: 2007-10-21)
		Transformer losses in power distribution networks can exceed 3% of the total electrical power generated and are estimated to total 140 billion kilowatt-hours (kWh) per year in the U.S. The Energy Star program estimates that converting these transformers to higher efficiency units would reduce wasted electricity by about 61 billion kWh each year.
		Core losses continue whenever the transformer is energized; therefore, when the expected loading is variable or unknown, the size selection is a compromise between core loss and coil loss.
		Making the case for utilities to purchase energy-efficient transformers is difficult.
	www.energyusernews.com /CDA/Article_Information/Fundamentals_Item/0,2637,76086,00.html (1883 words)

	Various Schematics and Diagrams
		Information on isolation transformers (essential for safety) and variable transformers (Variacs), series light bulb adapter, and other Incredibly Handy Widgets(tm) for your test bench will be found in the document: Troubleshooting and Repair of Consumer Electronic Equipment and possibly in the specific document for each type of equipment.
		The drive transformer is from a B/W computer monitor (actually a video display terminal) and has a turns ratio of 4:1 wound on a 5/16" square by 3/8" long nylon bobbin on a gapped ferrite double E core.
		The power transformer (T1) that I used was actually rewound from one that was rated at 12 V, 1 A. This was a high quality transformer, so removing 2/3rds of the secondary was quite a pain.
	www.repairfaq.org /sam/samschem.htm (16415 words)

	PS Audio - Finding and Fixing Hum
		The short and simple answer is that transformers hum because of an effect known as 'lamination rattle' caused by DC voltage on the line or poor construction or both.
		This is due to the fact that transformers work on magnetic fields and the magnetic fields need to change their polarity (North to South and back again) to make the transformer work properly.
		Because transformers work when the coil magnets switch poles from North to South and back again, 60 times a second, DC forces the input coil to always sit in one direction and this makes the transformer a little crazy so it hums.
	www.psaudio.com /articles/hum.asp (2339 words)

	How to Make a Dimmer Box
		We used a variac on the input to the Malibu transformer to dim the lights.
		The light is controlled by a common lamp dimmer, the same kind that you might mount in the wall to control a permanent lamp fixture.
		Just make sure that you do not exceed the rated capacity of the lamp dimmer that you used in the box.
	wolfstone.halloweenhost.com /HalloweenTech/dimbox_DimmerBox.html (627 words)

	Description of the xslt transformer (Site not responding. Last check: 2007-10-21)
		It transforms the sax stream using this stylesheet.
		Note that this might have issues concerning cachability of the generated output of this transformer, the caching algorithm not only checks the last modification date but also all values of the request parameters.
		Note that this might have issues concerning cachability of the generated output of this transformer as the caching algorithm adds this values to the validation phase.
	cocoon.apache.org /2.1/userdocs/transformers/xslt-transformer.html (449 words)

	How to make a transformer with countdown timer - Age of Mythology Heaven Forum
		How to make a transformer with countdown timer - Age of Mythology Heaven Forum
		How to make a transformer with countdown timer
		In this guide I will explain how to make a unit A transform into a unit B, change back to unit A after a specific time while u can see exactly how much time you have left as unit B
	aom.heavengames.com /cgi-bin/forums/display.cgi?action=ct&f=13,22128,0,10 (508 words)

	JFugue - Java API for Music Programming: Class PatternTransformer
		This class is used to transform a pattern.
		Extend this method to make your transformer modify the instrument.
		Transforms the pattern, according to the event method that you have presumably extended.
	www.jfugue.org /javadoc/org/jfugue/PatternTransformer.html (385 words)

	Inertial Electrostatic Confinement (IEC) (Site not responding. Last check: 2007-10-21)
		To make a useful power reactor, you must have particle velocity, density, and confinement time sufficient to produce enough reactions to generate more power than is required to drive the reaction.
		Fast-moving ions needed to cause fusion make larger orbits than slower, cooler ions, and thus temperature and density are in constant conflict.
		I have achieved the blue glow of convergent ion focus using a furnace ignition transformer and a pair of high-voltage diodes.
	torsatron.tripod.com /fusor/fusor.html (6936 words)

	Mosfet Circuit Details (Site not responding. Last check: 2007-10-21)
		The output transformer can be a ferrite core to make a broadband transformer, an iron core to make a tuned transformer, or a commercial transformer for 10.7 MHz or 455kHz.
		The extra connections around the output transformer are used to connect a homemade ferrite or iron core transformer.
		Disconnecting B+ from the transformer as a way to check for a good MOSFET has turned out to be the only way to accurately test for a good MOSFET.
	www.pan-tex.net /usr/r/receivers/ra02017.htm (1472 words)

	Scitoys Message Board: Rewireing a transformer to make it stronger
		To direct current, any inductor, no matter how big or small, is just a piece of wire with some simple intrinsic resistance.
		Transformers with huge iron cores, and many, many windings have huge inductances, and are able to see large ac currents without saturating.
		Hence a primary winding of 2 wraps would be a very poor design for any transformer that plugs into a big, stiff voltage like the 117VAC we use in the United States.
	www.scitoys.com /board/messages/1/277.html?1108896931 (767 words)

	Galvanometer Theory of Operation
		The patent teaches how to make a dynamo transformer, otherwise known as a torque motor, with two very special properties.
		When a current is applied to the Mueller device, the rotor moves to align itself with the stator poles, as shown at right.
		To make the motor into a useful positioning device, such as a scanner, a torsion spring can be attached to the rotor.
	laser.shows.org /theoryof.htm (561 words)

	Science Project: electrostatic stereo speakers
		It is generally easier to make small drivers than to make big ones, but with small drivers you will need a lot of them so mounting them can be a pain.
		Transformers are usually rated in terms of rms voltages.
		If you have a transformer that is rated for 117 VAC in and 700 Vrms out, the DC output voltages you will get from a doubler, tripler and quadrupler circuits will be 1980, 2970, and 3960 VDC.
	www.amasci.com /esloud/eslhwto.html (4868 words)

	Izzy Wizzy Audio
		It was designed for moving coil cartridges and I have no idea how it goes with a moving magnet straight in without the input transformer.
		The main design aim other than to make it sound good was to give the circuit a solid reference.
		The transformer is 4x overated for the duty - whether this is needed for choke input is debateable.
	www.izzy-wizzy.com /audio/preampnew.html (2749 words)

	http://www.r50rd.co.uk/research/internal/v2i/engin/ (Site not responding. Last check: 2007-10-21)
		Testing of the robotic arm was fraught with last minute surprises and glitches as it was the first of the major components to be completed.
		The lessons I learned working with the cable drives on the forearm allowed me to make some refinements to the leg design before the parts were sent out to be machined which probably saved me a few weeks time.
		Each object state (including the robot itself) is kept in world coordinates, which allows the robot to make estimates of the velocities of each object it is looking at.
	www.r50rd.co.uk /research/internal/v2i/engin (1703 words)

	Altair - How to Make an Electromagnetic Crusher
		Altair - How to Make an Electromagnetic Crusher
		Making a wooden trolley to hold the capacitor bank.
		The top covers are sawed into thirds to make more insulating blanks like the ones originally sandwiched between the diode strips.
	www.altair.org /crusher.htm (1194 words)

	Xbox Addict Asylum - What do you guys/girls think of a Transformer game for the XBOX.
		Transformers was the toy back than everybody had a Transformer toy and now the Transformers will be the game today.
		Just wait and see if they take time with this game it will be one of the best.
		But as far as im conserned the closest ive been to playing a good transformer game is when i wore a optimis prime skin in quake.
	www.xboxaddict.com /forums/showthread.php?t=6206 (170 words)

	Altair - Nikola Tesla and How to Make a Tesla Coil
		Read how Tesla was Erased at the Smithsonian and get a kewul Tesla Tshirt while helping the class raise funds for more busts like this one at Yale University.
		The Tesla Coil was delightfully awe inspiring, with its shattering roar and streamers of purple fire writhing in the air.
		Was wound on a 2-1/2 inch grey PVC pipe and was excited from a 15kV neon transformer, a spark gap made of coat hanger and a plastic cup liberated from the lunch room.
	www.altair.org /tesla.htm (2215 words)

	Transformer Discussions: Frequency in transformers and how do (Site not responding. Last check: 2007-10-21)
		Transformer Discussions: Frequency in transformers and how do
		I have been assigned a project for my electrical class to make a step up transformer of a 5:1 ratio with max input of 9V.
		I took an hollow iron core and wound 30 turns of wire around it for the primary and 150 turns for the secondary, for some reason it doesn't seem to work.
	www.eio.com /public/xformer/0164.html (191 words)

	More Than Meets the Eye (Site not responding. Last check: 2007-10-21)
		I had 103 Transformers last time I counted, but that is more a reflection on the affluence of my relatives than my love for the Transformers.
		I realized soon enough, though, that the engineering necessary to make a Transformer would be entirely too difficult.
		I apologize to anyone who had their TFs thrown out and wish to recover some of the magic...my screaming is only due to my desire to never lose my own.
	www.sccs.swarthmore.edu /~dylan/trans.html (179 words)

	Electrical Transformers Webring (Site not responding. Last check: 2007-10-21)
		Transformers are inductive components, comprising an electrical conductor wound on a core of magnetic material, used to transform voltage and current to different values.
		The ring's purpose is to bring together manufacturers, suppliers and users, with a ring dedicated to electrical transformers but open to all applications.
		This utility checks every member of the ring to make sure their pages are up and the pages containing the required HTML code is operational.
	www.isomatic.co.uk /TFwebring.htm (548 words)

	Doorbell transformer v.o.c?
		I was trying to check the transformer to make sure it was compatible and had a couple of questions.
		I am guessing 25 v.o.c means the transformer is rated up to 25 volts and would be suitable for a new 24v doorbell but I am wanting to make sure.
		transformer by LarryG October 6th, 2004 04:36 PM also by LarryG October 6th, 2004 04:40 PM voltage check by carl21l October 6th, 2004 06:24 PM Voltage and wattage by Jasper October 6th, 2004 10:28 PM by Unregistered-Dodgeman October 7th, 2004 09:04 AM by Jasper October 7th, 2004 03:09 PM Login
	www.bobvila.com /wwwboard/messages/239828.html (232 words)

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