OY2L Member Jul 10, 2008 #1 If i need to use a 16F628 as a DTMF dialer may i use a crystal or is the internal oscillator stabil enough for it?
If i need to use a 16F628 as a DTMF dialer may i use a crystal or is the internal oscillator stabil enough for it?
Nigel Goodwin Super Moderator Most Helpful Member Jul 10, 2008 #2 OY2L said: If i need to use a 16F628 as a DTMF dialer may i use a crystal or is the internal oscillator stabil enough for it? Click to expand... The internal oscillator should be stable enough, DTMF doesn't require absolute accuracy.
OY2L said: If i need to use a 16F628 as a DTMF dialer may i use a crystal or is the internal oscillator stabil enough for it? Click to expand... The internal oscillator should be stable enough, DTMF doesn't require absolute accuracy.
Gayan Soyza Active Member Jul 11, 2008 #3 You could also use pulse dialing instead of tone dialing which were used in early years.
OY2L Member Jul 11, 2008 #4 Yes i know Gayan, i have a asm file with pulse dialing but i better like DTMF,