#FirstLichuangContest#Smart OLED digital display portable soldering station (new era tool)

Intelligent OLED digital display portable soldering station 1. Introduction to the work

        Preface: I am also an electronics enthusiast. I often make some interesting works at home. Sometimes I also need to debug the company’s finished products, so I often need welding, debugging, testing, etc. Now the problem arises. The workbench at home is small and cannot accommodate many devices. , sometimes after-sales welding tools are quite inconvenient to carry when you need to go out. Sometimes you can’t weld a multi-layer board with the 936 at home, and you often need to turn on the temperature to 400 degrees or higher. It’s really hard to find suitable tools online for the 936. I found that the slightly better ones now cost more than 400 or even thousands, and the performance is not necessarily good. It is very frustrating and entangled. I believe most enthusiasts have encountered it. If a worker wants to do his job well, he must first sharpen his tools, so this is the design of this OLED portable soldering station.         Purpose: 1. To solve the problem that the existing soldering station is large and inconvenient to carry. 2. To solve the problem of inaccurate temperature control and inconvenient adjustment of the existing soldering station. 3. To solve the problem of the existing soldering station’s heating speed and temperature recovery capability. 4. To solve the problem of the existing soldering station. Single power supply mode, that is, wide range input (easy to carry, diversified) 5. Solve the dry burning problem of existing soldering stations that have not been used for a long time, extend the service life, and save energy. Estimated realization parameters:                  1. Appearance size: use 88*38* 120 profile aluminum alloy shell (half the size of the original 936 soldering station) 2. Power supply range: AC AC90-AC260V (common worldwide); DC DC12-DC28V (essential for ultra-wide range mobile out-of-town welding repairs) 3. Temperature control accuracy : The uncalibrated condition is controlled within ±10℃; the calibration is controlled within ±2℃ 4. Output performance: rated power 72W, maximum output during welding is more than 80% (that is, the ability to weld large solder joints)           design renderings** :* *                                                                                     

2. Highlights of the work     1. Innovation: A. The first use of OLED full Chinese display, which is intuitive, generous, easy to understand and comprehensive (currently the soldering stations on the market use digital tubes or broken code screens to display incomplete information) B. The first use of coding The switch is used as an input device for adjustment and setting, (it has the convenience and simplicity of traditional potentiometer temperature adjustment, and also has the multi-functional setting experience of high-end soldering station button operation) C. Use the powerful STM32 microcontroller for PID temperature control, which has higher performance than traditional temperature control. Temperature control accuracy and performance, it only takes 5-7 seconds to heat up the room temperature to 300 degrees, while the traditional soldering station takes 12-20 seconds (controlled within ±10℃ before calibration, and within ±3℃ after calibration) D. Equipped with cooling Terminal compensation provides higher control accuracy and greatly reduces the impact of temperature drift (currently, there are basically no soldering stations under 500 yuan in China, and major international brands such as Spanish JBC, German Wilo, Japanese White Light and other thousand-yuan machines) With cold junction compensation) 2. Parameters: A. Measurements: 88*38*120mm B. Power supply: AC90-AC260 or DC12-DC28 C. Power: 72W D. Range: 200-480 degrees adjustable E. Display: OLED Chinese Display, supports Simplified Chinese, English bilingual F, Others: equipped with automatic sleep, standby, brightness setting, time and date display, voltage display, low voltage protection function, handle detection function G, handle: white light 912 handle H, heating core: white light T12 heating Core 3, system architecture diagram 4, schematic diagram 1, main control 2, power supply 3, working principle description         The whole drawing is relatively simple, just give a rough explanation here. The entire system consists of power supply, STM32 main control, EC11 encoder It consists of settings, EEPROM information storage, OLED display, buzzer prompt circuit, voltage detection, clock circuit, power drive circuit and temperature acquisition amplification circuit. First, the thermocouple output voltage is collected, shaped and amplified and provided to the microcontroller AD, and then the current temperature is calculated and displayed based on the thermocouple graduation value. Then the set temperature and the current detected temperature are compared and the PWM control power circuit is output to heat the heating core. When it detects that the actual temperature is lower than the set temperature, the duty cycle is increased to provide heating. When the set temperature is reached, the output is stopped, and the very small output maintains a constant temperature. The larger the temperature difference, the higher the output duty cycle, and the smaller the temperature difference, the lower the output duty cycle to prevent temperature overshoot caused by full-speed heating. ** 5. Bill of Materials (BOM) **    1. From Lichuang Devices     STM32F101C8T6B   http://www.szlcsc.com/product/details_8836.html     OPA336NA   http://www.szlcsc.com/product/details_52049.html     Buzzer   http://www.szlcsc.com/product/details_48625.html     SPX2954-3.3   http://www.szlcsc.com/product/details_33735.html     AT24C08   http://www.szlcsc.com/product/details_32379 .html     PCB proofing     2, externally sourced materials     OLED12864, soldering station shell, heating core, handle, power supply materials, etc. **** 6. PCB physical pictures ****     1. PCB shell panel     2. Main control PCB     3. Power supply PCB physical pictures ** 7. Software part description **     Non-open source work, no software introduction, this work I have completed the matching kits. If you need various matching kits, you can contact Chongqing DIY Xiaoyue (qq: 1542914807). Thank you for your support. **** 8. Work demonstration ****

  **** 9. Summary ****         1. First of all, thank you to Lichuang for this platform. From original parts procurement to PCBA, it is basically one step, which brings great convenience and reliability to everyone;         2. With the help of this event, this work It has reached the expected parameter performance, and the actual test far exceeds the domestic 936A, 936D, and other domestic non-high-frequency soldering stations priced below 500 yuan;         3. The supporting facilities of this work are complete, and various configuration modes such as kits, complete machines, and splits have been formed. Sales, prices range from 100 to 700 yuan, and high-end models have also been launched. The JBC245 soldering station beats the 150W high-frequency soldering station 205H;         4. Digital hot air guns, electric tweezers, electric solder extractors, etc. will be released in the future. CNC experimental power supply, two-in-one soldering station and many other DIY equipment; finally, please pay more attention to it and leave a message for support if you have any good suggestions or ideas! ! !

For more project details, please see the link: http://club.szlcsc.com/article/details_640_1.html

This project is owned by Lichuang Community " DIY Xiaoyue "