Hello,
I finally got my circuit working... well almost. I use a pic chip with picbasic pro, I output DTMF and this goes through a filter shown in picbasic manual:
thanks k
Hello,
I finally got my circuit working... well almost. I use a pic chip with picbasic pro, I output DTMF and this goes through a filter shown in picbasic manual:
thanks k
Assuming you have the correct voltages around the PIC, you have something seriously wrong! It almost sounds like you are some how getting part of the phones voltage in there. I don't know what the voltages are these days, but it use to be
50 volts on the line while on hook. Maybe you should be using an isolator.
I think I might got the probe switch to 10x instead of 1x.. that would explain. I will check it once I get home...
I think I might got the probe switch to 10x instead of 1x.. that would explain. I will check it once I get home...
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