The design is the switchboard of the wireless anti-theft alarm system. The wireless anti-theft alarm has two parts. One is switchboard. The other is separate computer. The system is used in VGA line of alarm of projector. When the separate computer detect the VGA lost, the switchboard can receive the alarm information. The switchboard alarms and display the information.
The core of the wireless anti-theft alarm switchboard is design in PIC16F73 microcontroller. The system makes the wireless receiver gain the radio wave information, and mediates it into digit information received through the asynchronous serial port of the microcontroller. It use the liquid-crystal display(LCD) display the related information and alarmed in buzzer. The system has the advantage of simple, practical and less-cost.
The wireless receiver module is the super-regeneration circuit. The mediation is AM; The LCD are ten segments of liquid-crystal display, This system only uses the four segments of the LCD. There are two byte of display alarm. The other two display is separate computer number.