Recently my old soldering gun spoiled. I open the casing and try to repair, but I think the problem is the heating element, which is not repairable.
So, its time to get a new soldering tools. After some research, I bought an Antex branded 25W soldering iron, at price of RM70. Initially, I am thinking of getting a 18W or 16W Antex, but what they have there at that time is 25W, and I simply take it.
After I power it up and do some testing, I found out that the 25W is a bit over heat compare to my old soldering gun. I am a bit regret about choosing 25W, but I don’t think I can return it back because I already power it up and the colour changes of the heated tip is very obvious. So, I decide to add a dimmer to the soldering iron to make it adjustable.
To enable the adjustable power for soldering iron or soldering gun, you will need a dimmer (any home lighting dimmer will do). For me, I get an UMS 6600S Dimmer Switch from an electrical store. The wiring instruction do state that the max power supported by the dimmer is 600W, so, my 25W shouldn’t be a problem for the dimmer.
Also, you will need a box for the dimmer as a protection to the wiring. You can this kind of box (I am not sure what it is called) in a normal electrical store.
From the picture above, you can see that I do cut a small U-shape clearance for the in and out wire. I do it using a cutter, you can try to use a drill (maybe you can drill holes for in and out wire), and please be careful while doing this.
Now, proceed with the wiring according to the Wiring Instruction. Simply replace the Lamps with your soldering Iron.
The complete adjustable soldering iron.
Please leave a comment if you have any suggestions or better solution.
Does that mean we get to save on buying soldering station?
Adding a dimmer is different with soldering station. Adding a dimmer is only control how much power we supply to the soldering iron, but there is no temperature feedback from the soldering iron. No matter how much heat/power we use, the supply power is still the adjusted amount.
But a proper soldering station do have a temperature sensor, that feedback the current temperature of the soldering iron. So, when we use more heat, and the temperature drop, the soldering station will adjust the supply power to higher amount to keep temperature constant.
Does it really work?
I have a Weller WP25 soldering iron, can it become damaged if I add a dimmer?
I believe it do works, and so far my soldering iron is functioning nicely.
You right!
It really works, I have added a dimmer to my soldering iron and it works great!
thank you for your advice.
Feel good to know that my article/guide do helps in improving your soldering iron. Thanks for reading my blog!
Your old soldering gun appears to be nothing more than a Weller industrial soldering station barrel repackaged in pistol grip form. If you haven’t tossed it in the trash, I’d take a look at the possibility of getting a replacement Weller heating element. All repair parts are available for Weller soldering stations, including heating elements, and they can be completely rebuilt to as-new functionality, if not appearance.
Thanks for the suggestion, but sadly I already trash it.
@Reto — No, you cannot run your Weller WP25 with a dimmer control, unless your aim is to produce heat far below the normal operating temperature. These Weller irons are temperature regulating, and have a magnetic switch that works in conjunction with the special properties of the exchangeable tips. They rely on the “Curie effect”: The tip loses its magnetism when a certain temperature is exceeded, the magnetic switch opens, turns off the heating element and allows the tip to cool until it becomes magnetic again, the switch closes, etc. The mechanism causes the temperature to swing in a range of about 25°F. If you install the highest temperature tip available for such irons — typically 900°F — you could use a dimmer for temperatures below about 850°F, but now your iron would be unregulated, and you’d have no idea what the tip temperature is from moment to moment.
Thanks to User8192 for the informative explanation about the Weller.
Thanks much for this. I came across your website after finding WebcamViewer and using it to solve an annoying problem. I’m going to implement this soldering solution as well as your polymorph LED light and the supercapacitor USB light!
Great Stuff! Always thinking out side the electric box!
Very good idea and suggestion . Thanks for the info and pics.
Hi, I have not read all the posts but get this idea the op has made a change to adjustable soldering iron control which people are liking lol. Great. I have a failed adjustable low cost soldering iron which I would like to know can be modified by removing the adjustable part and simply splice the wires ob both ends of the adjustable electronic part to have a working soldering iron. This would be perfect for me. Someone gave me this soldering iron and will great as a temporary solution until I can afford a better soldering iron, a Hakko or summin’ thank you op.
Which soldering iron is best for beginners?
I have a soldering iron with a temperature adjustment dial already (factory) that the adjustment knob and housing box is very near the base of the soldering iron wand handle base. This dial box placement not only makes the soldering iron itself harder to maneuver or hold/use in awkward positions but it also makes the iron itself much heavier in the hand and when placing the hot end in a soldering stand. This additional weight near the back end of the handle on the cord often will pull the entire tool out of the iron stand holder if not knock the entire thing over because the stand and iron together weigh less than how much the temperature adjustment knob and box on the cord is. The only reason for placing this so close to the iron handle bottom is to make temperature adjustments as needed easier, but otherwise I wish that variable knob was near the actual male plug-end and the receptacle. The next soldering iron I purchase will be the non-variable temperature type and I will just install the dial near the plug at the opposite end of the power cord.