lax123:
7805 should work, it has a voltage dropout of 2V, so if u get below 7V at the input it wont be able to regulate to 5V.
Are there regulators with a smaller dropout?
The 7.2V comes out of a battery pack. It will probably drop when it is almost discharged. Can I use the 7805 anyway?
If the regulator is correct, can I just connect the Vin and Vout to it or do I need a further circuit like this: