I used a Diavolino* in a project with an input voltage of 12v but I have an Ethernet shield. Everything runs fine when I use the usb/ttl cable but the system goes bonkers when I run it off the 12v line. By bonkers I mean that the power leds blink and it restarts itself. I suspect it's because the usb port can provide 500ma but the 75L05 can only provide 150ma?
I have a 7805 but it would have to be 'convinced' to fit. Is there a replacement for the 7505 that can provide around 500ma?
*I think this board is brilliant. It's simple and the price is right.