How to make a HAKKO T12 soldering iron Adjustable temperature only $5

This is an easy to make and low-cost T12 temperature-adjustable soldering iron. It costs about $5.
Its temperature can be adjusted between 180℃-480℃ degrees.
It heats up very quickly and can start soldering in about 8 seconds.
The power is 72W,It can use various 12-24V DC power supplies.
Such as 18650 lithium batteries, lead-acid batteries, notebook adapters and power tool batteries, etc.
To make it, you only need a T12 soldering iron tip, about $2.5.
And a mini control panel, about $2.5.
There are also some easily available materials.
And you don't need to use another soldering iron to solder it.
It is very convenient to replace the soldering iron core without power off.
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Materials and buy links：
616dev Mini Control board:
bit.ly/2VoNdKq
bit.ly/34rhM65
T12 tip:
bit.ly/3a52i9j
bit.ly/3cbjs6C
Rocker switch: bit.ly/2JFK2bw
Dc5.5 socket: bit.ly/34gMsag
12V-24V 96W DC Power Adapter:
bit.ly/2QpFxGT
bit.ly/2lF5aX6
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