Hot Air Disoldering Gun

The hot air disordering is a project that can be made in 2 to 3 hours with low cost as long you have the required stuff at hand or selvedge for broken electrical equipment.

While I was cleaning up some junk I found my broken soldering iron and an old laptop fan, at that moment an idea came to mind what it take to make an hot air disordering gun, and I started collecting every material I could lay my hand at to make this possible, first was the heating element that can handle high temperature and require small wire to achieve the goal it was easy to find the wire that was able to fulfill the task from an old hare-dryer, the second problem was the supply voltage that power the heating element I decided to use 24VAC from a step-down transformer since using the main 230VAC would be very dangerous, the third issue is control for that I scratched my head until I realized that a more convenient than pulling the plug out of the power socket so I decided to use a relay to switch the 24VAC line on and off to make it easy to operate the machine, the last problem is the fun speed in order to reduce complexity I decided to power the fan with a continuos and this made the machine operate at a single 24VAC power supply the fan at the same speed and reduced the overall machine temperature control, this’s not a big problem for what a intend to use it for.

>Recycled

Brocken soldering iron

230V to (+24V 0 -24V) 5A and (+12V 0 -12V) 0.5A

1 meter hear drier heater wire

2 x 1.5mm² 1meter wires

4 x 0.25mm² 1 meter wires

5V centrifugal laptop fan

12V relay

18Ω resistor

L7805CV linear voltage regulator

50V 470uF capacitor

10V 470uF capacitor

1 100Ω resistor

1 1kΩ resistor

1 full bridge rectifier DF06

1 white LED

1 blue LED

1 push button

Hot glue left overs

Fiber isolator

10 x 2 cm Aluminum foil

>None recycled

clear tape

10 Cm resin soldering tin wire

Soldering iron

Players

Screw driver

Pen

Knife

In order to make the heater core the first thing to do is to remove the soldering iron core and use it to make the required measurements, than wrap the heater wire in a pen to create the required shape of the inner heater core.

Position the fun at the required part then use knife to mark the limits of the fan, than remove the rubber part and cut open the tube.

Use the hot glue left overs, melt them using the soldering iron in order to put in place the fun and close all possible air leakage gapes.

Remove the tube that housed the solder tip, that wire up one side of the heater core, insulate the connection with fiber insulator, connect the other wire to the body of the metal tube, reuse the insulator from the soldering wire core, putt the heater core in the tube then close the unite and connect the other end of heater core in the body of tube and close the holes in the body of the tube to prevent air leakage.