dtmf shield

Posted on Feb 5, 2014

This is the working prototype. The eagle files have some minor changes made to it. Fixed some mistakes and re-positioned a few parts. This one is for the phreakers of the past. A simple Arduino shield to decode DTMF tones using an audio input. It can easily be hooked up to a cell phone or..

dtmf shield
Click here to download the full size of the above Circuit.

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