DIY soldering station for Hakko 907 explained

Here I explain the soldering station I built for cheap Hakko 907 clone irons. It features a double output, a standby mode, and a rotary button. Total cost around €40. Items I used: (158x90x65) Also, a power supply with 15-24V and at least 4A is needed. On the controller PCB, I removed the in- and output jacks, and relocated both the buzzer and the capacitor to the bottom side of the PCB. http://www.e