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
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.