How do I install a capacitor with or without a resistor to prevent a SPST switch from arcing?
470470
I'd like to know exactly what you're trying to do. Using the wrong type of capacitor or one with the wrong values could explode and burn. I'm talking about a pretty violent explosion at 110 VAC!  A Snubber will not work because that is now what they are for. A snubber is used on the gate of SCRs to prevent false retriggering especially on high power circuits. What you need is a Thermistor. This is a flat round device with two wires coming out of the edge. The thermistor will be put in series between the power switch and the capacitor. At normal room temperatures the thermistor might have about 50 Ohms of resistance. When it warms up, (almost instantly), the resistance drops to about zero. This action limits and controls the initial power surge into the capacitor when the switch is thrown thereby preventing damage to the switch. You need to know the voltage and current load to select the right thermistor otherwise it becomes smoke.\n\nPlese use caution: Capacitors can store huge amounts of power and will COMPLETELY DISCHARGE IMMEDIATELY.\n\nA large capacitor, when shorted out, can blow a 1/4 inch screwdriver in half! Sounds cool but the missing part is burning molten metal flying at you! Please be Careful!
1075481
Hotwire around it in the circuit.  Cut the lead feeding into the filter after the jumper.\nJust like bypassing a sensor in a burglar alarm system.
1063180
first...identify the power source (AC or DC)\nthen...isolate the power source (lockout)\nnext...verify the circuit is not live (test)\n\nfinally...if it is AC three phase reverse any two of the three motor leads, if it is DC just reverse the two leads (if shouldn't be DC)\n\nif it is a european piece of equipment the wires should be black-black-brown, swap the blacks\n\notherwise, it should be brown-orange-yellow or black-red-white\n\nDO NOT ATTEMPT IF YOU ARE NOT QUALIFIED\n\ngood luck
943748
use voltage dividers with a transistorized switch.  this method lights  a number of lights matching the input voltage in this case, all the way up the tree to it, rather than just one, so note that.  (7V in gives 7 lamps on).\n\nthe first transistor comes on if the base reaches .7V (2N2222 or so will work).  the next transistor is attached to the base of the first transistor through a voltage divider, the third ....  From the collector stick in a 1V Zener for regulation (make sure you get one that withstands 12v in), and the lights then go from there straight to ground (include a resistor here to limit current, try 15 ohms to start, experiment!).\n\ndecide how many lights you want, divide your final voltage by that number, and that is the voltage per step (here, 1V).  the voltage divider then comes from the voltage per step versus the transistor base ON voltage, across a good sized resistor (say 470 ohms or 1k, whatever you want (watch the current and the power drain here).  in your case, if you use a 470 load resistor on the voltage divider, then the second leg of the divider is (470 / (1V/1V-.7V)) = 141 is about a 130 (less is more on the base!).\n\nrecap:\n\nso the voltage divider goes from the input into the 130, into both the base and the 470, the 470 goes to ground.  the emitter can tie to the input voltage, the collector goes to a 1V Zener, to a 1V lamp, a small resistor, and ground.\n\nthe other stages stack right onto this.  the input still goes to the 130, then to the base and the 470, the 470 ties to the base of the previous stage.  the emitter again goes to the input voltage, and the collector goes to a 1V Zener, a 1V lamp, and a small resistor to ground.  sorry, i can't attach a picture here.
143587
Here is something that may or may not help\n\nIf you take a largish non polarized capacitor\n≥45µF\nand you apply AC 120V 60Hz to one side of it\nwith no ground reference! \nyou can then place \na small wattage low voltage lamp across the \ncapacitor terminals and it will light.\n\nThis is a way to send power over a single conductor.\nI have done this.\nI think it would also work with a coil instead of a cap.\n\nAs far as I can tell\nTesla wanted to use this principle to \npower the Earth\nusing the earth as the single conductor.\n\ndo you mean generate electric power at the other site?\ndo you mean energize an electric generator?\nmaybe for a very focussed wave and relatively small distance or a tiny amount of power.\nBut that is sort of why we use wires so much!\n\ndon't RFID cards transduce a wave and send it back\nI mean technically that is an example right?
935132
keep it far from electrodomestics\n\n:> peace\n.
1113471
There has to be a power switch. Otherwise use your fusebox.
1174183
my advice is not to fiddle with the inside of that box... if you touch the capacitor, it will likely kill you... just buy a new one... when i got a replacement, it ran me $50..
882906
Well depends on the max load the circuit can handle. If the circuit can sustain a max load of lets say 10 volts and you push 15 to it, the circuit elements will heat up and fry. Of those elements will include inductors, transformers (up and down) logic controllers, resistors, transistors, capacitors, motors, and a multitude of other components. Lets say computer for example, you would fry the CPU and possibly damage all the attached components! Either way it's a bad situation.\n\nJust increasing the the resistance values of the resistors will not prevent damage. The designing of circuit boards isn't a fly by night type of thing. In some cases you can get seriously hurt or waste alot of money so exercise caution. Good luck.
103176
You might ask another student or the teacher for help.\n\nThe specifics of making a convertor depend on exactly what she bought.\n\nLet's assume she bought 4 diodes and a capacitor.\n\nShe can use the diagram below to hook up her diodes (see link) and then simply add the capacitor across the output of the diodes, being sure to keep the plus and minus attached to the proper corner of the diode "square" arrangement.\n\nBest of Luck!
1178857
Did it ever have a high temperature of heat? (The normal Temp is around 50 up to 53). If yes, Aopen as i experienced it, always get capacitors defection when it get heated,so try to replace capacitors. take care that Mp may went failure So check it. and dont expose it to more heat.
495292
Sounds like you might have a static charge problem.  Do you have something you could use as a grounding strip?
913471
In a purely resistive circuit, the power factor (PF) is 1 and you *can't* adjust it.\n\nAnd, since this is the 3'rd time you've asked the question and gotten the same answer from one other person and myself, do you even know what 'Power Factor' *is*?\n\n\nDoug
797986
This is a very simple circuit.\nhttp://www.rason.org/Projects/fmkeyer/fmkeyer.htm
464475
Don't try this one yourself! Use a pet rat or something!\n...\nActually, don't! Or i'll get hunted by Animal Rights Activists!!\n\nAll you need is a battery, two wires and a large capacitor.\nCharge the capacitor by connecting the battery across it with the two wires.\nThen disconnect the wires.\nThe capacitor has now been charged - if you put your hands across the terminals, you'll get a nasty shock.
953043
Hi. Sounds like you puffed the LED. Most need a resistor to limit current.
532709
the minimum current needed to cause the thyristor to latch/switch state