Anyone made an external FET connection board for Duet

Hi. Looking through some older posts I saw this, where Treth was suggesting running the bed heater from a board driven via the external FET connection:

[forums.reprap.org]
and
[forums.reprap.org]

Has anyone made such a board, and, if so, what value components did you use?

Thanks

The standard bed heater does not need an external FET. If you want to drive a more powerful bed heater, best go for 24V to avoid needing very thick wires to it. Then the Duet can handle a heater of up to about 288W (i.e. 12A), or probably a little more if it is a Duet 0.8.5.

If you do need to go higher than 12A or so then this [reprap.me] is probably a good device to use. Unlike a straight mosfet, it is opto isolated, so it won't give problems with differing ground potentials.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].