Electronics > Beginners
Chinese 24v tweezer iron
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BurningTantalum:
A friend, who is slowly adding to his skills by learning some basic electronics, recently bought a cheap tweezer soldering iron. He assumed that it could be connected to a cheap psu or his Weller base, but I had to inform him that this was not the case. The lead has a 7-pin 'aviation' plug fitted, and seems to be wired as two separate irons with element and thermistor. The connection PCB inside each arm is identical to that of a cheap single 'Yihua' iron. I cannot find any PSU with this plug fitted, or any info as to what it is intended to be connected to. Of course it would be 'easy' to knock up a unit or split the lead to connect to a Yihau dual output PSU with two 4-pin plugs, but that would be my task so I haven't offered yet !
Has anyone seen a unit that is intended for this tool?
BT
Mechatrommer:
Probably this https://m.ebay.com.my/itm/GORDAK-902-ESD-SMD-Soldering-Tweezer-Repair-Rework-Station/112154060597?hash=item1a1ce72735:g:ApMAAOSwPCVX7zEb

That pin has sensor wiring i guess for close loop feedback power control, so for diy psu he will need to study more or make feedback circuit. Or simply provide limited psu/pwm supply to avoid heater coil overheat or burn up... he probably can get cheaper buying this which is i also waiting for it to arrive.. should save working bench space with the small/portable psu unit.

https://m.ebay.com.my/itm/Mini-Proffessional-Portable-YIHUA-Hot-Tweezers-Soldering-Station-For-Repairing/283507221967?hash=item420258e5cf:g:LJoAAOSwDdlc98sO

The tweezer type has 2 heater coils, so do the sensors i guess, so double the wiring should differ from normal soldering iron, ymmv,
BurningTantalum:
Thanks Mechatrommer. The 'Gordak' unit is the intended PSU for my friend's new iron, although it seems the unit comes with the tweezers, obviously, and he must have purchased only a replacement iron. You are correct- the iron has 2 elements and 2 thermocouples and is, in effect, two irons needing a dual controller.
It looks like another job for me...
Incidentally- the second link shows an iron identical to his but with a plastic style 'sleeve' added over the pivot. It includes a MPU controlled PSU, probably with SMPS and is not a bench mounted unit but seems to dangle from the mains lead.

Regards, BT.
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