S saran New Member Dec 4, 2006 #1 i want to know how a dtmf code(dtmf generated code) is transmitted to dial a telephone number, or how a call is made with dtmf code is on the output pin , kindly help me thank u
i want to know how a dtmf code(dtmf generated code) is transmitted to dial a telephone number, or how a call is made with dtmf code is on the output pin , kindly help me thank u
Analog New Member Dec 4, 2006 #3 Checkout the Holtek 9200B. I use it quite a bit and it works great in transmitting and generating DTMF. HTH **broken link removed**
Checkout the Holtek 9200B. I use it quite a bit and it works great in transmitting and generating DTMF. HTH **broken link removed**
N NorwegianFunk New Member Dec 4, 2009 #4 I used a TCM5089 IC, which is a DTMF encoder, in conjunction with a pic and a 4x4 matrix keypad. http://www.datasheetcatalog.org/datasheets2/33/339125_1.pdf
I used a TCM5089 IC, which is a DTMF encoder, in conjunction with a pic and a 4x4 matrix keypad. http://www.datasheetcatalog.org/datasheets2/33/339125_1.pdf