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Home Soldering

Home Soldering. Georgia Institute of Technology. Materials - Soldering Irons – Conventional. Temperature Controlled M o re expensive but not unaffordable Power controlled Watt rating 15W about right for small electronics – even a bit hot in some cases Some are switchable

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Home Soldering

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  1. Home Soldering Georgia Institute of Technology

  2. Materials - Soldering Irons – Conventional • Temperature Controlled • More expensive but not unaffordable • Power controlled • Watt rating • 15W about right for small electronics – even a bit hot in some cases • Some are switchable • Battery Powered • Allegedly about 15W effectively • Portable, no cord, light • Heat conductive tip lowers risk of burns

  3. Materials – Soldering Irons (cont.) • Cold Heat • Activated when low resistance on the tip • Very heat conductive material on the tip – runs small current until connection, then higher current • Electrical resistance of solder and tip causes heat • Different technique • Battery powered • Only hot when soldering or immediately after • Not good for desoldering • Fragile

  4. Materials – Solder – Kinds of Solder • Cores • Flux • Improves flow • Prevents Corrosion • Can form salt – “no clean” • Types • Acid • Metalworking • Can have poisonous vapors • Rosin • Common • Electronics • Water-Soluble • Environmentally responsible • Can be corrosive • Removal • More active, more salt • Easier to remove • Flux-free • Rare – mostly research, manufacturing

  5. Kinds of Solder (cont.) • Lead • Slower solidifying • Lowers melting temperature • Reliability • Poisonous • RoHS • Size • Chemical ratio • Unspecified and 60/40 or 63/37 -> likely tin / lead • Otherwise, typically not specified or materials namedbecause many other combinations exist

  6. Materials –Accessories • Grips • Soldering involves attaching two metal parts together – so there will always be 4 parts involved: • Object A • Object B • Solder • Soldering iron • Solution: stabilize at least 2 of them (or 3?) • Pliers • Chip Clips • Vice Grip • “Helping Hands”

  7. Accessories (cont.) • Surface • Sponge • Mousepad • Heat Sink / Clip • Stands • Extension cord (!) • Note: low wattage • Tips • Size/Shape • Wattage • Connection

  8. Concepts • Tinning the iron • When first using the iron or when coating is wearing off • Protects the tip from corrosion • Better heat flow • Too Much Heat • Melt the solder • May need to prepare surfaces • Result not as solid, but often good enough • Accessories • Tips • Lower Power • Electrostatic discharge • Everyone seen anti-static bags? Static + electronics = bad • Try to avoid generating it (no wool socks, etc) • Anti-static wrist straps • Don’t touch the iron! • Many irons are already grounded

  9. You can do it! • The end

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