Arduino Power Question

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1

Attached is the diagram showing how I hooked up my Arduino and 10k ohm potentiometer to run my Servo motor. I hooked it up powering it with a 9v battery and it worked great. My intentions are to power it with a 12v marine battery (this setup is for my boat), but when I hooked it up to that, boom the board got hot and wont work anymore? I was told this is the correct setup to use if I want to power it from a 12v battery?

Clearly too many volts are getting to the board and frying it? My question is, what if in the positive and negative lines to the battery, I put in a inline voltage regulator (12v to 9v)? Will this solve my problems??

It works great with a 9v battery, and I would just use that but im not sure how long the battery will last powering the board and making the servo run??

2

Which board gets hot? Arduino? Or the voltage regulator on the breadboard? For the voltage regulator:

going from 9V to 12V, the voltage regulator needs to dissipate nearly twice as much power as the voltage drop increases from 9-5 (=4V) to 12-5 (=7V). So depending on the current that is draw, it will get warm, hot or bloody hot.

I think you’re also missing some capacitors on the input and output of the voltage regulator.