I got a lot of messages about the project, or the code, but the situation was I put the project on hold for a while, when waiting for parts to arrive, then modified multiple times without documenting etc... the project got finished working well, heat up quickly, but when I have time I will make a fully documented mark 2 version.
Wich can be powered with a standart 19V DC laptop charger.
The project based on the Atmel328 μc, and i try makes simple as i can. The first problem driving a jbc tip is the thermocouple and the heater have a common pin and its not the GND. On some forum i found the easyest way to do is just siple pass the heater current on the thermocupple but thats shorter the tip's life, so thats not an option for me.
In my solution i planned to use a DC-DC isolator for the μc and an optocoupler to control the P channel mosfet.
To makes it work you need a 10k pot and a 1602 I2C LCD (not shown on the schematics)
As enclosure i design the simplest, one of my friend bethlenke is kind enough to 3D model & 3D printed for me
The software still in WIP