DIY Soldering Station for HAKKO 907




Introduction: DIY Soldering Station for HAKKO 907

I am presenting a project that I duplicated of a very skilled guy, a welding station using a soldering iron HAKKO 907.

Is a very inexpensive project to do. I spent little money to do this project. To have a comparison, I spent to make this project was about the money I give for a simple iron (not station)

Step 1: Materials

You will see how this is relatively cheap

1- Iron Hakko 907 (you can find easily on ebay, replicas work well)

2 - Power Supply 24V (more current power supply has, the faster will be the iron with achieving the desired temperature)


4- IRF1310 (or similar)

5- Prototype PCB

6- 3xDisplay 7segment

7- 3xSwitch

8- LM358

9- Buzzer

10- Diode (4007)

11- Some resistors

Step 2: Schematic and Firmware

Like I said, I duplicated this project. It was not made by me, I make available everything that I used.

Step 3: Mounting the Circuit

I chose to mount the circuit in breadboard to study the operation only after I moved to mount a pcb prototype.

One advantage is that I set up the pcb prototype already with iron Hakko

I have been studying the operation of the heating temperature. and made various calibrations (200, 250, 300 and 400 degrees celsius)

Calibration is done with the help of a potentiometer.

but I after mounting all the pcb had to make a new calibration

Step 4: The Box

I got a small box and adapted it. The box is made by aluminum and plastic (front and rear)

At the front did a slot to put the 7-segment display also put the potentiometer (blue), and finally a switch on / off. Later put a record the Hakko iron, plug and play.

Step 5: Power Supply

As I said, the power supply must be 24V. I used a 24V / 4.2A.

You can use a charger of a laptop, but I do not advise. It is very slow to with achieving the desired temperature. Moreover can not reach 400 ° C.

Step 6: Conclusion

I have to say it's best soldering iron I've ever had.

The iron itself is cheap, about 5 €, I bought a few more tips that cost about € 5 the power supply already had at home. The rest of the components I not spent more than 5 €.

What would change:

It was a bigger box, so could put the power supply and control all together.

change the wire soldering iron. I found it a bit hard. Change to a more malleable.

For the rest think is optimal.

The maximum I could with this power supply was 480 degrees, not bad.

Source :

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    Robert Gomes
    Robert Gomes

    6 years ago

    How many amps, minimum should the power supply be able to provide?


    6 years ago

    Hmm. I like it when the FET driver is driven via a CAP (capacitor).

    That way, when the CPU freezes, you won't BURN OUT the tip.


    6 years ago

    Great project.

    The 7-seg displays, are common anode or catode?


    6 years ago

    I have been looking at doing the Hakko T12 soldering iron and station but there doesn't appear to be a full kit they come in a variety of kits. Would anyone know what kits you would need to buy in order to get the complete unit?


    6 years ago

    this is awesome! I miss some info, you use 24V directly and no capacitors, only 1 LM358? I would love a more detailed explanation on this.


    6 years ago

    thanks heaps for showing this I've been looking for ages for something similar since

    my w.e.p. Station died and I'm using parts from that to build desoldering and solder station with hot air gun. Will definitely be going in larger container, may reuse the old w.e.p. 3 in one unit housing. Will send pix when done. Thanks again for this.