Soldering The images below show cut-away views of a resistor soldered into a circuit board. The ideal joint should look like an upside down volcano.
A perfectly soldered joint
A dry joint When the wire or circuit board is dirty a dry-joint can occur. When this happens the wire may look like it is soldered in Place but there is no actual electrical connection.
Too little solder If too little solder is applied then the wire may not be held securely.
Too much solder When too much solder is Used then a large blob can Form. This can cause the tracks On the circuit board to touch Together stopping the circuit From working properly: This is called a solder bridge.
Soldering Tools These are the tools we commonly use in school.
Desoldering tool If we make a mistake and Put a component in the Wrong place, or use too much Solder then we can use a desoldering tool to “suck” melted solder off the circuit Board.
Side Cutters Also know as wire cutters.
Wire strippers Used to remove the Plastic covering of wires and cables.
Long nosed pliers They are used to position components and to pull the wires through the holes In a circuit board
Soldering iron stand When we are soldering we Must make sure that the Soldering iron is returned to The stand. This prevents Accidental burning of the Wire, table and most Importantly, you!
Solder Traditionally solder is an alloy of lead and tin. Lead is very poisonous So in school we use a different type made of Tin, silver and copper.