How do i power this circuit?
I want to control 4 dc motors with my old laptop's parallel port, via L293D motor driver chips and 7805 voltage regulators. my question is how to set it up to run it all on one power source(batteries)? the schematic im going to use is here
. i want to change the 7812 to something that will put out 3v, any suggestions?
also, what batteries would be best to use, considering the 2 voltages it'll be running off(5v & 3v)?
i have included the pinout diagram for the L293D