Additional external MOSFET without using a heater port

[MihaiDesigns]

I'm trying to power an external MOSFET (the generic inexpensive HA210NO6-based extension module) without using a heater port. I have more heaters than heater ports: I'm running a bed with 4 heating zones and 3 additional heaters for other things (think of them as parked hotends that need preheating), aside from the hotend which is running a tool board. Using the boards: Duet 3 Mini 5+ and 3HC. I count 6 power outputs and I need a 7th.

I was going to drive the external MOSFET module via an IO pin, but I just realized that this board requires at least 6.5V (determined using a lab PSU). Do you have any ideas on how I could connect this MOSFET module to my Duet boards without using the power outputs? Any ideas are welcome.

[dc42]

@MihaiDesigns you can use the PS_ON output if it is free. Connect the mosfet module positive input to +12V or +24V, and the negative input to PS_ON.

[MihaiDesigns]

@dc42 awesome, thank you!