D 2012-12-02T23:05:41.438
L P2Dgizmo
P e226a3792b52e35de4bafa27eb8fe696d80a0c3d
U jfk
W 721
<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 [http://truecard.biz/temp/PulseToTone_2012_01_22.zip|here], and the author also has a demo video available on [http://www.youtube.com/watch?v=ZLoQ5UA1tvc|youtube]

[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>
<a href="../P2D/doc/tip/Schematic_v1-0.png"><img src="/doc/tip/Schematic_v1-0.png" width="800" height="600" /></a>

Z d75a5ee9cb40a3f84102061bee598308