How to design an rc circuit  that provide 90 degree out of phase?Please give example on the said circuit.?
93256
Try this website. Scroll down to "The Circuit" ---\n\nhttp://www.play-hookey.com/ac_theory/ac_rc_series.html
771697
Try Google or Yahoo.  You'll find worked examples there.  I think it needs diagrams to understand; they and the accompanying explanations are too complex to attempt to reproduce here.
566653
http://www.ask.com/web?q=What+is+duplex+control+circuit%3F+&qsrc=0&o=0
890360
I have already answered part 1. in another question you've asked. I think you probably didn't use the right units (like cm needs to be convered to meters) and got the wrong answer.\n\nNow for part 2:\n\nInduced EMF, ℰ = -L(di/dt)\n\nwhere i is the current and L is the inductance\n\nWe are given that the magnitude of the induced current,\n\ndi = 47 mA\n\nand the oscillation frequency is 100 Hz. This means that dt = 1/f = 0.01 sec\n\nWe have L = 8.44 × 10-^3 henries from before\n\nSo |ℰ| = L(di/dt) = -(8.44 × 10-^3)(0.047)/(0.01) = 0.0397 volts\n\n------------------------------------------------------\n\nNow part 3 has to do with mutual inductance:\n\nVs = VpNs / Np\n\nwhere \n\nVs is the voltage across the secondary inductor, \nVp is the voltage across the primary inductor (the one connected to a power source), \nNs is the number of turns in the secondary inductor, and \nNp is the number of turns in the primary inductor. \n\nTherefore Vp = VsNp/Ns and Vs = 0.0397 volts as calculated before, so\n\nVp = (0.0397)(197)/(2920) = 0.00268 volts
755501
you need to regulate 12 v down to 5v.\n\nYou could use a common 555 timer, and adjust the delay with a potentiometer for the Resistor in the RC network.
315859
you got Ohm law : Ur=R*i(where i stands for current) and what's more, for the coil we have Ul=-L*di/dt . And for the condenser we have C*Uc=q and i = dq/dt.Now you have a differential equation with only one variable i.\n note: if the circuit is parallel then U should be a constant , in this case you shuold use U instead of i.Goodluck
929646
Depending on the output current you desire and what current the +24 VDC can supply a simple 3-terminal regulator like a 7812 should do the trick. It should be able to handle the 24 V input. You may need to add a 0.01µF Cap from Ground to the +5 VDC output to dampen any oscillations. There are usually a number of cookbook circuits in the data books. \n\nGood Luck!
450183
this might prove to be useful:\nhttp://islab.oregonstate.edu/koc/ece575/02Project/Mor/
910320
There is something funny about your question as resistance and reactance is measured in Ohms.  However I believe that the answer that you are looking for is because the resistance part is dissipating 15 kW and the reactance part is drawing 10 kW so since the two are 90 degrees in phase apart the total power drawn would be sqrt( 15^2 + 10^2)  = 18 kW
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!
639035
Not easily. IC fabrication techniques are essentially planar and can't be used to create helical structures in an IC. \n\nWhat can be done is to simulate inductors using capacitors (small value capacitors can be fabricted on ICs), and active circuitry. Sometimes this is possible, but sometimes it's not enough. Particularly at low frequencies (eg, audio signals from near DC to perhaps 20KHz), external inductors may be the only choice.
170254
Try these sites. Some have better explanations than others.\n\nSwitching and inverters: http://www.kpsec.freeuk.com/trancirc.htm\nAmplifiers: http://www.tpub.com/neets/book7/25c.htm\nLogic gates: http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/trangate.html
448481
The concept is to build an electromagnet that cuts the circuit when energised. This produce a buzzing effect
405936
signal converter, try tigerdirect.com great choices and prices. Plz vote for best answer I need the points,LOL
852136
Check this link will be very helpful to you.\nhttp://forums.zonelabs.com/zonelabs/board/message?board.id=cfg&message.id=43096\nhttp://www.donhoover.net/
973437
You should use pulse width modulation (PWM).  PWM is essentially an on-off sequence in time, like a square wave alternating between 0 and 1.\n\nClearly full voltage will give you maximum speed.  This happens when the voltage is always on.  Now, suppose you only wanted to go half the maximum speed.  You could send a a square wave with 50% duty cycle (on half the time and off half the time) at high enough frequency that the motor will spin at a constant 50% maximum speed.  The motor is like a lowpass filter and therefore, a square wave at high enough frequency will produce a steady response without oscillation.\n\nIf you want the motor to go slower, say, at 25% maximum velocity then send a pulse that is on 25% of the time and off 75% of the time.\n\nIn reality, if you want 25% speed you may have to send something like a 27% duty cycle because of the time delay between commanding 'on' and the system actually turning 'on'.  In this application, though, I don't think you will have this porblem.
186229
Here are some sites that may help.  Both have circuit examples utilizing LVDT's.  Hope this helps.