I want to install an arduino in my car to suppement my car PC.
I got a few choices on how to power it:
- 19 volt regulated power from an OPUS DC-DC power suppy
- 5 volts reguated power from the same source
- USB connector
- Unregulated 12 volt power from the car which of course fluctuates a lot.
Is an unregulated power source from the car OK?
I am leaning towards the regulated 19 volts as it would power up in sync with the Car PC but I think that is at the top end of the specifications so I guess I need to step it down a bit. Is there a simple power circuit that would step the voltage down to 12 volts or so? I was not sure if a simpe votage divider woud suffice.
Thanks in anticipation.