This one for example
https://www.tme.eu/pl/details/pc3h4j000 ... owe/sharp/
Just to be clear; the SCG-ATC is hardware only, and cannot function without firmware to tell it what to do. It is based on using dxControl's Gears firmware. The firmware effort is primarily headed by @dazq and dxControl, and as described here, and in several threads on search. The controller hardware may be from any design source and of any design (like Speeduino is), and this is SCG's version, as shown by both the printed dxControl credit and SCG support info printed on the production board version per the licensing terms. While SCG has listed the Speeduino forum as support, in-fact it is only a forum thread about their hardware design, and is not related to Speeduino except as a popular location of a thread about it. Therefore, only SCG can support their hardware design or fork of the dxControl firmware, and neither Speeduino nor other forum members are responsible for it or the thread's content. Again, not being harsh and only trying to be clear, so you know who and where to go for help.
I used this page for bootloader info
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