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DIY JBC 245 Soldering Iron Controller (Beta WIP)

1 year ago 2642
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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.


DIY JBC 245 Controller (not tested yet)

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

  • modell for 3D printing : {LINK}


Soldering station sch



ID Name Designator Footprint Quantity
1 fa33d4808b42d46b96893a5da4a98304 U1 TQFP-32_7X7X08P 1
2 dace834719834d06ba10e4773afaade8 X1 HC-49SMD 1
3 6cd0b6c628754fb1a2df1909dfadec57 C1,C2 0805 2
4 59e46eefa6a044e59adf675d759077b0 R1 0805 1
5 36f681d3a20b4e35873b5e260ef012d3 U2 DIP-11.6X6.0X10.16 1
6 17eb339750ed2e3756214c176201643d P1 HDR-6X1/2.54 1
7 c5e8e6c3ca15475fbdccbb7bd2730cb3 U3 DIP-4 1
8 IRF9540 Q1 TO-220(TO-220-3) 1
9 d4a844d81a8421ba55bf9bbe0176c427 R2 0805 1
10 5b471290f7a94f708959a008221ad0b8 R3 0805 1
11 5f9e0fdb360248458d36ad1814939cbd U4 SOIC-8_150MIL 1
12 45629399d4e74513b38d16b8805528f5 C3 0805 1
13 21f8f80a3f7c3c2b00b33f71a31ff6ef P2 HDR-3X1/2.54 1
14 7ff5b657d9f65ca285001e2b488e2e99 P3 HDR-4X1/2.54 1
15 0cdb1cb49c9de4de639ad6555a869608 P5 WJ500V-5.08-2P 1
16 140d1c42f592efeaab7dd37550d09c29 P4 WJ500V-5.08-3P 1
17 LM7805EE U5 TO-220 1




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