Ok, this sounds like a hacking task but I can assure you it is a project that is taking place at my university. The task is to create a hardware (and software) apparatus that non destructively attaches to a phone line. This uses a dual tone multi frequency dialing system (as well as ADSL to be filtered).
I would like to talk about my approach to this task. There are areas that I am not sure about.
I guess I need to use some form of Arial so that the voltage signals can be sent to my circuit. I would like this Arial to connect to an arduino so that the voltage signals can be sent to an input pin on the arduino. I plan to use Matlab in a "hand shake" form with arduino so that the voltage signals can be transmitted and received. Then filtering would take place and would try to get the values from the Fourier transform graphs in Matlab and the two spikes should correspond to the row and column frequency values from the number pressed. The last stage is to display the numbers in the serial monitor in the arduino platform. I know this is vague but does it seem possible? Is there any important steps that I have missed out?
I would like to talk about my approach to this task. There are areas that I am not sure about.
I guess I need to use some form of Arial so that the voltage signals can be sent to my circuit. I would like this Arial to connect to an arduino so that the voltage signals can be sent to an input pin on the arduino. I plan to use Matlab in a "hand shake" form with arduino so that the voltage signals can be transmitted and received. Then filtering would take place and would try to get the values from the Fourier transform graphs in Matlab and the two spikes should correspond to the row and column frequency values from the number pressed. The last stage is to display the numbers in the serial monitor in the arduino platform. I know this is vague but does it seem possible? Is there any important steps that I have missed out?