Can I power my old (first-build, got it from SF in 2006 or 7) arduino using a car's 12v, on the 9v input? I could have swore the original arduino documentation said not to power the device with more than 9v, due to the regulator.
I am planning out the feasibility of building an MPGuino using parts I have laying around (and they are numerous!). As to why such a simple question is being asked here in the first place, I will now lament:
Upon looking for my answer on arduino's main site, I was struck with a sense of the achille's heel of open-source. I looked, and looked some more, and only found mentions of powering the arduino with USB. I searched for a good 20 minutes! I discovered that the arduino BT should never receive more than 5.5v, and that 9v batteries may drift a bit but the regulator can handle it.
But nowhere in the getting started guide nor the tutorials, was there a punctual mention of external power and its limitations. Maybe I didn't dig enough?
And that is where I find open-source's "achilles heel". Open source is a great idea and can be fruitful in innovative ways, but to someone approaching the site for the first time, useful information requires a bit of digging through disorganized ramble, and sometimes seems unattainable. The impression I get is, a whole lot of fragments cobbled together and called a product. Please, take this as constructive criticism, arduino creators, I really hope you come across this and my efforts are not wasted.
I entered the scene when arduino first came around. I couldn't imagine being a beginner now. Yes, the basics might be there, but really, some intuitive page organization would greatly reduce the amount of questions posted to the forum.
And that is why I find myself here, asking about a car battery's likelihood of frying my vintage arduino. </wall-of-text>