T12 Open Source Soldering Iron V2.0

Features

T12 fast heating soldering station with
temperature measurement of the tip
Temperature control via rotary encoder
Short press of rotary encoder switches boost mode
Long press of rotary encoder switches setup menu
Handle motion detection (by checking the ball switch)
Iron not connected detection (by identifying invalid temperature readings)
Time driven sleep/off mode (motion detection) if iron is not in use
Measurement of input voltage, Vcc and internal temperature of ATmega
Information display on OLED
Buzzer
calibration and management of different soldering iron tips
Storage of user settings to EEPROM
Related links:
Firmware: [https://github.com/wagiminator/ATmega-Soldering-Station](https://github.com/wagiminator/ATmega-Soldering-Station)
Project video: [https://youtu.be/I9ATDxvQ1Bc](https://youtu.be/I9ATDxvQ1Bc)
Video from John Glavinos (electronics4all): [https://youtu.be/4YDcWfOQmz4](https:// ://youtu.be/4YDcWfOQmz4)
Video from LHW-createskyblue (UI-v1.6L): https://b23.tv/LiOe54On
 
the back,
I simply redrawn the schematic to adapt to the power supply.
The original design used 78M05 for 5V power supply. The total power supply is 24V, and the microcontroller power supply is 5V. The voltage drop is too large, which will cause the 78M05 to heat up when powered for a long time, and the voltage will also float, so I changed the 78M05 to MP2359,
of course, this is under the condition that the volume allows. At the same time, multiple 24V interfaces are reserved for expansion. The two 4148s of DV1 and DV2 were originally used to make the two power supplies not interfere with each other and not reverse the power (220v AC local power board power supply and 24v adapter power supply), but later it was found to be meaningless.
When reverse welding connects any material and connects to the 5.0mm back power port, it can be used as a reverse power supply interface. All
 
3D
panel functions are brought out, and multiple 24V interfaces are reserved to prepare for the next optimization.
The overall appearance of the control board
is made of PCB for a good appearance. The panel length is oversized and cannot be used for free.