USB-C-PD Soldering Pen for Weller RT Tips

Small and powerfull controlling unit powerd from USB-C-PD

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Here is my project to build a controller unit for the Weller RT Tips.

If someone knows a USB-C to USB-C silicone insulated cable I would be glad if you tell me.
Silicone insulation have the advantage of being more flexible and heat-resistant.

USB 2.0 communication, configuration and a new 3D Print are planed.

I used the PD 3.0 with 9V/3A for supply. It can be powered from an USB-PD power supply or with an PD-Power bank for soldering on the go.
The heat up time from 25°C to 350°C is around 6s. Auto-standby temperature is around 180°C, by picking up from the rest around 3s are needed to reheat.
The user-interface consist tree LED's and two buttons. The LED's indicate which temperature profile is active (Low, Mid or High) as well as the operating modes (user-standby, auto-standby, auto-off, warm-up and overheat).
One button controls the user-standby mode the other changes the temperature profiles.
The pen fits perfectly to the Weller safety rest WDH 51.

Here is the video demonstration:

  • 1 × STM32F042G6U6 MCU
  • 1 × DMC1016UPD-13 Dual Mosfet
  • 1 × LM3480IM3-3.3/NOPB 3V3 regulator
  • 1 × STUSB4500QTR USB Controller
  • 1 × F721A108MMCAQ2 1000µF Cap

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thomas.lepi wrote 4 days ago point

Hi Mike, I can't reply your comment.
A basic serial communication for data output and maybe with GUI configuration of temperatures, auto-standby time, vibration sensitivity etc..

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Mike Szczys wrote 5 days ago point

I feel like there must be cellphone MFG cables that are USB-C and silicone insulated but don't know for sure (my Pixel cable is not).

Would love more information on this. Is it a pain to work with those connectors? How about negotiating with the power supply.

Demo video and case looks great! You could put a rectangle of tinted acrylic over the flat area of the pen with beveled edges and holes for the buttons and you'd have a killer finish!

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thomas.lepi wrote 5 days ago point

Thanks for your comment! 

For soldering the USB-C connector an oven is needed due to the inaccessible pads in second row. I’ve used a stand-alone controller for negotiating the supply - it was a bit tricky to configure but finally it worked good. 

More information is coming! 

New 3D Print Design and hopefully a working USB 2.0 communication via the USB C Port. 

Its planed to cover the full flat side with a sticker but in this version I’ve just used the middle part to hold the diffuser in place. Maybe I can implement a tiny sticker on top of the buttons. 



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Mike Szczys wrote 4 days ago point

Oh, interesting. What kind of functionality do you have in mind for the USB 2.0 connection?

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