Oct 13, 2010 #1 S sreein Junior Member level 1 Joined Oct 11, 2010 Messages 15 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Location india Activity points 1,394 how can interface telephone line with mt 8870?
Oct 13, 2010 #2 N nikhilele Advanced Member level 3 Joined Jan 11, 2006 Messages 805 Helped 101 Reputation 202 Reaction score 76 Trophy points 1,308 Location Bangalore India Activity points 6,376 mt8870 is easily interfaced with phone via rc coupling ckt ... just go through this ckt Attachments dec.gif 11.4 KB · Views: 595
Oct 14, 2010 #3 S sreein Junior Member level 1 Joined Oct 11, 2010 Messages 15 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Location india Activity points 1,394 thanks But i need to interface mt8870 with a telephone line that's voltage vary above 100Volt during ringing.This may damage my circuit,how can i prevent this?
thanks But i need to interface mt8870 with a telephone line that's voltage vary above 100Volt during ringing.This may damage my circuit,how can i prevent this?
Oct 14, 2010 #4 nandhu015 Advanced Member level 5 Joined Feb 11, 2006 Messages 1,960 Helped 300 Reputation 600 Reaction score 222 Trophy points 1,353 Location India Activity points 9,924 Disconnect the mt8870 circuit (using a relay) till the phone is off hook.
Oct 14, 2010 #5 S sreein Junior Member level 1 Joined Oct 11, 2010 Messages 15 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Location india Activity points 1,394 Please provide that circuit
Oct 14, 2010 #6 T tyty123 Newbie level 2 Joined Jun 12, 2007 Messages 2 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,288 You can use another schematic, without a relay. I used this schematic and it works perfectly. ---------- Post added at 22:22 ---------- Previous post was at 22:21 ----------
You can use another schematic, without a relay. I used this schematic and it works perfectly. ---------- Post added at 22:22 ---------- Previous post was at 22:21 ----------
Oct 15, 2010 #7 S sreein Junior Member level 1 Joined Oct 11, 2010 Messages 15 Helped 1 Reputation 2 Reaction score 1 Trophy points 1,283 Location india Activity points 1,394 thanks... i will try it ..