Basic soldering

From OpenCircuits
Revision as of 16:26, 12 November 2007 by 212.76.64.6 (talk)
Jump to navigation Jump to search

award medal mmf to midi laundromat or full or service all killer panty video nec ir code order levitra kyocera ringtones whole life health information technology trends super smash bros melee movies aol technical help phone number air bag car lincoln town send free uk text messages late night shopping melbourne free t-mobile ringtones make tattoo guns america california flag great six reflective safety materials www caledonian com advertising strategies of state bank of india atlantic city best western arrested for counterfeiting atlas business solutions inc. native american reservations poverty toms moms oasis live in i can give it to you but what playstation 2 modchip forum order pharmacy online sun games sports illustraded swimsuits teenage girls with red hair torrent window 2000 pro caller ringtones atv accessaries ju on movie pictures newspaper name list pictures from movie the mummy the clash quotes address return label play life online no one to depend on lyrics if i was a carpenter song mobile shower trailer one piece flow 4wd used cars anti sway control office max printer london pub menus northwestern university in evanston il essential computer part african tribal music history workforce readiness kansas city ks attraction orange county ny health department older lad rec room battles top ten mortgage company tony gonzalez bio muslim book of worship and watch me go ipod commercial lyrics chansons prorated rent buy diazepam virginia ford dealerships salt lake city telephone residential real estate attorneys thyroid and symptoms to look out for norvasc online address return label auto gps review system sofia vergar jackson county school district arkansas photo shop action cartoon low fat bread machine recipe the song let the good times roll ortho win xp sp2 activation nick rivers cd last chance shoes brooklyn lcd displays mac technology worksheet motorola ringtone pc game and computer world in job mount nc rocky light my fire midi file side by side fridge law center for families location new rochester wedding york with out you im nothing police dog training manual play dnd alabama athens hotel natural huge plump kentucky lake fishing reports 1 game heat piston indianpolis star alphabet download font graffiti justin foxx mobile phones air filter adipex massage new jersey telephone numbers order tramadol repair pc cruise deal jewelry stores cd interest rate thyroid cancer bellsouth tenuate drugs for erectile dysfunction bridal lingerie boston college cheap flight to america amd 64 computers nikon camera vacation homes hawaii air travel buy used car georgia single princess cruise line acura part t mobile razor cell phone discount hotel paris free t mobile ringtones breast enlargement pills tool chicago sex cam chat british airway flight armstrong flooring one cup coffee pods gucci watch mountain bike shower curtain rings novelties police voip provider black jack game birthday invitation bathroom designs business loans microsoft word gazebos ford recalls wells fargo mortgage refinancing a free dating service nasonex trend micro chevy truck parts porsche parts online first national bank kansas city mortgage payments calculator married dating sites rolex watch for sale single women seeking men cellphone internet auction wav to mp3 conversion debt relief fallen shoes stanford university mitsubishi lancer disney vacations paintball guns online chat att wireless prepaid display boxes adult costume us airways discounted seven jeans shower panels geometry help serotonin virgin airlines phone psychic ski poles headset free t mobile phone wholesale jewelry medical alert bracelet lg ringtones crocs beauty breitling replica used motor home refinance mortgage refinance acapulco monster penis medical transcription diarrhea play roulette online lotus elise continental airlines cell free phone prepaid ringtone t shirts passport services volvo truck for sale == 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