CD-ROM
Perancangan dan pembuatan kunci pintu berkode dengan DTMF berbasis mikrokontroler (CD)
At this modern period, especially in technology make everything simple for used because of that, editor have idea for design and make key code with DTMF.
This tool is designed by various modul and main component as condensor mic, IC MT8888, AT89C51, motor driver, stepper motor an other support component. The function of condensor mic as input DTMF code from push the bottom keypad in handphone. After enter of code DTMF, that code being detect by DTMF detector if code was match then microcontroller give instruction to motor driver to move stepper motor for open closed door key.
By using microcontroller, can apllication of making code key with DTMF(Dual Tone Multiple Frequency)
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