Based on the telephone network remote control home appliances and anti-theft system design (1)

0 introduction

Telephone and mobile phone is the most frequently used communication tool, if you can make the best use of the telephone network and electronic technology, wireless communication, computer science, and technology together, you can let us away can easily grasp the situation at home.

Therefore, if we can set up a convenient and practical home automation and anti-theft security system to provide a simple way of managing the home environment, home automation, anti-theft security and energy savings.

This study uses the public telephone network via the dual-frequency receiver IC (KT3170) connected to a single chip (EM78P451P), through the single drive external circuits and home electric appliances, door and window monitoring sensor connection, and then use EEPROM (93C66) memory set phone and mobile numbers, via the telephone networks to control home appliances and anti-theft security of bi-directional monitoring system.

1 system planning and design

Figure 1 to the telephone network to appliance control and anti-theft monitoring system hardware architecture diagram, the main use of single-chip microcontrollers for central processing module, combined with the public telephone network system, home appliance load control and anti-theft monitoring function.

1.1 hardware structure

Appliance control and anti-theft monitoring system for most of the functions in the central processing module.

Central processing module, which in practice is a microprocessor, this system features designed with Assembly language.

4 × 4 keypad as appliance control and anti-theft monitoring system input channel, such as phone number or cell phone number of the set, browse, etc.

Flat Panel LCD monitor that has set the phone number or cell phone number, etc. Use EEP-ROM (93C66) can store 20 Group wishes to inform the telephone number. Phone automatically dial-up hardware architecture as shown in Figure 2.

Telephone line signal conditions as follows:

① telephone line in a wait state, its voltage of 45 V ~ 55 V.

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