Saturday 27 August 2016

Password protected system with AVR using DTMF

Password protected system using DTMF

Hello guys, this project is about password protected system using DTMF module. By using a predefined number we can make output either high or low by using the three digit code.
The codes can be changed in the program.

Components required:

  • Atmega 16A
  • USBasp programmer
  • AVRdudes (for burning hex file)
  • AVRStudio 4
  • Compiler used: GCC
  • DTMF module
  • 3.5 mm audio jack

FOR OUTPUT LOW CODE IS str1="248"
FOR OUTPUT HIGH CODE IS str2="842"

Connections are as follows:

Q0-PD0
Q1-PD1
Q2-PD2
Q3-PD3

Output is from: PB0.

Check out the diagram:

Password protected system with AVR using DTMF


Click here to download

Hope you had enjoyed the tutorial.

Stay tuned for more updates 


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