want  create ultra capacitor in my house to store 20V,100 Watts for 15 minutes pasting matls on roof/ceiling?
440855
Could be a real bit*h building a capacitor to store only 20 volts and produce 100 watts for 15 minutes. That's 5 Amps for 5 minutes! How are you going to charge it? A capacitor is not the ideal way to provide power to run something for any appreciable length of time. What's wrong with a battery? Take two car batteries, tie them in series. It will be about 25 volts but could run your 100 watt load for a very long time.
721867
Check with local energy company. good luck
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.
789204
Give the site below a try! Good luck.\n\n<This is for fun only. If you are actually trying to do this to heat your house or use for power, I don't think you can do that. You would need commercially made cells, but you could set up the system yourself.>
1038968
What voltage dc, or do you need to be able to vary it?  What current capacity do you need?  What ripple voltage is acceptable?
124558
Use a 12 volt lantern battery and some wires
722546
I use a power inverter.
823421
light duty is the problem - would be very easy to make one using any push on connector in the circuit ( you need a spring loaded connector with the pin being non conductive - a 'blade' shaped pin would be the easiest to rig )\n\nanother possibility is to use a switch of any type ( a - b ) that shunts the circuit to a open   circuit  ( this can be activated by a pull - and switched back manually )
227723
Regardless of what size capacitor you choose, there will be a small ripple on the output voltage, which of course gets bigger as the load increases.  You need to determine what is an acceptable ripple voltage for your load to calculate out a value.\n\nIf you want a totally smooth DC output, you'll need to first rectify and filter, then use a voltage regulator with a voltage set point that's a few volts below the voltage output from the capacitor.  Follow that by a smaller capacitor after the regulator to help catch any remaining transients and response after regulation.\n\nSomething to note:   Your capacitor's voltage rating should be much higher than the actual working voltage you will subject it to.  Eletrolytics like to blow up (literally) if you run them past their maximum rating, even for a short time.   Also remember this, the AC voltage that you measure at the output of the transformer (or the output of the rectifier, unfiltered) is the RMS voltage, not the peak voltage of the AC waveform.  Once you add the filter cap, your DC voltage will appear to be higher because the capacitor is charging to the peak voltage, which is basically the RMS voltage multiplied by 1.414   Keep this in mind as well when selecting the working voltage rating for your capacitor.
329547
If there are 3 capacitors, Ca, Cb, Cc then use the following:\n\nSeries\nTotal Capacitance = 1 / (1/Ca + 1/Cb + 1/Cc)\n\nParalel\nTotal Capacitance = Ca + Cb + Cc
69351
My "amp" has 120 watts
282019
yes, using a static capacitor
271413
what are you talking sbout - kilowatts per square of space? please clarify your question. i believe there is nothing like that
587901
get one of those electrical outlet timers that are used for turing lights on etc.. and lock it in the closet with your router, and or pc
489134
a 400 to 500 watt power supply would solve the problem
67271
your best bet is your local electrical supply house they sould have almost all your answers.
525922
Before you can answer this you need at lease to variables. You have the voltage of 1.5 vdc. You will need Amp the clock pulls. Wattage = Volts X Amps.