The development of science and technology with the presence of electronic equipment that is completely automated and sophisticated, with the development of the mindset of people who are looking for ease of doing activities. This is evident from the equipment or means of electronic assistance to meet the needs of an increasingly complex. This journal aims at designing simulations indicators, automated car park with an infrared sensor LED-based obstacle avoidance logic circuit that uses as a control IC 74LS00 NAND logic. IC can 74LS00 converted into and NOT as well as other logic as control logic.