Scematic, Arduino Code and map of components:
http://bit.ly/2q6L1v3

I am buying most of my tools and components from AliExpress, if you are a new user, download the Aliexpress app and subscribe using the following link to earn 5$.
https://a.aliexpress.com/_mtN5u3w

Things I used:
- Arduino Pro Mini https://ebay.to/2JaxyLu or https://bit.ly/343vT1a
- Aluminum Enclosure Box (100x66x43mm) https://ebay.to/2LkiVlp or http://s.click.aliexpress.com/e/bvP4pe5K
- 3296W-504 500K Trim Pot https://ebay.to/2ssK3HA or http://s.click.aliexpress.com/e/cGonLqWy
- 3296W-103 10K Trim Pot https://ebay.to/2LWXMhU or http://s.click.aliexpress.com/e/bN9xTiOM
- 0.1uF 100nF 50V 104 Ceramic Capacitor https://ebay.to/2LhzAG5 or http://s.click.aliexpress.com/e/JdRJO2G
- 2pcs Panasonic FC 1000uF/35V Electrolytic Capacitors https://ebay.to/2J1Pe98
- Buck Converter https://ebay.to/2szhg3u or http://s.click.aliexpress.com/e/IuzNvvZ
- 30 Values Resistors Kit https://ebay.to/2XrYjkB or https://s.click.aliexpress.com/e/_dXR...
- Ultrafast Recovery Diode UF5408 https://ebay.to/2JpadVj or http://s.click.aliexpress.com/e/bv52QAz2
- Active Buzzer https://ebay.to/2Jt1aTG or http://s.click.aliexpress.com/e/cjQBFzMk
- Zener Diode 15v 1N4744A https://ebay.to/2kNMSix or http://s.click.aliexpress.com/e/bP0IgyY0
- 16mm Knobs https://ebay.to/2ssFqxq or http://s.click.aliexpress.com/e/byyfP7Zm
- 6x8cm DoubleSide Protoboard https://ebay.to/2X2tSC6 or http://s.click.aliexpress.com/e/bdklOSRI
- LCD Display Module 16x2 https://ebay.to/2kJ9AIk or https://s.click.aliexpress.com/e/_dT0...
- Rotary Encoder https://ebay.to/2LUD4Q4 or https://s.click.aliexpress.com/e/_dWW...
- HEATING ELEMENT for HAKKO Soldering Station Iron https://ebay.to/2WYNvuV or http://s.click.aliexpress.com/e/btOZTKg0
- Transistor TO-92 2N2222 2N2222A https://ebay.to/2LTsB7w or https://s.click.aliexpress.com/e/_dTJ...
- Transistor TO-92 2N2907 2N2907A https://ebay.to/2Jd0ez6 or https://s.click.aliexpress.com/e/_dUE...
- IRFZ44N MOSFET https://ebay.to/2X3S7QD or http://s.click.aliexpress.com/e/cnXvzEkC
- Terminal Block https://ebay.to/31TWpZJ or https://s.click.aliexpress.com/e/_dWU...
- Aviation Plug https://ebay.to/2X3z6sM or http://s.click.aliexpress.com/e/kdWngwk
- AD822 or MCP602 Op-Amp ( ---MCP602 is a better choice than AD822-----) https://ebay.to/2kHLBcB or https://bit.ly/3aDuu4d
- 2.1mm DC connectors https://ebay.to/2xeEAGL or http://s.click.aliexpress.com/e/yQ6NcVw
- Soldering Station Iron Handle https://ebay.to/2TO4xHo or http://s.click.aliexpress.com/e/bMStYsVw
- Black sealant https://s.click.aliexpress.com/e/_d6b...
- Soldering Iron Stand (Metal – the one I’m using) https://ebay.to/2JcBRlp or http://s.click.aliexpress.com/e/b3EFsqbO
- Soldering Iron stand https://ebay.to/2Li18Lp or http://s.click.aliexpress.com/e/bciTXtTE

- My multimeter/thermometer https://bit.ly/2wPKAc7
- FTDI Adapter https://ebay.to/2QVTdst or https://bit.ly/39oEDQv
- 150pcs heat shrinks https://ebay.to/2MoPp2l or https://bit.ly/33NUmHd
- HSS Step Cone Drill 4-32mm https://ebay.to/2OdZzQL or http://s.click.aliexpress.com/e/bQwW0XSo

Description:
I decided that it was time to upgrade my old soldering iron, which didn't have any kind of temperature control. So instead of buying one, I said why not to make one based on the hakko 907 and controller by arduino? :)

This project is based on a project that I found on the internet. The code and schematics have been modified for my project. Credits for the original schematics and the arduino code: https://bit.ly/2ssXXcO