摘要：The development of an electronic world today now very developed so rapidly.Microcontroller as a component of so very supportive to their characteristics andfunctions as the brain that runs the other components in a single rangkaainelectronics such as timers and counters. Microcontroller with their character,although the system work yasng simple minimal and can even make anelectronic circuit in a compact and teringarasi work properly. By considering theissues above so much a function of the microcontroller in an electronic circuit.The author tries to apply it in the form of an electronic circuit that is viewerhours and automatic timer. This series menggunkan AT89S52 microcontroller,the RTC (Real Time Clock) and HD47780 LCD displays use.
