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.

New Folder
..........\PCB Layout
..........\..........\Home Automation system PCB layout.pdf
..........\Report
..........\......\CELLPHONE OPERATED HOME AUTOMATION SYSTEM.doc
..........\......\New Microsoft Office PowerPoint Presentation.pptx
..........\......\Report.pdf
..........\Schematic
..........\.........\Control unit.pdf
..........\.........\DTMF Decoder and EEPROM.pdf
..........\.........\Relay Driver and Relays.pdf

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