ESP32 JBC soldering station

1. Open source projects.
2. Software: It is the VScord source code, and the attachment is the exported Bin file.
 
 
           The firmware has built-in verified curve


JBX-5DK-D Jiboxing JBC 245 5mm large blade standard temperature (default) and
 
other tip curves will be updated later. The built-in 
measured Jiboxing soldering iron tip has a maximum power of about 210W and the best temperature recovery effect. The resistance value is 2.4- The current heating frequency of the 2.8R
soldering station is 155HZ. It was originally 255. I accidentally burned the soldering iron tip, so I lowered

          the control board schematic diagram

3. Hardware changes and accessories:
 
(1) The amplifier circuit uses SGM8632XS, 6MHz rail-to-rail COMS operational amplifier
 
(2) Original Negative voltage power supply requires two-level conversion, and the cost is relatively high. Now it is changed to a buck circuit modified by DCDC. The measured ripple is 10-15mv
(3) The screen part originally used I2C finished product modularization, which was relatively expensive, and now uses a split design. 30P0.5 is connected to the FPC socket, the SPI driver response speed is smoother, and the driver circuit is still onboard.
(5) The screen uses SH1106 from Zhongjingyuan, but its official store does not provide free shipping. If you need to make a few units, you can go to the official store to buy more affordable ones.
(6) If you think the official store is expensive, you can go to this store or his products are The original author of Zhongjingyuan (7) actually tested the T12 control, but when I measured the JBC, I found that the JBC temperature screen showed 450, but the actual test could only reach a high temperature of about 420, so I modified          the operational amplifier amplification
 
 
with the help of the UP guys.
Multiples, there is no problem with JBC temperature control in actual testing.
(8) Since I modified some of the pin positions for the sake of aesthetics, the program can be used with other Suzaku authors, but EC11 does not work properly.
(9) The moS drive circuit has been modified and a diode has been added to speed up the MOS when it is turned off.
(10) The PMOS tube uses Tuofeng Technology's 3*3mos. The package is small, the current is large, and the price is cheap. You can take a sample
https://shop324650222 .taobao.com/?spm=a230r.7195193.1997079397.2.52bd38e3u2ml2D
 
(11) The PCB matches the 8838 specification aluminum alloy shell (bolt specification M2), and the recommended length is 10cm. The shell dimensions (such as bolt specifications) produced by different manufacturers are not exactly the same, so you need to confirm whether the assembly dimensions match.
(12) The high-voltage input on the back panel adopts a two-in-one three-hole plum blossom interface, which is small in size.
(13) If you need to use other models or I2C screens, modify the following two places.
(15) The ESP32-PICO-D4 used in this project has the advantage of small size but requires relatively high manual work. Therefore, if a friend needs to do it but is afraid of damaging the IC due to poor workmanship, you can open a steel plate Taobao for about 20. If you are too lazy,
         If you don’t have enough skills to open the steel sheet , you can ask me to help you attach the positive and negative power supply parts and the main control part
(16) because the input step-down DCDC uses WD5040. If you are just doing it for fun, go to the group to buy it. I have a PCB foundation. You can try to modify the positive and negative voltage power supply parts yourself.
           The positive voltage is 3.3V and the negative voltage is 1.65V.
(17) Communication QQ2 group 452882571
  (18) The existing firmware requires calibration before it can be used, and the program using PID near-end calibration will be updated in the future.
(19) The attachment comes with an ESP32 automatic downloader, based on CH343.
4: Line connection
(1) Due to wiring reasons, this project is not compatible with the handles on the market and the line sequence needs to be changed.
(2) The downloader can be downloaded manually. After powering on, first press and hold #EN and then press and hold IO0. Release #EN and wait for the download to start. Then release IO0.
    You can also use the ESP32 automatic downloader
 
WD5040 from another project. If you need it, you can go to my Xianyu to buy it. The shipping fee is from Pay
attention! Notice! Notice!
Do not paste D3 in the mounting diagram, which will cause the temperature to not be reached or controlled.