AC adapter and voltage regulator

Hey there,

I'm powering up a microcontroller based circuit, with some more LEDs (16 and more), so they will be connected to the AC adapter instead.

However, I only have the AC Adapter which converts 230V to 12V and 1.5A, and with the +5V voltage regulator (7805) which further steps down to 5V and 1A.

The thing is, will it burn the regulator or the circuit?

Or must I get the AC Adapter which has the current rating of 1A to match the voltage regulator as well?

Ok, suppose you were going to connect your 7805 to the 12V battery in your car instead of to your 1.5A adapter. A typical car battery is capable of delivering in excess of 750A!! How much current will be drawn from the battery if you connect a 1A load to the output of the 7805?