i am doing a car model project. this contains three motors (toy motors) and an LED. the driver chip L293d controls the motor direction with 89s52 and this needs at least 12 v,5v constant power supply to the driver and micro controller respectively.
i initially used voltage regulator to check the circuit. it works successfully. but now i need to make it without ac supply.
my next option is to use rechargeable batteries. but i don't know weather it gives constant voltage or not. Please guide me to choose best and cheap batteries and which gives considerable stable power to the circuit...
thanks in advance!