Bluetooth AC Controller is an Android application developed by c2design that allows you to control your home appliances with ease. The program is designed to work with Arduino Bluetooth (HC-06) and relay (KY-019) to control the appliances connected to 220V. With this app, you can assign On/Off and Interval time easily.

Before running the app, you need to activate Bluetooth pairing between your smartphone and HC-06 Bluetooth module. It's important to note that there is a risk of short circuit or electric shock when connecting the KY-019 relay, so be careful.

If you're interested in the details of the Arduino source code and circuit, you can download them from the link provided. The app was developed with Delphi, and the source code is also available for download.

Overall, Bluetooth AC Controller is a useful application for those who want to control their home appliances remotely. It's easy to use and has a simple interface, making it accessible for anyone to use.