O.O.  Fagbohun, F.O.  Edeko, 
    Development of a One Touch Information Relay System for Distress Calls-Digital Circuit Design,
    Asian Journal of Information Technology,
    Volume 9,Issue 3,
    2010,
    Pages 159-163,
    ISSN 1682-3915,
    ajit.2010.159.163,
    (https://makhillpublications.co/view-article.php?doi=ajit.2010.159.163)
    Abstract: The design of a one touch 16-bit information relay system digital circuit for distress calls is the focus of this research. The digital circuit consist of binary switches which forms the pre-coded digital signal required for serial information transfer with the use of a multiplexer. The circuit was analyzed with the use of Multisim-10 application software to assess its response to coded information.
    Keywords: Binary switches;multiplexers;multi-vibrator;binary counters;frequency;Nigeria