Question

What is the difference led and led free solder?

Answer 1

solder is used to join wires etc.
led is used to solder wires and another way of soldering is led free soldering.. where any other metal(i dont knoe the metal) is use to solder..
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Answer 2

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LED :- A light-emitting diode (LED) is a semiconductor device that emits light when an electric current is passed through it. Light is produced when the particles that carry the current (known as electrons and holes) combine together within the semiconductor material.

LEAD FREE SOLDIER :- Lead-free solder requires higher soldering iron temperatures. You should also have longer dwell times as a result of the higher melting points.