wvmarle:
In which case you still need to add your protection circuits and all... This is normally sold as phone charger, for that application short power glitches are not an issue. So in the end more work and possibly more cost than the buck converter.
That was also my thought I didn't think they had that sort of protection so deffinately cheaper and better in the end anyway
They're not designed 'just as phone chargers'. They power GPS units just fine, and I've not experienced any power glitches from my adapter in the past 5 years I've used it. When my GPS gets unplugged and even replugged right away, it prompts on whether it should stay on, so it's not just simply missing any power glitches.
I'm thinking that even though it powers fine and a GPS runs fine doesn't mean the arduino will it could still get voltage spikes and blow. Not to say it wouldn't work it may work fine I just don't want to blow one so for the sake of a few caps and diodes I'd rather have it protected
I'm thinking that even though it powers fine and a GPS runs fine doesn't mean the arduino will it could still get voltage spikes and blow.
You would probably be wrong. Manufacturers of automotive electronics understand the problems and plan for them.
Do not worry, I have components parts last for about a year now nothing wrong.
The only problem is all of your components connected to the car supply must withstand above 35V.
If you are afraid, make it 50V!