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DemoSatSoldering

DemoSat Training

Boulder, ColoradoDecember 7, 2002

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SolderingSoldering

Circuit BoardCircuit Board

ResistorResistor

Solder PadsSolder Pads

Side ViewSide View

Top ViewTop View

PCBPCB – printed circuit boards – printed circuit boards

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SolderingSolderingIronIron

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Move soldering iron until tip isMove soldering iron until tip istouching wire & solder padtouching wire & solder pad

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Move solder to touch edge of tip. Move solder to touch edge of tip.

SolderSolder

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Hold until solder melts Hold until solder melts on tip by wireon tip by wire

SolderSolder

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Move solder back to touch wire onlyMove solder back to touch wire only

SolderSolder

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Move solder in to form a Move solder in to form a small pocketsmall pocket

SolderSolder

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Move soldering iron tip up. ThisMove soldering iron tip up. Thiswill drag solder up with it.will drag solder up with it.

SolderSolder

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Look for Look for shinny filletsshinny fillets

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Soldering TipsSoldering Tips

1. Make sure tip is hot

2. Clean & tin tip

3. Keep tip clean by using wet sponge and cloth

4. Heat until the parts are hot enough to melt solder

5. Hold until solder flashes around pad

6. Do not put too much solder on

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Top ViewTop View

Tinned Copper TracesTinned Copper Traces

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Top ViewTop View

SolderedSoldered

Solder bridge shorting two traces - bad, bad, badSolder bridge shorting two traces - bad, bad, badBut, can be fixed by reheating or using solder suckerBut, can be fixed by reheating or using solder sucker