I have an STK500 based AVR development board that has a 7805 voltage regulator, 4 LEDs for debugging, and an L293D motor driver chip in addition to the ATmega16 chip.
I have developed an application to run 2 DC motors, 1 stepper motor and 1 servo motor. To power all these i have bought a 12 V, 4.5 AH lead acid battery.
My question is whether connecting this battery will fry my AVR development board, since the overall current consumption of just the board should be less than 500 mA. In general my question is if I have a high amperage power source such as the 12 V, 4.5 AH battery, do i need to connect a current limiting resistor in series to the circuit or will the circuit draw just enough current as it requires.