Introduction

Dial your number using DTMF phone or Cell phone from anywhere in the world and remotely turn on/off any of the 8 relays. The MCU on the interface senses Telephone ring, Automatic telephone pick up, and line hang up, displays information on a 16x2 LCD module and controls the relay switching. This interface uses the popular MT8870 DTMF decoder IC along with AT89S51 Microcontroller.



Features

• Outputs - Relays x 8

• Fully microcontroller based interface using AT89S51.

• Auto line pick up.

• On Board flash EEPROM that stores system Parameters and password and relay status (no require battery back up)

• User settable password for security.

• 16x2 Line LCD module to display Status and Error Message.

• Acknowledgement tone out put for the user.

-Introduction

　　　　　　　 Dial your number using DTMF phone or Cell phone from anywhere in the world and remotely turn on/off any of the 8 relays. The MCU on the interface senses Telephone ring, Automatic telephone pick up, and line hang up, displays information on a 16x2 LCD module and controls the relay switching. This interface uses the popular MT8870 DTMF decoder IC along with AT89S51 Microcontroller.



Features

•　Outputs - Relays x 8

•　Fully microcontroller based interface using AT89S51.

•　Auto line pick up.

•　On Board flash EEPROM that stores system Parameters and password and relay status (no require battery back up)

•　User settable password for security.

•　16x2 Line LCD module to display Status and Error Message.

•　Acknowledgement tone out put for the user.