# Geeetech GT2560: Electronic safety and power source

I'm about to build myself a 3D-printer.

After a long search for a brain for this one I came across the GT2560 from Geeetech, because it leaves a solid impression on me. The manufacturer himself has a quite extensive wiki page for this board.

My idea now was to use an ATX power supply.

The PSU is a be quiet! BN257. On 12 V (combined) it can deliver 324 W. On 12V1 there is 20 A, on 12V2 16 A.

Would that be enough or would you rather use a 24 V power supply?

Since I have read some reports about the Anet A8 and its danger of overloading, I am a bit uncertain, even if the GT2560 looks a lot better than the A8.

Are the connections to which the heating bed and the extruder are connected sufficiently large to withstand 10 A and 15 A respectively, or should I solder the cables directly to the board from the very first?

According to the information I received from Dr. Search Engine, MOSFETs of type STB55NF06 are used. According to the data sheet, these can withstand loads up to 60 V/55 A. I don't necessarily need to replace them with external ones, do I?

• these can withstand loads up to 60V/55A, yes, but only for a very specific meaning of "withstand". The 55A rating assumes/requires the MOSFET to be attached to a very, very large heatsink, dissipating a large amount of power. In practice, these MOSFETs aren't good for anything more than 10A or so. Take MOSFET power ratings with a very big grain of salt unless you know a thing or two about electronics. – Tom van der Zanden Jun 20 '18 at 19:18
• @TomvanderZanden maybe a external Solid State Relay is a better choice? – hirnwunde Jun 20 '18 at 20:15
• It would be a better choice to make a separate question about MOSFETs ;-) – Tom van der Zanden Jun 20 '18 at 20:39
• For sure. I will gather more informations on MOSFETs in general :-) – hirnwunde Jun 20 '18 at 20:42