A Ajit New Member Mar 30, 2003 #1 Hi , Can anyone suggest how to interface the DTMF output of HT9200 IC to the telephone line ...... Thanx - ajit
Hi , Can anyone suggest how to interface the DTMF output of HT9200 IC to the telephone line ...... Thanx - ajit
kinjalgp Active Member Mar 30, 2003 #2 You can use opto-isolator, isolation transformer or a bridge rectifier to interface your chip to telephone line. Line of warning: Attaching any device to telephone line without permission is illegal.
You can use opto-isolator, isolation transformer or a bridge rectifier to interface your chip to telephone line. Line of warning: Attaching any device to telephone line without permission is illegal.