
If your external electric soldering iron is rusty and unusable, why not check out this article? Let's DIY a fixed-temperature T12 together!
By creating a fixed-temperature T12, you can integrate the controller right into the handle.


PCB, Soldering



Testing

Temperature Adjustment


Close-Up Shots



Assembly


You can also set different temperatures: for soldering wires, you can adjust it to 400 degrees, while regular soldering can be set to 320 degrees.
In practical tests, using a C4 tip to solder a 4mm² wire is very smooth and much faster than using a soldering station. At home, you can just plug it into a laptop power supply, and when you're outside, you can connect it directly to a power drill battery.