<h2>About</h2>
P2Dgizmo stands for Pulse to DTMF gizmo.

It is a device which teaches a Plain Old Telephone to "sing" modern DTMF.<br>
The original ZIP-file can be downloaded and the author also has a demo video available on

[Notes] -:- [Software]

<h3>Schematics</h3>
<b>Note: the schematics as shown below will not work on European telephone lines.<br>
because these lines switch polarity at the end of each call.</b><br>
(Click on the image below to get a bigger picture)<br>
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