CD-ROM
Pembuatan bel sekolah multifungsi menggunakan mikrokontroller sesuai dengan inputan dari pengguna (CD)
The progress in technology particularly in the field of electronics has now been bringing any changes and advances for human live.the construction of this tool was to make operators easier and alleviate them in controlling automated scheduled school bell, such that the student do not get difficulty in learning about the teory and technology of microcontroller, for thereby applying one of applied technologies in their class.
During the planning and testing of the entire system it was known that AT89S51 microcontroller is used due to its more flexibility and the bell will active when the time unit already entered Via the keypad is the same as one found in RTC DS12C887, the electric bell will active the period of high input.
Within this tool, AT89S51 microcontroller is used as the controller, keypad serves the function as data input, 2x16 –sized LCD is as the schedule display. In order to know the voltage portion of 12 Volt in the same direction for the driver ND 5 volt minimum system, the length of schedule in a day can be programmed as much as seven time tables and applies three patterns of the bell ring.
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