DIY 12 Volt Soldering Iron - Homemade

In this DIY, we are going to make a “12V Soldering iron”. A “soldering iron” is a hand apparatus that provides heat to melt the solder as it can flow into the joint between two workpieces. This process is called “Soldering”.

A “soldering iron” is made out of a heated metal tip and a handle. We can heat the metal tip by passing an “electric flow”. The electricity can be provided through “battery cables” or “electrical lines” through a resistive heating component. This is one of the easiest tutorials available on the internet for making a 12V soldering iron.

Hardware Components

The following components are required to make 12V Soldering Iron

S.no	Components	Value	Qty
1.	Wood Piece	-	1
2.	Copper wire	8mm	1
3.	Heat Resistant	-	1
4.	Nichrome wire	32awg	1
5..	Copper wire	1mm	1
6.	Switch	-	1
7.	Battery Clip with wire	-	1
8.	Battery / Transformer	12V	1
9.	LED Light (Optional)	12V	1

Circuit Construction

Step# 01

First, make the tip by rubbing 8mm Copper wire.

Step# 02

Then take a wood piece and make a 4mm hole with a drill machine.

Step# 03

Cover the 8mm copper wire with heat resistance.

Step# 04

Join the 8mm copper wire with a wooden piece.

Step# 05

Use 35cm 32awg nichrome wire and wrap the nichrome wire on the 8mm copper wire.

Step# 06

Wrap the 1mm copper wire at the upper and lower part of the 8mm copper wire. 

Step# 07

Join the ON/OFF Switch by connecting it to the lower 1mm copper wire.

Step# 08

Connect the red battery clip with wire to the ON/OFF Switch.

Step# 09

Then connect the black battery clip with wire to the upper 1mm copper wire.

Step# 10

Now join all wires to the wood piece with tape.

Step# 11

Connect the 12V battery with the soldering iron.

Step# 12

Finally, we can test the soldering iron.

Step# 13

You can also use LED lights for indication.

Step# 14

You can also use the 12V transformer instead of a battery.

Working Explanation

Under this heading, we will discuss how the circuit of the “12V soldering iron” works. In this circuit, the main components are 8mm Copper wire, a wood piece, and a transformer. 8mm copper wire works as a metal tip, a wooden piece works as an insulated handle and a 12V transformer provides an electrical connection. We have also used heat-resistant, nichrome wire, and 1mm copper wire for better results. We can also add an “on/off switch” and a “12V LED light” for indicating whether the soldering iron is in operating condition or not.

Applications and Uses

Soldering irons are used to solder electronics components 

• To install chips like ICs, resistors, capacitors, etc. on the circuit board.
• To repair or change IC or any other electronic components on electronic circuits.