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DIY JBC 245 Soldering Iron Controller (Beta WIP)

10 months ago 1166
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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 ATMEGA328P-AU U1 TQFP-32_7X7X08P 1
2 16mhz X1 HC-49SMD 1
3 22pF C1,C2 0805 2
4 1K R1 0805 1
5 B0505S-1WR3 U2 DIP-11.6X6.0X10.16 1
6 Programing P1 HDR-6X1/2.54 1
7 PC817X3NSZ9F U3 DIP-4 1
8 IRF9540 Q1 TO-220(TO-220-3) 1
9 10K R2 0805 1
10 330 R3 0805 1
11 MAX6675ISA+T U4 SOIC-8_150MIL 1
12 1uF C3 0805 1
13 POT P2 HDR-3X1/2.54 1
14 LCD P3 HDR-4X1/2.54 1
15 VIN P5 WJ500V-5.08-2P 1
16 Iron P4 WJ500V-5.08-3P 1
17 LM7805EE U5 TO-220 1




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