T12 Soldering Iron Controller Board based on KSGER board v2.1S - Page 1
Forum section: electronics / projects

author: omega9380
author_rank: Newbie
timestamp: May 06, 2022, 10:46:48 am
content: OK, so after reading thru this thread:https://www.eevblog.com/forum/reviews/t12-stm32-v2-1s-soldering-station-controller-schematic-etcand wanting a "definitive T12 board", I took a look at both floobydust and Mindstorm88s schematics, and kinda zoned out for a few daysHere's the results. I have created a KiCAD schematic and board, complete with JLCPCB part numbers.I want to stress a point that I amnot an electronics engineer. In fact, my day job is an IT administrator. I play with KiCAD as a hobby. I'm not formerly trained in electronics or PCB design, so be gentle with the pitchforks when you see my trace routingNow, I didn't design the board for the original case that comes with most of the kits you get on AliExpress or BangGood. I personally don't like having a high-voltage device in a plastic enclosure. I am designing the board to work with an aluminum enclosure I had lying around, found on Amazon:https://www.amazon.com/gp/product/B07KYDVH4T/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1I would like to get this board manufactured but I wanted to send it to the experts here on EEVBlog Forums first. Please tell me if this will burn down my house, blow up my computer, or steal my wife and car.The full design files are up on GitHub:https://github.com/omega9380/KSGER-CoverplatesI'm attaching the board renders and the schematic PDF for all to see.UPDATE: After some feedback from flobbydust and DavidAlfa in the original thread, I created this post to not take over the original. I also played with the trace width a little bit.As I stated above, I'm not an EE nor formerly trained in board design. I put my design up on GitHub and posted here on EEVBlog to get the guidance I need to properly lay out this board. Feedback (constructive please) is very welcome, I do want to learn and get better with my board layouts! If I have to I will not hesitate to completely recreate the board from scratch so I can get this right!

author: omega9380
author_rank: Newbie
timestamp: May 06, 2022, 11:01:52 am
content: OK, created v2.0 on the GitHub and removed all the traces of the above board to start from scratch. Will post updates!

author: thm_w
author_rank: Super Contributor
timestamp: May 06, 2022, 10:54:02 pm
content: Looks good to me, you may consider separate RC filter for VddA input.Have some spare IO available on pads.LCSC has the GD32F103 for $3 if thats what you plan on using.

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 06, 2022, 11:25:16 pm
content: Tou barely fixed anything since last version, I'm not going to repeat the same

author: totalnoob
author_rank: Regular Contributor
timestamp: May 27, 2022, 11:16:11 am
content: Have you worked any more on this? Any updates?Edit to add:One point, a lot of folks use Dave's firmware to be able to use a JBC handle with the KSGER boards. Perhaps make a built-in way to switch between the two types of handles? I believe on the real KSGER's you need to cut a trace and possibly add another wire to one of the outputs to the handle. It might be worthwhile adding in a spot on your design to have a jumper that can be used for the T12's and removed when using a JBC handle (or an external switch to allow users to switch between handles without having to open the station) and whatever other jumpers might be needed to be able to more easily switch between handles.