<![CDATA[ The security system is one important part of life, one of which is a security system to protect objects / valuables from theft. The study focused on the detection of system security, using three different types of sensors, among others; distance sensors (ultrasonic, PING), obstruction light sensor (LDR) and motion sensor (PIR, passive infrared). Data from the sensors is used as the input variables of fuzzy variable distance, obstruction of light and movement. The security system is realized by creating a device (appliance) which consists of several sensors and a seven segment connected to the port ATMega16 microcontroller. The data is processed in accordance with the fuzzy program embedded (embedded) into Flash PEROM ATMega16 microcontroller. Fuzzy Inference System is using reasoning method with 8 pieces Sugeno rules (rules) have been set. Results defuzzification (crisp output) be an integer and displayed on a seven segment as the presentation of security level. Figures 1 states "Safe", number 2 states "Alert" and number 3 states "Danger". Testing is done by trying 10 (ten) pieces possible conditions the action taken by the person to the object to be protected / secured. Variable input and output crisp values observed using the LCD (Liquid Crystal Display). This value is tested using the Matlab Fuzzy Toolbox, and then do the comparison. After testing, it did not find any difference between the two values is crisp output. Thus evident that the three types of sensors are able to serve as input variables of fuzzy logic. The combination of these three types of sensors able to detect any change in distance of an object that is protected / secured, detect people approaching and moving. Seven segment proved to be used as a viewer numbers 1,2 and 3 for the representation of the level of security. Microcontroller ATMega16 proven capable of running embedded fuzzy logic programs (embedded) in the Flash PEROM microcontroller. The system is designed can be used to complement conventional security systems that already exist. Key words: security, sensors, mikrokontroler, fuzzy logic, Sugeno, variabel, input, output, rules. ]]>
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