A clone of the cheap T12 soldering stations, attempting to eliminate cheap pitfalls
Article excerpt
Open-T12-Soldering-Station is a clone of the cheap T12 soldering stations, attempting to eliminate the shortfalls of cheap. Useless without the fine firmware from https://github.com/deividAlfa/stm32_soldering_iron_controller. It has provisions for a backup battery. Jumper selectable between internal and external NTC as some of the new handles don’t contain a NTC, so this gives you the option if […]
Open-T12-Soldering-Station is a clone of the cheap T12 soldering stations, attempting to eliminate the shortfalls of cheap. Useless without the fine firmware from https://github.com/deividAlfa/stm32_soldering_iron_controller.
It has provisions for a backup battery. Jumper selectable between internal and external NTC as some of the new handles don’t contain a NTC, so this gives you the option if you don’t want to add one to your handle. There are also jumper option for configuring different soldering handles. It is setup to use the 1.3” 6 pin OLED display.
The pinouts match the KSGER stations for compatibility with the above mentioned handles. There is no provision for the real time clock in the firmware, I see it as useless.
Some of the cheap boards had issue with the linear voltage regulator dropping out from thermal protection as the power was quite high dropping from 24V to 3.3V. This design uses a switching regulator to step down from 24V to 5V, and then a 3.3V linear regulator for a clean 3.3V supply.
See the project on GitHub.