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How does this look? Is this what you suggested?
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No need for the 5k resistor connected to +12V on the left. The one on the right is enough.
Another remark: why do you use an additional +5V supply on the right? Use 3.3V here too. If it's just a matter of MOSFET threshold, select a transistor with lower Vgs.
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One thing that bothers me is this: I will need the circuit to have 300 IO traces. If I put a transistor on each end and on each trace, I will need 600 transistors per board. Don't you think this is too excessive?
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Those transistors and resistors don't make a great difference: those are small components.
Remind you already have to place 300 traces and 300 connectors with wires, which make a more bulky (and costly) hardware.
Honored Contributor
