From OpenCircuits
Revision as of 18:57, 3 February 2008 by (Talk)

Jump to: navigation, search
stone veneer analysers hematology texas drug rehab center yorktowne kitchen cabinets click continue yes incubus succubus miss nude illinois internal vaginal cum shot media relations quickbooks report generator omega 3 ddr 512 mb cl2 5 whom it may concerned iraq war video clip barriera letto brevi spring breaks paul stookey the wedding song lexus oem part advent child movie rare yugioh card special education laws in pa hit estat 2004 phillips 642 hacks intergalactic newborn puppy facts bellisimo mijos campbellsville university crye blaster elite fi pro sound x account auto chase finance practice sol test for world history reaching physicians foto di piedi sexy true funny news story ancient aztec god symbol wall street bali nine estate maryland real state tax affiliate business internet program starting disneys alice in wonderland photo of shirley caesar truban coat stadium disc edition poseidon special two sbarbaro bronson hospital list missouri offender sex state family guy episode list rashguard shirt canola filtro solar economy tractor mt everest death partition magic v8.05 marine accessory dirt racing porno pic sette anni di guai v for vendetta official site railway job vacancies tema gay asia girl hip hop video albergo fabriano colorado land sale magic the gathering shop car park doggers en gun rose video vivo cigarette coupon marlboro sept 16 2006 britneys fairy tattoo metroid prime 2 echoes green leaf mulberry tea thai comics jab motels titusville audi repair dallas la mega radio colombia impianti hi fi lost ship recording il gabbiano infelice malteam kalispell montana freq throwing bottle art art book cd clip dover electronic form from haeckels nature rom la dolce vita del soldato joe 69 dodge charger my sister in a bikini warweb www big fun it seguridad social billy sunday real state aladdin movie quote art edition fourth world battiato non cd musicali central vacuum systems into the woods soundtrack uk reverse phone directory michell vieth fotos austin florists same day amba video asus k8n e deluxe department store hechts planned parenthood canada toronto cat5 cables national basketball association history marvel sprites akira movie download sinto dvd traduci california di the o c pesci virtuali custom made gowns identify ati video card meadowdale high school wa static x push it sarver pennsylvania punch down tool blades televisori al plasma da 42 panasonic bare feet sex sydney opera house opened guacamole recipes 2 bubble post trouble hard disk esterno notebook win xp freezes on startup jack 2 5 cuffie auricolari paramount kings dominion virginia salsa celtica neighboring countries ryobi battery dugong journal of the american dietetic association stravinsky firebird horizon foods tennis top tenda esterno convertitore mp3 download free sims 2 meshes art contemporary montreal museum water softener part secret agent man il sergente di fuoco free number phone reverse search cartman singing cabin ruidoso seiko dive watch spanish to english translator independent stave co tomtom mobile 9300 eurofiction dounloads videos de luisana lopilato xxx cover it instant garage east carolina university homecoming the mark of zorro by johnston mcculley agp driver video climbing normal range blood sugar levels the wellington hotel ny labairlines free online jigsaw puzzle shrimp scampi recipe miss congeniality 2 armed and fabulous miniature model marie soleil michon photos sports and hobby crafts taking it all softball injury caroline cleavage rhea advance boy game game sp system video celtic ireland ring wedding female give orgasm tip cruise discount to hawaii vacation automatically child diagramming sentence jjj thumbs sm 913n teenage violence articles lane furniture store amanita design nec laura non c e meera jasmin pal zileri saliva unleashed income tax table texas free ware gif animation software olympia lodge winter park millionaire show tv aera unusual baby names robi wiliams albany georgia movie theater exam female physical video golf images electric fireplace log advertisement nike ronaldinho video vulgate latin bible motorcycle helmet gender selection suppliments jeremy hotz 4runner cover seat toyota car loan chapter 13 bankruptcy agathon leonard html music video code phs forms redhead skinny teen house of morecock pulse smart discount contact lens asus double xph joy enriquez tell me how you feel spirulina health benefit real estate roosevelt utah apopka house values asheboro movie theater social work masters degree program embroidered jeans international shipping company california state bar association iron glass dining table knock in eagle video cam moosejaw sask epson aculaser c900 roberto alagna earthworm lesson plan design cd jobs at del laboratory inc longwood events boston primary color crib bedding torino euro motel in bed with faith free movie 47 tucana wire transfer origination appliqued quilt lemon story photography jobs rimini centro di moda lalit kala academy in delhi juwel vision 180 curved aquarium nissan pathfinder part free ware cad program knoll textile thinker camp shelby ms apollo video rentals joker card upstairs club johannesburg joyeux movie noel mold sampling lavinia www es barbie com grape lg 4400 cell phone case ali big gipp video noosa holiday accommodation lisas floral mini storage business design nautical star tattoo women latex catsuit accomplishments of albert einstein picture of japan map mechwarrior 3 pirate moon rei ayanami female tattoo feet royal touch software palmari kelly lisa robin abit ag8-3rd glenn beck leasing institute of internal auditor monster traxxas truck kelis ps2 walkthroughs wearing pullups injury lawyers norfolk video gratis hard extreme movies 4 us download porn finanziamento lucca buy plastic intervideo dvd copy 2 platinum plus gaudino da costa josh groban lyrics european glory hole movie history of the moor scrivere un curriculum je taime moi non plus norelco shaver sex turn ons inc monster movie mothers day plants download anime video for free the ring 2 trailers austin bio kincaid allison white movies super mini bikes dvd da auto brooke burke video cote dazur hotel tv lcd dvd combo nokia theme editor shuffleboard supplies female model pics super sculpey price lamb of god laid to rest lyric billiard stocking thumbs wrestling store wonder lake il zip code pic of hilary duff in a bikini see clearly method easy jigsaw puzzles online legal process server jama eliza dusku install hard wood floor austria hungary 1914 population xg vigor 500w norfolk state university football vascetomy northwest montana when the president talks to god apartment lenders lady sovereign volvo transmissions north west las vegas homes inflation rates us va loans legal contracts 20 helen levitt female muscle fantasy art free business card template rick donovan photo progressive profits barbara crampton fashion school show animations graphics norton abrasives a newfoundland dog jesse james west coast choppers livestock breed buy corset start an online store sport cooling product attorney general greg abbott winnie the pooh rumbly tumbly severe and profound disabilities free mp3 salsa kill bill soundtrack belize country katie holmes breasts tommi makinen evo painting tip paneling ring power pack 135 fiona apple video codes wadere 1.046 young hairless pussies sherborne inn massachusetts kiely williams bio prefrontal area of the brain jordan school district car rental gaeta italy usedcars 12oz forums alg.exe process plush snowman wholesale cake chocolate leches recipe tres german hats 17 50 tamron coast east fishing florida report anna song rock n gem show model chrissy taylor enable australian miniature picture shepherd fifa 2006 thong wedge chenoweth kidney ureters sailboat classified food list vitamin marie kerry osco drug stores michelle paige peterson save toby japan scat girls lemont and illinois and chamber of commerce nike air max corporate art louisville lincoln middle school pullman holly marie combs gallery runescape money editor good samaritan law ancient greek menu czech babes extreme hardcore sex gallery naked fucking teachers rx waterstop john music whoopee marther luther king biography nascar races road map in jo sung wallpaper poem for newborns monique st pierre times union newspaper of warsaw indiana bull raging nokia cell phone battery model bmc evanescence amylee new dress up games online adele stephens uncensored majnu songs legal form software henderson nv homes for sale restroom flooring chillun god got welded wings max adapters forum nikkala stott 2000 cherokee grand jeep picture almost peed arizona pet rescue wholesale spy equipment all that uk debt consolidation reggae do maneiro steriogram walkie talkie man lyric phi beta sigma lightweight strollers samus aran without armor nawal al zoghbi picture liz lind corny pick up lines wooden gazebo plan burning bright lyric surname origin search business intelligence advisor twistys clips of the day state employee salary free cartoon hentai galleries aibo friend service one federal credit union muskegon ipc inter process communication cruzan rum hunt for red october gamma globulin west virginia employment agency cute skater boy makati hotels common cold honda engine swaps emb-120 brasilia for sale happy hour polylysin en vitro ferrari f430 wom dead deer pubescent boys kugelberg welander disease gauntlet precision sheet metal arizona link up properties nationwide hat kid safari different part of the brain whole again lyrics play make a crossword puzzle online for free azo standard pass drug test enjoy the silence lyric my name is nobody mp3 gas flow meters modeling and simulation software golf instructors properties to rent in london olsen sex nude where to sell gold coin id lanyards dysmenorrhea harbor carpet mills opposition to social security reform venison chili recipe colorado properties remax springs personals ny instrumental music custom bike parts mahfouz laser riverpalms curve fitness and weight loss center swinger couple with photo labia enlarging intuition 2 space swing dance songs mulberry bush child clothing cubicle gallery magazine girl next door canada black bear hunting florida non-compete prevost buses for sale management business endnote 8.01 twain awful german language realty park rapids leonardo da vinci biography diggity dog figurine hot 3m angler scientific benefit of interest only loan websuche idaho bail bonds womens liberation movement in 1960s le loup la biche et le chevalier translation 18 casino gaming guidelines online online review crime library true long march map gambler web sites pedosex world of warcraft music video coat rica travel casino gambling new online poverty in uk chevelle clincher sham yankee medical artwork candle richly scented wholesale nutrition information poison oak fact mary mary mda accessory nevada homes sale russian christian book 2006 carnival uruguayo unlimited bandwidth cheap hosting amnda bynes anna akhmatova biography student parent handbook south park animation 3 banjo date kazooie release philips hid kit alan jackson tickets nissan skyline spare parts rcommend whitts order adipex cod cinderellas castle pooh-pooh floor easel pussy teaser yahoo klondike solitaire online rental jiz movies avatar help neopets site 2529ea local phone service in new york watch hindi music video accessory betty boop handbag womens yamaha vino scooter cordless phone alarm clock spg co backstreet boy music card note thank ebola origin virus new toyota fj land cruiser operating room shoes raybestos rookie of the year rusty wallace behind hardy laurel magic movie turntablism eye health natural retina proclamation of 1773 enlisted national guard association equipment find home medical supply example model multiple regression nightmare before xmas lyrics henna tattooing wouldyouhitthis caravane debaser pixies adult amoxil dosage carlton bates english to chinese dictionary scba racks fedish 1980 andi watson guitar call center outbound services philippine dating service offshore company formation 1944 virginia wahoo desi lund picture reina leone psychotherapy videos adia sarah meaning abbotsford minor hockey association nitix pe tax attorney native law centre saskatchewan




You can think of a capacitor as sort of a rechargeable battery, connect it to a voltage and a current will flow into it charging it up, later it will have a voltage of its own that can push the current back out. The key equation for a capacitor is:



  • C = capacitance ( units: farad = volts /coulomb )
  • V = voltage ( unit: volts )
  • Q = charge in the capacitor ( unit: coulomb )

A simple application of the formula above occurs when a constant or near constant current flow into a capacitor: then the voltage across it increases at a constant rate, the graph of the voltage against time will be a line rising ( or falling for a negative current ) from the left to the right. If the current is constant the line is straight.

Another way of thinking of a capacitor ( which is only partly correct ) is that it is a resistor with infinite resistance for DC and lower and lower resistance as the frequency goes up. This is a fair model for sinusoidal voltages and currents, but is less useful for signals such as square waves.


  • ac coupling –- blocking -- isolation
  • timing
  • Time for a capacitor to charge or discharge is very roughly RC where R is the resistor in series with the capacitor.
  • Filter ( often power supply filter )
  • decoupling
  • tuned circuits

All capacitors are formed by having 2 conductors ( or plates ) connected to the two terminals of the capacitor. The conductors are separated from each other by insulator, typically very thin. Adding charge to one side forces like charge off the opposite plate because like charges repel. The larger the plates and the closer together they are the less voltage it takes to force in the charge. If the insulator ( called the dielectric ) is too thin it will be pierced by the charge and the capacitors becomes a conductor. Typically the basic specifications for a capacitors are its capacitance and the maximum voltage that can be used without causing the dialectic to break down.
There are many diferent technologies for manufacturing capacitor each with its own advantages and disadvantages.

External Links

  1. Capacitor From Wikipedia, the free encyclopedia
  2. RC circuit From Wikipedia, the free encyclopedia
  3. RC Timers and Timing Circuits
  4. Decoupling capacitor From Wikipedia, the free encyclopedia
  5. Components: Capacitors


In electrolytic capacitors the insulating layer is formed by electro chemical action between the plates and other chemicals in the capacitor. This forms a very thin layer which allows large capacitance in a small package. Typically this works for one polarity and not another so electrolytic capacitors are marked with their polarity. There are some non-polarized electrolytics, but they are not common.

Some electrolytic capacitors manufactured between 1999 until today are made with bad electrolyte. Avoid these, see capacitor plague for more info.





Polyester (Mylar)











"Ferrites? I don't know much about 'em, I only use ferrites in switching regulators." --National Semiconductor's Bob Pease

Can be replaced in many circumstances with an impedance inverter using only an opamp, a capacitor, and a few resistors.


List of standard 1% resistors. If you want 1% resistors, you must pick from this list or you will pay a fortune for the resistor, assuming you can ever get it. Interpret these numbers as the "mantissa" of the value. You can multiply the value by anything from 0.01 to about 100,000.

100 102 105 107 110 113 115 118 121 124 127 130 133 137 140 143 147 150 154 158 162 165 169 174 178 182 187 191 196 200 205 210 215 221 226 232 237 243 249 255 261 267 274 280 287 294 301 309 316 324 332 340 348 357 365 374 383 392 402 412 422 432 442 453 464 475 487 499 511 523 536 549 562 576 590 604 619 634 649 665 681 698 715 732 750 768 787 806 825 845 866 887 909 931 953 976

External Links:

  1. Components: Resistors


Metal Film





Personal tools