Arduino automotive power supply?
I've looked and looked for something off the shelf to power an Arduino in a automotive environment. Closest seems to be hacking up a usb car charger, but I've tried that twice and both times it didn't work (but my project works fine with the usb from my laptop, go figure). Tried dc-dc converters and they didn't work. I think it'd be nice to have something that would provide clean power to an Arduino and be as simple as hooking up +/- input from the noisy electrical system and have a barrel jack output that is clean. And preferrable something I can screw down in my enclosure. Maybe something like that exists, but I just can't seem to find it.
Any help will be apprecited.
I didn't find the right solution from the Internet.