Voltage Regulator Constant Heat
I have this 7805 voltage regulator:
I put a piece of aluminum about 2"x2" on the voltage regulator to act as a heatsink.
When my V in (7.5V) and my ground are connected, the voltage regulator produces heat (temperature at least 104F / 40C) , even when V out is not connected.
When V out is connected, it produces slightly more heat.
Is it normal to see the voltage regulator producing heat even if when it's not outputing any current?
Is it safe to put this in the eyeglass compartmet of my car?