dear friend betwixt,
thx for the ckt.
in my project here, i hv to make a motor run via the command form the telephone line.
my project is intended to be connected in parallel to a normal telephone.
when some one will ring the number on which this project is connected, it will start counting the rings,
and at the 6th ring, it will offhook the telephone line and at that instant, the caller party will dial a say 3 digit code ( dtmf) and if the code is correct, it will run a motor.
( the code comperision and giving the signal to make the motor on will be given by the micro controller) -- and thats not the issue for me.
in my development,
i hv almost made a ring detector, and i have a circuit already designed for -- "telephone offhook detector" but the offhook detector i have has the work to make an led on when ever the telephone is offhook.while in my project i need to -- make the telephone "offhook"
and i am confused -- how to do it.
i think shorting the line with a resisrot of abt 180 ohms .. makes the tel line to produce the offhook condition .?
plz enlighten my mind..
-Awaiting rony.