Basic soldering

From OpenCircuits
Revision as of 21:59, 16 October 2007 by 122.214.180.254 (talk)
Jump to navigation Jump to search

chicnaacel fotos de daniel agostini cartina geografica dell umbria rubinetteria cinese jvc everio gz mg20 telefonini siemens occasione lg l1100 curia www teans com tv sony lcd 32 per amore di cesarina aziende meccaniche toscana la fessura siti sesso gratuiti cento ragazze provveditorato studi ancona inno sardo batteria nokia 8210 mobile casa www porca madonna net millon de amigos logitech cordless desktop lx500 memory stick adattatore scanner a3 mustek scanexpress english aljazeera net dvd recorder 2 sintonizzatori diana zubiri pics jaguar s type 30 quina ouenza djebel planeta moldova mp3 decoder surround we wish you a merry christmas parishotel mustek gruppo ups powermust 800 king lion cani piccola taglia by haiducii incredibile romantica vasco rossi como me duele uniba it dvd portatile lcd daewoo apple laserwriter 16 600 ps i net mc jeffsky scotty doesn t know moteur de recherche ricetrasmettitori alan reati di pericolo vincenzo e laura magnifico delirio strumenti e apparecchi dj il merda iraq decapitazione simpson norman frederick www immagini delfini it parasite eve 2 palavras ao vento lavoro nel secondo dopoguerra what about us divani antichi prestige frigoriferi smeg trova lavoro svizzera senza famiglia 35mm hotel princess gichi sexy hamlet tv sapore di sale www meteo fr birthday greeting cards km0 diesel auto km 0 www big brother com el poder del amor nexstar milano hillary duff coming clean batteria lg batterie per telefonia gianburrasca hard disk 2 comme s fa publiche relazioni lavelli cucina rottamazione computer usato tps codes new incontri a roma lettore mp3 512mb philips night shot videocamere sony mdr e931lp lettori mp3 packard bell audiokey fm eminem video prova scritta di italiano una donna da guardare rurouni kenshin papa don t preach guarnitura lucio sessa porno star com computer napoli merry keylogger comere telesio libri albergo agrigento finalcount goce inni e cori milanisti daniele winits parietti nuda brevetto di pilota di aerei di linea gd87 cellulari netgear fvs318 samsung frigo toyota avensis 16i 16v sol sanyo plvz3 prendi una matita mina gioco spongebob t shirt uomo cavalli hard disk ide 400 gb cresus jordan lee nuda pilates aristogatti libri elby clone cd www drg it tabliers adultes nerovision dvd ombre ammonitrici bie engineering sas sanremo rock quick time 4 download evolution wwe theme canzoni fascisti gif animate dragon ball volkswagen touareg 25 r5 tdi vhs player sony pd170p foto porno estremo gratis un milione di game boy advance in america shadow of the colossus in un nuovo trailer lcd 26 1366 x 768 moond fratelli italia hohenfriedberger presa calcio 2006 bebe borse illuminazione esterni lampioni reversible errors falsa accusa gat brasilera nuova alfa 147 2 serie hp jornada 560 berger hynde cosa regalo lacie mobile 80 firewire ditta umbria tappi srl hyundai imagequest l90d nokia auricolare quadrophenia teco calderon testo the lemon tree fax modem immagini e artwork di copertina per killer 7 antenna direzionale driver modem usb motorola madri troie corri topolino garmin piccolo mulan distributori marantz il santo padre canta tesine pronte you touch termoforo a sabbia foto su marissa ippolito nino vaio vgn s4m garmin italia elettrostimolatori elettrostimolatore www mercedes benz com opel astra 1 7 dti evanescense un ange lhote henri nikon enel2 funeral party alessandro colnago ml 270 mercedes ivana borgia manamana screen sever cinque samurai hotel san giorgio portofino www nero express 6 it facolta di lettere e filosofia palermo under da influence dr zues mature puttane cristina grillo sesso tra uomini bari tesi scaricare ulla video jojo san salvador == Basic Soldering == Required tools: Hot metal object (preferably with an insulating handle like in a soldering iron) Solder (preferably with rosin flux core)

Technique: Apply hot metal object to both surfaces that are to be soldered together. Feed the flux-core solder into the joint from the side opposite the h.m.o. Once enough solder has flowed, remove heat.

Preferred tools: A temperature-controlled soldering iron/station. Please be aware that many cheap soldering stations and irons, even if they are adjustable, simply adjust the overall wattage feeding into the tip. This usually means the tip will still get just as hot at the lowest setting as at the highest, it just takes longer. Temperature control requires feedback which means a more expensive iron. Still, if you shop around, you can find lower-end temp-controlled irons for US$50-$60. The recommended temperature is around 380F for 63-37 (tin-lead ratio). This should be enough to completely liquify the solder without vaporizing the rosin flux. A too-hot tip will generate a sizeable white puff of vaporized rosin smoke when solder is touched to it. You want the rosin to flow onto the joint surfaces to clean them in preparation for melding with the solder, not in the air around the joint. Thin (fine-pitch) rosin-core solder. Thinner solder melts more easily and allows more control over the joint formation than thicker solder. Also note that you do not want to use plumbing solder or flux on electrical circuits as the flux in these solders are much more corrosive than rosin and will eat away the metal traces on your board.


Advanced Soldering

The "Packaging information" thread has a few tips for soldering surface-mount (SMT) components: SOIC (1.27mm/50 mil pitch), SSOP (0.65mm pitch), TQFP (0.50mm-0.80mm pitch), and MLF/QFN (0.50mm pitch).

Desoldering

Solder suckers can be hand-held, pump-driven, and with or without active heating. The basic idea is to heat the joint so the solder goes liquid, then apply suction to get the molten solder out of the joint. The hand-held variety requires you to depress a spring-loaded plunger which fires when a button is pressed to create the suction. The pump-driven variety is usually found on expensive soldering stations. Some of these incorporate heated tips so that the melting and suction is done by a single device rather than two seperate ones.

Solder braid is a rosin-loaded copper braid that is pressed onto a joint and heated so that the liquified solder flows into the braid. Once impregnated with solder, the tip portion of the braid is useless and must be cut off. Solder braid is quite prone to going "stale" and braid obtained from surplus sites is likely to not work very well.

Other methods involve using a hotplate, a hot air gun, or a combination of the two in order to bring the solder just up to its melting point then plucking the chips out with tweezers.

Links

Electronix Express Soldering Tips

Instructional Soldering Videos from NASA

InlandCraft Tip Failure Article

Geofex.com How-To Solder