Bel otomatis Virtual Dual Channel berbasis Android

In education institution, both formal and informal like Pesantren, bell is used as alert of the starting and ending time of learning or studying, or activity that is done together. Long time ago, the alert used is only a simpe bell. As the development of science, there are many automated bell invented. SDIT Firdaus is one of Islamic Elementary School which is located in Mojokerto city and become the implementation site of this research result. The school has 12 classes and has only 1 canteen with limited capacity that make the school separate the break time into 2 shifts in order that the service of the student is optimal and the student is not too crowded. This school also needs to play some verses of Al-Quran in the class that is having break time to speed up memorizing Al-Quran. The time and sound management should be easy to be configured for future schedule change. The manual alert has various accuracy rate because of the manual process from the operator. In this research, the making of automatic dual channel school bell based on android phone is discussed to solve the problem of SDIT Firdaus, which are playing scheduled alert of 2 different break time, praying and the use of canteen to optimize the service and other aims.