Soldering

soldered LED
Connecting copper tape (by soldering)
A way to connect components in the circuit is by soldering.  Here we connect two pieces of metal by melting a third metal into the joint as a “conductive glue.”

To solder a connection, you will need the following materials:

soldering materials

hold soldering iron
Start by holding the soldering iron as shown in the picture above.  On some irons, you can keep track of the temperature with the display on the machine.

First,  tape one copper piece over the other piece normally (no need to fold the tip back).

soldering copper tape connection
Melt a puddle of solder onto both pieces of tape and merge the puddles together.  This makes a very strong connection by effectively merging the two pieces of copper into one metal.

Adding the LED (by soldering)
melting solder
Start out by melting a puddle of solder on one end of the copper tape.

adding led
Then, use the tweezer to place the LED while melting the puddle of solder with the soldering iron onto one side of the LED. Remember to orient the LED so that the +/- ends of the LED are connected to the +/- terminal of the battery.

soldering other side of LED
Repeat the process of melting the solder to connect the other end of the LED.

Finally, this is what a soldered LED connection looks like:
soldered led

Tips:

  • Use the side of the soldering iron rather than the tip, as this gives a greater surface area to heat the copper tape and solder.

 

How to solder an LED?

Debugging: How to desolder an LED?
To remove a soldered LED, alternate heating either side of the LED while lightly pulling the LED up with a tweezer. Here is a video on how to desolder an LED:

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