The soldering iron controller built on stm32 micro controller. AC6 - STM32 System Workbench & CubeMX software development tools have been used to bult the project. Project page: https://www.hackster.io/sfrwmaker/soldering-iron-controller-for-hakko-t12-tips-on-stm32-c50ccc

Revision history

01/15/2020

• Now tip activation menu is avalable in tip selection mode, you need long press the encoder
• Debug verion is avaliable. In this firmware the internal information is shown on the display as following:
  • P T

  •    C      
    

  • (i-t) A, where P - is the applied power (rotate the encoder to change this value) T - is the IRON temperature C - is the current through the IRON A - is the ambient temperature "i" means the controller assumes the IRON is connected "t" means the tilt switch is active (IRON is in use)

01/11/2020

• The schematics changed
• Buzzer is always on issue fixed
• Screen saver feature implemented
• New encoder button procedure increase the management stability

11/16/2019

• Fixed incorrect message processing issue. Now "EEPROM read error" message would be displayed in case if the controller cannot access EEPROM IC.
• Empty slot for TIP calibration data issue fixed. The slot of non-active tip can be used for newly activated tip. When new tip activated, the controller checks data written to EEPROM.
• If tip configuration data would not read correctly the "EEPROM write error" message would be displayed.

11/09/2019

• Tip connection issue has been fixed.
• Capacitor C8 has been removed from schematics.

11/05/2019

• New Encoder algorithm implemented, just press and hold the encoder button for long press
• EEPROM scheking procedure implemented, two error messages added
• Several issues fixed including:
  • default tip calibration data issue
  • automatic adjustment of the tip temperature depending on the ambient temperature issue

10/21/2019

• Fixed i2c type display initialization

10/15/2019

• Fixed incorrenct ambient temperature readings when power is on

10/10/2019 New controller version released, v2.00.

• Simplified schematic implemented
• New powering algorithm implemented
• OLED displays with SPI or I2C interface are supported
• PWM frequency decreased to 20HZ
• The project migrated to c++
• All procedures were revisited
• u8g2 library used in the project
• Previous release has been moved to v.100 folder See detailed description on hacsters.io site

22/10 2018 (v1.00)

• Eeprom size error fixed
• New schema of saving tip data to the eeprom implemented.
• Now only active tips are placed to the eeprom. It is possible to ad new tip to the tip list.
• New calibration procedure implemented
• Minor bug fixed

01/04/2019 (v1.00)

• Tilt switch implemented