RANCANG BANGUN RUMAH CERDAS BERBASIS MIKROKONTROLER AT89S51

Have been designed system of smart house based on microcontroller AT89S51. This System be of benefit to busy pawnbroker, so that the house often omitted in a state of empty. Exploitedly this system, hence the pawnbroker needn't worry to house conditon. This system consist of hardware and software. The hardware consist of a motion detection sensor, ligth sensor, rain sensor, comparator non inverting, driver relay, timer eksternal, a microcontroller, and seven segment used to display clock. The software consist of the program use assembly Ianguages where implementation on microcontroller. This system can be activated any time according to pawnbroker to existence one who enter to into house, go down rain and can animate house lamp automatically based on ligth sensor and setting time which have been programmed on mikrokontroler. This system was realized and can detect existence one who enter to into house when does human motion detection sensor being triggered, detect when does water existence in rain sensor and when decrease of light intensity