can a full wave rectifier be built without using a transformer?
107063
Yes, a full-wave rectifier can be made with only four diodes. No transformer is required.
738167
Unless you are playing with low voltage, please find some other project. 120 Volt or 220 volt is very dangerous.\n\nAny way you will need all the components in same voltage I say get every thing in under 9 volts to make things easy, they must operate in 6 to 8 volt range so you will have voltage to spare. You may not be able to find them readily.\n\nThis is how it works.\n\nClapping sound is picked up by micro phone.\n\nThis produces a signal, that will close an open circuit on a lamp(or any thing that you need to turn on like a bell).\n\nTo make a package, like the one you buy in the store, it took quite a few years to perfect it, and they had experts working on it.. \n\n1.  9 volt battery. few to operate the systems.\n2.  red and black wire.\n3.  9 volt lamp.\n4.   6 volt Micro phone.\n5.   Sound activated switch, 6 volt \n6.   Tapes electrical.\n7.    cardboard to mount every thing.\n8.    cutting tool to make connections.\n9.    Solder iron and silver solder wire.\n10.   Different types of connectors.\n11.   Glue to put components on the board. \n\nEdmund-scientific.com may have a kit, it is on Internet.\n\nBuy the kit and assemble it.
834597
No \nThere are no optimal frequencies for a transformer.
869383
(m)\n\n transformer is an electrical device used to convert AC power at a certain voltage level to AC power at a different voltage, but at the same frequency. \n\nThe construction of a transformer includes a ferromagnetic core around which multiple coils, or windings, of wire are wrapped. The input line connects to the 'primary' coil, while the output lines connect to 'secondary' coils. The alternating current in the primary coil induces an alternating magnetic flux that 'flows' around the ferromagnetic core, changing direction during each electrical cycle. The alternating flux in the core in turn induces an alternating current in each of the secondary coils. The voltage at each of the secondary coils is directly related to the primary voltage by the turns ratio, or the number of turns in the primary coil divided by the number turns in the secondary coil. For instance, if the primary coil consists of 100 turns and carries 480 volts and a secondary coil consists of 25 turns, the secondary voltage is then: \n\nsecondary voltage = (480 volts) * (25/100) = 120 volts \n\nA transformer may have multiple secondary coils to feed a number of electrical loads; however, power must be conserved, so the sum of the output power must equal the sum of the input power minus losses. Energy losses in transformers are due to a number of factors: these are copper losses in the coils themselves due to material resistance, core losses due to hysteresis (the reluctance of the material's magnetic domains to reverse during each electrical cycle), and eddy currents.
438682
sure. go to a science store or look up schematics on the web.
46766
DC generator would have a rectifier built in to convert the AC to DC.
722546
I use a power inverter.
775866
I don't think you can do that. you need the number of amps and the power factor for that device.
810773
The following assumes you want to generate square and\ntriangle waves of relatively low frequencies:\n\nJust use a microcontroller. Use one output pin for the square\nwave and feed it through a D-type flip-flop configured as a \ndivide-by-two to get 50% duty cycle on the output. For the\ntriangle wave you can use PWM (Pulse Width Modulation)\nand hook the output pin to an RC (Resistor Capacitor) filter\nto form a simple D/A (Digital to Analog) converter.\n\nAlternatively, you can either buy a microcontroller with a\nbuilt-in D/A converter or add one externally. This will allow\ngeneration of any arbitrary waveform.\n\nA few of the many manufacturers of suitable microcontrollers\nare: \n\nAtmel, Microchip, Silicon Laboratories, and Texas Instruments.
1040867
Using 3 phase current, it is possible to get 3 times the energy down the same wire - so it is much more efficient.  Each phase is 120 degrees out from the others, so the signal looks kind of like braided hair, when one phase is at the peak, the other two are crossing at 70%, one going up the other going down.  Once we get the energy to where we want to use it, then we can tap off the different phases for single phase use. \n\nI forget about the delta and wye stuff, it's been a while. \n\nCheers!
489114
basically you cannot directly convert 12 volt DC into 120 volt DC, because it is DC. You can only convert these by first convert 12 volt DC into 12 volt AC, using an inverter. Then 12 volt AC can be converted into 120 volt AC through the use of transformer. After which you can convert 120 volt AC to 120 volt DC using a rectifier.
230874
Hey, ive built some circuits....check out:\nwww.techlib.com\nwww.home.maine.rr.com\nwww.hanssummers.com\nwww.angelfire.com\nif they don't work try http:\nthey are all good website to build transmitters/recievers.......or google it
831976
Yes, you'll need a filter to get rid of the ripple. The voltage will be all in one polarity but will go from some peak to zero volts. You'll need a minimum of a capacitor in there if you want something close to a DC voltage.
679718
The deciding factor here would be the Utility Company Service Entrance. THAT cannot be rewired by you! The other two points ( Low side of transformer and Motor Windings) can easily be configured either way by simply rewiring the 3 windings on the motor, and the 3 windings on the output of the transformer.\n\nOptimum efficiency will be DELTA-DELTA-DELTA or STAR-STAR-STAR...Either way no 'ground loops' to cause loss.
229335
You can parallel the diodes to increase the current capacity of the recifier or add diodes in series to increase the voltage capacity of the rectifier.  If your looking to use diodes to drop  120v AC to 12V DC there are much easier was to do it.  The most common way would be to use a transformer to drop 120V AC to 12 - 16V AC and then use the recifier bridge to DC current.  Then place a large value capacitor in parallel with the DC output to filter the remaining pulses in the DC current.  Hope this helps!  If you have anymore questions drop me an e-mail.
864668
First, what is the input voltage and the desired output voltage?  Is the output voltage fixed, or do you need a range of adjustment (taps)?  Do you need isolation between the input and the output?  If not, an autotransformer (single winding) might be acceptable.  What is the frequency, and is it single phase, three phase Y, or three phase delta?\n\nNext, what is the power rating?  Small transformers are usually rated in output current, whereas larger transformers are rated in KVA.  This is the maximum load;  a smaller load would not be a problem.\n\nFinally, what are the mechanical factors?  Does it need to be hermetic or can it be open frame?  Do you want terminals or wire leads?  What shape and size?  What is the mounting?\n\nIt's not really that hard.  Usually you can browse through a catalog and find the transformer you need in minutes.
423967
first connect all grounds then take the  neutral on the transformer to your  receptacle neutral then  take one live wire from the receptacle to the switch and from the switch to the transformer being that it is two pole you will take a wire from each pole and take each "hot leg" wire to a separate "live" connection point on the transformer, provided that it is a two phase connection