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I ordered a MOSFET module on eBay for my 3D printer and I did not get the one in the picture but I got this:
If there is any way I could use this on my Anet A8 could someone tell me how, as it only has one input connector, DC in, and 12 V out.
No, this module is completely useless for your intended purpose.
The load side is marked with "5A 5-220VDC". This means it can only switch up to 5A, maximum. The heated bed draws more than twice this current.
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