Hi everyone! I'm a bit confused about connecting my Arduino UNO and its attached Ethernet Shield to a 5V USB car adapter.
The car adapter is a Nyko 85100-H17 (http://www.amazon.com/85100-Playstation-Vita-Multi-Power-Sony-PS/dp/B007AA8YCO), it's actually a PS Vita charger. I don't know the car adapter's power rating, but the wall charger that came with it (also USB) is rated at 1.5 amps.
Anyway, the problem is the following: I plug the car charger into a DC barrel plug connected to a 12V battery that I charge with solar panels; everything lights up, brilliant. Up until a few weeks ago, as soon as I connected the USB from the adapter to the Arduino, the light on the car adapter would go off and the Arduino wouldn't go on. When I unplugged it, the car adapter would go back to normal. I can power the Arduino normally off of USB from my computer, no problem.
Just a minute ago, I took out all the wires the Arduino had connected and tried it again, and it lit up with another car charger, then the Nyko....all the wires I had were simply to control a 7-segment LED display, so there's no way the Arduino could've been eating 1.5 amps (or could it?)
If anybody could bring a little bit of clarity into what's going on, I'd really appreciate it. Thanks! =)