dtmf dialer question
Hello. This weekend i built a phone dialer with the bs2. I made the daa that was in the schematic. I hooked it up to the phone line and could clearly hear the touch tones on another phone. The phone I was calling never rang. I also programmed in to dial 1 and the area code and it stop dialing after the first four digits and the operator answered!
Any ideas?
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Comments
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·· Are you using a BS2 or another model of BASIC Stamp?
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Chris Savage
Parallax Tech Support
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Chris Savage
Parallax Tech Support
Youu could try replacing the 1K resistor on the Stamp side of the circuit with something along the lines of 800ohms to compensate for the 220ohm resistors on the pin already.
I am attempting to do something similar (and a bit more extensive). Did you use the exact parts labeled in the diagram (I'm assuming we're all referring to NV #19, correct?)? Because when I checked the part numbers, at least the Sidactor turned up a part with a different voltage rating. Remeber, the article is 10 years old (phew...when I think about that, that's a really long time
And, I was wondering if someone could point me to some simple ring-detector circuits so I can recieve incoming calls to the Stamp...
Thanks
Rafael
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