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RS-232/485 converter has automatic Flow control - 04/12/01 EDN Design Idea RS-485 communications can provide longer range and better noise
immunity than RS-232, as well as multidrop capability. Because it does not have separate transmit and receive
lines, RS-485 requires flow controlPDF contains multipl. . . [by John Howard, Kw Aware, Ventura, CA]
RS-232/DALI Bridge Interface - Application Note Published 26-Apr-02. . . [Microchip]
RS-232: Lowe Hf-225 Interface - If you have access to a Lowe HF-225 shortwave receiver, then you might be interested in
this page. If you don't, then you'd probably be better off leaving now. What follows is a project I completed
some time ago, which allows the Lowe HF-225 to be controlled from a PC, or other device with an available
RS232 port. The Rx has an input for a remote keypad, and, consequently, was begging for me to hook my PC up
to it. I don't feel the need to spell out the advantages, . . .
RS-232C circuit has galvanic
isolation - 02/02/99 EDN Design Idea (contains several designs,
scroll to find this one) You can obtain longer transmission distances with the RS-232C interface if you use
galvanic isolation between the two linked terminals. Galvanic isolation also eliminates problems arising from
disparate potentials between terminals. Using two MAX860/861 ICs and two TPL2200 optoisolators, you can
obtain galvanic isolation for three-wire transmission without external supplies (Figure 1). . . . [by Ioan
Ciascai, REI Data, Napoca, Romania]
RS232c Interface Meets Telecommunications Safety Specs - 09/28/95 EDN Design Idea RS-232 isolation circuit. . . . [by Martin O'Hara, Newport
Components, Milton Keynes, UK]
RS-232c Interface with Cop800 - Application Note. . . [National Semiconductor]
RS232C Level Converter - A circuit for RS232C level converter, MAX232 and DS275. . . [Wichit Sirichote, designer]
RS-232c Level Converter using
Transistors - There're many, who built the Easy
Programmer or C-52 EvaluationBoard, asking for the RS232C level converter chip, DS275. Many have changedto
MAX232 instead, because of not available in his home. Here is anothersimple and cheap circuit using small
signal transistor providing TTL toRS232C level converter. . . [Wichit Sirichote, designer]
RS232c Line Driver IC Drives Power MOSFETs - 10/24/96 EDN Design Idea Easy to effect an interface between power MOSFETs and TTL
circuits. . . . [by Santosh Shetty, NCRA, Pune University, Pune, India]
RS-232C link monitors animal activity - 11/06/97 EDN Design Idea A common need in biological experimentation is the ability to
unobtrusively monitor the activity of small caged animals, such as mice, rats, and rabbits, as they move
about their enclosures. This monitoring must be over long per. . . [by W Stephen Woodward, University of
North Carolina--Chapel Hill]
RS-232C Multiplexer Serves As Multiport Adapter - 03/01/96 EDN Design Idea Multiport RS-232C PC add-on boards are intended for intensive
multichannel communication. Therefore, each serial port has its own transmission controller. If your
application doesn't need interrupt-driven service, and polling the devices through RS-232C channels one after
another is sufficient, then you can use a single controller with switched input and output signals instead of
installing a costly multiport adapter. . . . [by Jerzy R Chrzaszcz, Institute of Computer Science, Warsaw
University of Technology Warsaw, Poland]
RS-232C port scans remote keypad - 12/04/97 EDN Design Idea In many embedded or control applications, you might prefer to
use a small, customized keypad with your PC-based system rather than a full-fledged alphanumeric keyboard.
You may also need to locate the keypad some distance from th. . . [by SK Shenoy, NPOL, Kochi, India]
RS232C Powers & ReaDS 8 Bit Switch Matrix - 04/11/96 EDN Design Idea The circuit in Figure 1 provides a remote menu-selection switch
matrix for PCs. It connects a linear, 8-bit switch to the RS-232C port; the RS-232C signal pins provide the
circuit's frugal power requirements. You can easily modif. . . [by BR>Dhananjay Gadre, IUCAA, Pune, India]
RS-232-to-RS-232
Port Powered Optical Isolator - Brochure with
schematic in PDF format. . .
RS485
Transceivers Operate at 52Mbps over 100 Feet of Unshielded Twisted Pair - DN168 Design Notes (Linear Technology). . . [Linear Technology]
RS485
Transceivers Reduce Power & EMI - DN102 Design Notes
(Linear Technology). . . [Linear Technology]
RS485
Transceivers Sustain ±60V Faults - DN203 Design Notes
(Linear Technology). . . [Linear Technology]
RS485-Like Multi-Drop Bus with Half Duplex Serial
Protocol - PBUS is an RS485-like multi-drop bus for
interconnecting PIC and other microcontroller-driven devices. Protocol and software is written by Jap. Just
include a separate pbus library file into your project and add your command handlers for the specific device
in a few lines. . . [Peter Jakab, Electrical Engineer, Engineer of Informatics]
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