To ask an engineering question please visit our forum site at Eng-Tips.



Browse our archive of questions and answers below or to access our old forum database of over 10000 questions and answers please visit the old Ask@ forum.


Matrix Keypad with MT8870
Last Post 15 Apr 2013 08:39 AM by jwd217. 1 Replies.
AddThis - Bookmarking and Sharing Button Printer Friendly
  •  
  •  
  •  
  •  
  •  
Sort:
PrevPrev NextNext
You are not authorized to post a reply.
Author Messages Not Resolved
Mridul Agarwal
New Member
New Member
Posts:1

--
13 Apr 2013 07:26 AM
    Hi!
    I have a circuit which have two wires for input , so can anyone tell me how to connect a 4*4 Matrix Keypad with it . Circuit can be found at:-
    http://www.instructables.com/id/Cel...LANDROVER/
    jwd217
    New Member
    New Member
    Posts:35

    --
    15 Apr 2013 08:39 AM
    This circuit expects to have the keypad tones of a typical phone key pad entered on the input labeled "TIP" with "RING" being common. If the Matrix Keypad you have does not produce the phone keypad tones then you would need add that capability.

    Wikipedia has an article titled "Telephone kaypad" that list what frequenies those tones are.
    You are not authorized to post a reply.