No abstract

Research to find new energy source is still an intensive work by researchers in this field. One of the energy sources with no negative impact to environment is solar energy. Solar cell is used to convert solar energy to electrical energy. The electrically powered solar cell in direct current (DC) power is not suitable for our daily office equipment since they need the alternating current (AC) power. This research has succeeded in realizing a solar cell automation tool based on Arduino Uno with input from solar energy, from which output AC voltage can be used for the needs of household appliances and office equipments. Output power of this tool is approximately 700 W, which can turn on the lights, charge the hand phones, laptops, and so forth.

As an example of using the Arduino Uno microcontroller which is used as a door security system controller using a smartphone. Many types of security are offered and used, such as alarms that use sound as an indicator which is standard security from an alarm, this alarm sounds through a speaker (speaker) that is installed on a door that serves to provide information to homeowners and the surrounding environment that the alarm is active. In this study, using an Android smartphone as a tool to operate the door and activate the alarm automatically at the door. For the research that the authors make this will be different from the previous research. Where the tool designed using micro controller (Arduino Uno) is used to turn on the buzzer as a door alarm automatically and can open and close the door, which will be done on an Android smartphone using bluetooth media. Bluetooth is wireless communication that is used as a communication link between an Android smartphone and Arduino Uno.