I have a 28 volt 6A power supply going to stepper drivers + motors and the 5 V from a computer going to an Arduino. I need to add a 12 volt 150 mA pneumatic solenoid, and a transistor to control it from an Arduino IO pin. Should I use a resistor voltage divider on the 28V, or would it be better to …

Best way to get 12 V from 28 V or 5 V ?

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