Yes folks, you too can make your own Cold Heat soldering iron!

Why spend $19.95 of your own hard earned money when you can make your own from the junk you have laying around. As a bonus, the unit you make will most likely be far more powerful than the commercially produced toy and much cheaper to maintain.

This tool works fine on some applications. (For example, welding 2 small wires together, doing an “emergency” repair or just as flashlight) I’m really dissapointed with this thing.

Please be aware: The tip have enough voltaje (more than 4 volts) and enough current to damage some parts, so do not use it to fix circuit boards that contains integrated circuits, specially CMOS and microcontrollers or microprocessors.

The tip, is a material called “Athalite”, but I think that is just two-pieces of carbon and it is called “Athalite” just to make lots of money.

The “circuit detector” turn on the Red led when the current is going thru the tip. Someday, I will make a “Homemade Cold Heat” tool and I will post the steps to build your own one.

Anyway, Once all screws are removed, you can see the circuit detector and the tip.

The IC is labeled as: HK324. I have no idea about the pinout of this circuit, but I think is just a dual Op-Amp/comparator. The tip is connected to the batteries in series with the switch

Well, that’s almost right. Actually, it’s a quad Op-Amp, same as a LM324. One of the cheapest integrated circuits ever, I think – the SMD version costs only a few cents if bought in bulk quantities.

Hi, I am happy with this product but the tip of my device had got broken, would you be kind to let me know where I can get it, phone number if possible. Thank you.