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SKR 1.4 5V IO Pin

Posted by Griem 
SKR 1.4 5V IO Pin
March 09, 2021 07:11AM
Hello, I would like to control a 5V piezo pump with my SKR 1.4 - ON / OFF is sufficient.

At first I thought it shouldn't be a problem at all to find a 5V IO pin.
Except for 3x steppers, 3x end stops and neopixels, all pins on my board are unused - but I still can't find a solution.

My first thought was simply to take a + 5V pin and and use the Bed MOSFET and switch it to GROUND, but between the 5V pin and GROUND there are approx. 19V when closed.
Other IO pins e.g. servo only go up to 3.3V

I could of course use an external relay or MOSFET board, but I thought there must be an easier way with the countless pins on the board.

Is there any way to control a 5V pin?

Thanks in advance
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