For example, DIY T12 electric iron has a maximum current of over 10A and is not suitable for power equipment.
The motherboard size is about 135MM*81MM, and you can install a power-off switch (no large current), etc.
A practical example can be seen in the figure below.
The motherboard diagram is an issue with the previous sample. It has been slightly modified and has been corrected in the PCB.
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