Improved T12 controller
Designed by The Undocumented Engineer in United States of America
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If you wish to order this from outside the USA, please message me and guide me through your country's process. Sorry, I don't have any experience in this area. This is a high quality version of the…
Read More…If you wish to order this from outside the USA, please message me and guide me through your country's process. Sorry, I don't have any experience in this area.
This is a high quality version of the common T12 soldering controllers. It was designed by me to be compatible with the excellent opensource firmware written by deividAlfa this purchase includes a $3 donation to the above author. This firmware is not my creation and I want to be fair about this.
I designed this after ordering several T12 stations and never knowing what you would actually receive, even the same hardware version had major variations. Often having counterfeit STM32s, or not even a STM32s, and I had to replace the CPU to run the firmware. Other issues include not being able to use the battery backup as an external RTC was installed and and the battery didn't feed the CPU, I removed the pointless clock function, the firmware has no provision for a clock anyway. Some units also have issues with linear voltage regulators overheating, poor accuracy, NTC being moved from the handle and not getting good cold junction temperature readings for thermocouple correction.
The voltage regulation is a switching supply to drop from 24V to 5V and then a linear LDO drops the 5V to 3.3V to eliminate overheating while providing a quite 3.3V for cleaner measurements. High quality components are used. Resistors are over sized in places with higher power dissipation, and are 1% in all measuring circuits. Transistor specs have much more voltage headroom. Jumpers can be configured for the NTC to be in the handle or on the control board. A header and pigtail for a 3V battery(3.3V maximum, 1.5V works in testing) to remember the tip and temperature memory after power down is also included. Requires 24V for operation, approximately 3.5 amps is minimum. Unit will run as low as 12V, but with much slower heat up and less total power. I run one from a 20V cordless tool battery. Firmware has a low voltage cutoff setting to protect the battery
Faceplate should fit a KSGER or Quicko enclosure. It's of a 1.3" OLED display. The display header pins might need an offset bent to align the display with the window depending on the display used.
If you already have a KSGER station with a 6 pin SPI OLED display, you can reuse the display. The encoder and GX12-5 should fix from most Ksger units. The board is easily adaptable to the Quicko and other brands.
Wiring for other units should not be complicated, please see github documentation. It requires a push button encoder, 1.3 inch 6 pin SPI OLED display and desired iron connector. A 3V buzzer is required if you wish it to make noise. Also optional is a 3V battery(3.3V max, 1.5V worked in testing) to remember the tip and temp selection on restart is handle to reduce EEPROM wear. Connector and pigtail included.
This is the a ROHS complaint version. The included Texas Instruments OPA336N/3K opamp and jumpers need to be soldered.
Complete kit includes display, encoder, knob, and 5 pin connector.
Required items to complete. Connector for your soldering handle. Push button encoder and knob. 6 pin SPI OLED display.
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