TRANSMITTER_FOR_REMOTE_TERMINAL

Published:2009/7/5 22:45:00 Author:May | From:SeekIC

Consists of AY-5-1013 UART attached to keyboard, with twisted-pair cable running to receiver unit at computer location. Coaxial extension cable for monitor is only other connection to computer system because terminal has own power supply. Transmission is in one direction only. NE555 oscillator is set at 1760 Hz ± 1% with aid of frequency counter, for 110-b/s serial rate. IC6 is 5-V National DM8830 differential line driver or equivalent. Pin 14 of IC6 goes to +5 V and pin 7 to ground.-S. Ciarcia, Come Upstairs and Be Respectable, BYTE, May 1977, p 50-54.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Communication_Circuit/TRANSMITTER_FOR_REMOTE_TERMINAL.html

Print this Page | Comments | Reading(3)