Maker Pro
Maker Pro

Telephone Dialer

R

Richard The Troll

Jan 1, 1970
0
Hi,

Do anyone know how to creat a telephone dialer (interface with 2 wires)
with a DTMF generator?
Probably.

Thanks

You're welcome. :)
 
J

Josh

Jan 1, 1970
0
There are two ways of doing this, the first which I don't have much
experience with goes like this. Normally accross a telephone line there's
50volts, you just stick a bit of resistance between the two wires so the
voltage drops to a few volts and chuck a signal down it. The other way is to
stick a transformer accross it (with a resistance on it's coils enough to
drop the voltage to a few volts) and stick your signal on the other side.

Josh
 
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