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Computer Cable Designs
Computer Cables#'s - C        D - K        L - Q        R        S - T        U - Z

Last Updated on: Tuesday, October 24, 2017 02:54 PM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

RDS Coder Board using ATmega32 This board is a RDS coder using an ATMEL AVR ATmega32.  This board can be controled by a RS232 link, USB interface or SPI.  TA data is displayed wiyth a LED and can be controled by :, Hardware input, RS232, USB, SPI (not yet implemented) __

RS 232 to TTL converter tests UARTs with a PC 05/29/08  EDN-Design Ideas A simple RS-232-to-TTL converter tests UARTs using a PC's serial port for power__ Circuit Design by Matthieu Bienvenüe, Malissard, France

RS232 Booster RS232 ports of modern laptops are not always complying with the original RS232 standard.  If RS232 levels are expected to be +/- 12 volts, most of the time laptops RS232 ports produce in fact +/- 5 volts levels.  For most peripherals,  __

RS-232 Data Switch In 1989, at university, after the success with submitting a writeup about my homemade 68008 single-board computer as a co-op work term report, I hatched the idea of building another piece of gear that I wanted anyway, and submitting it as an EE499 project.  EE499 was the course code __ Designed by Markus Wandel

RS232 DB-9 Switch Simple hardware expands COM1 to COM1/1 and COM1/2;  RS232 DB-9 Switch to Flip Between Two Serial Ports __ Designed by Wichit Sirichote

RS-232 dB-9 Switch-To-Flip Between Two Serial Ports got a problem with my notebook, because it has only COM1.  My programmer board, Easy-Downloader must use serial port and the application board also needs to communicate via the same serial port.  I do remembered I have to swap DB9 connector of both devices many times.  So I spent 30 minutes built above simple hardware.  Of course __ Designed by Wichit Sirichote

RS-232 Interfaces for 3.3V Systems DN75 Design Notes___ Linear Technology/Analog Devices

RS-232 Laser Transceiver Laser based projects used to be expensive, until the development of solid state lasers.  This project is designed for the entry level laser experimenter.  The circuit allows any two computers with serial (RS-232) communication capability to communicate over 200 meters using a laser beam.  A low cost transmitter only circuit is also presented here for use in one way communication and other laser based projects __ Designed by shaunwilson19 @ yahoo.com

RS232 Level Conversion RS232 Level conversion __

RS232 Level Converter This converter comes as an aid to STK500 board.  It uses the famous MAX232 for the signal level translation.  It requires a 1 to 1 rs232 cable for the connection with the PC. __ AVR Projects Dim

RS-232 Line Monitor & Loopback Cables If you have problem with RS232 cabling, your best "emergency" tool may be a breakout box (sometimes called an LED box).  The normal units only come in the DB25 size, but with a couple of DB9 to DB25 adaptors, they can be used with DB9 cables as well.  The units have an LED for each signal line in the cable, and the LED lights green or red dependent on the signal state. __ Airborn Electronics, Australia

RS-232 Overvoltage Protections RS-232C serial port lines are quite prone to be damaged by overvoltages.  The damaged to computer serial ports have become more and more expensive to replace because of higher intergaration: usually you have to buy new motherboard if one serial port in it gets broken.   So it is wise to use some extra protection in situations where overvoltages surges are quite propabe and repairing gets expensive.  For examples of this type of situations are long serial port lines side the building and situation where the computer is connected to ungrounded outlet or the electricity distribution wiring is is not well organized. __ Designed by Tomi Engdahl

RS-232 Protocol Analyser In need for a cheap but effective RS-232 Protocol Analyser? Just make your own Y adaptor to enable the logging or display of data transmitted and/or received in ASCII, Hex, Decimal or Hex-Dump formats.  A configuration file is included to allow quick setup and analysis. __ Designed by Craig Peacock

RS-232 Serial Port Buffer This is a simple serial port buffer circuit I designed for a friend to speed up his SLIP connection in campus computer network "TRINET" of Helsinki University of Technology. The problem in the network was that the RS232 commections from rooms to terminal server were long and made of bad quality wiring. __ Designed by Tomi Engdahl

RS232 Serial Port PIC Programmer PIC Programmer is an essential tool if you wish to learn or build projects with Microchip PIC Micro Processors.  This programmer is built using Free Windows Software called WinPicProg and other similar software from PICALLW or Oshosoft __

RS232 Serial to USB Converter This is simple RS232 Serial to USB Converter that doesn’t need any further explanations.  You can use it for any projects that might need it.  Diagrams for USB and DB-9 female connectors are provided. __

RS-232 Surge Protection RS-232C serial port lines are quite prone to be damaged by overvoltages.  The damaged to computer serial ports have become more and more expensive to replace because of higher intergaration: usually you have to buy new motherboard if one serial port in it gets broken.   So it is wise to use some extra protection in situations where overvoltages surges are quite propabe and repairing gets expensive.  For examples of this type of situations are long serial port lines side the building and situation where the computer is connected to ungrounded outlet or the electricity distribution wiring is is not well organized. __ Designed by Tomi Engdahl

RS-232 to TTL Cable A common feature found on many Microcontrollers is a serial port (often called a SCI, COM, or ASYNC port).  I am going to use the term SCI as a short cut to mean the serial port on your Microcontroller.  Quite often, the SCI on your Microcontroller will generate the appropriate LOGIC signals to communicate with another chip.  They do not, however, generate the proper voltages required for connecting to RS-232 devices.  This article is going to describe the differences between RS-232 and TTL, and how to build a converter so you can connect your Microcontroller to an RS-232 compatible device, such as the COM port on your PC. __ Designed by Kevin Ross

RS-232 to Wireless Instrument Data Channel This is an adapter that allows a terminal to communicate via a 100 MHz data channel with peripherals on the same desk top.  Keystrokes from the terminal are are received through the RS-232 connection and sent through the 100 MHz RF data channel.  See the page, Digital Wireless for the Desktop, on this site, for the basics of the transmitter, receiver, and data format.  The reason I made this was to make a simple method of switching between instruments on my desktop.  I was staring to accumulate a number of microcontroller-based devices that I want to be able to switch my computer among quickly and this provided the simplest desktop networking solution I could think of. __ Designed by Dick Cappels

RS-232 Transceiver with Automatic Power Shutdown Control DN30 Design Notes___ Linear Technology/Analog Devices

RS-232 Transceivers for Hand Held Computers Withstand 10kv Esd DN64 Design Notes___ Linear Technology/Analog Devices

RS-232 Xlater A simple terminal program on a PC can have a lot of uses.    The hang-up is that most of those uses involve communicating with a device running on 5 volts.    I've done several schemes over the years but this one is my favorites. __ Designed by Luhan MonatMesa Arizona

RS-232/485 converter has automatic flow control 04/12/01 EDN-Design Ideas 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 multiple circuits, scroll to find this circuit04/12/01 EDN-Design Ideas 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 multiple circuits, scroll to find this circuit by  John Howard, Kw Aware, Ventura, CA

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, __ Contact: void @ blankfrank.co.uk

RS-232C handshake lines transfer data frame 10/23/97 EDN-Design Ideas The asynchronous RS-232C interface is a simple, low-cost option for interconnecting processor-based systems, but this character-oriented interface supports no direct mechanism to transfer variable-sized messages as self-contained data packets.  However, you__ Circuit Design by SK Shenoy, Naval Physical & Oceanographic Lab, Kochi, India

RS-232C has galvanic isolation 04-Feb-99 EDN-Design Ideas NOTE :  File has several circuits, scroll to this one.  Galvanic, or electrical, isolation is a well-established technique for noise reduction and works best in computer and industrial systems in which noise can seriously affect data transfer.  Isolation removes ground-loop currents and their associated noise voltages from data lines__ Circuit Design by Ioan Ciascai, REI Data, Napoca, Romania

RS232c Interface Meets Telecommunications Safety Specs 09/28/95 EDN-Design Ideas RS-232 isolation circuit.__ Circuit Design by Martin O'Hara, Newport Components, Milton Keynes, UK

RS232c Level Converter A circuit for RS232C level converter, MAX232 and DS275 __ Designed by Wichit Sirichote

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 __ Designed by Wichit Sirichote

RS232c Line Driver IC Drives Power MOSFETs 10/24/96 EDN-Design Ideas Easy to effect an interface between power MOSFETs and TTL circuits.__ Circuit Design by Santosh Shetty, NCRA, Pune University, Pune, India

RS-232C link Monitors animal activity  11/06/97 EDN-Design Ideas 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 periods and around the clock.  The circuit in__ Circuit Design by W Stephen Woodward, University of North Carolina--Chapel Hill

RS-232C port scans remote keypad 12/04/97 EDN-Design Ideas 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 the system hardware.  If you have__ Circuit Design by SK Shenoy, NPOL, Kochi, India

RS232C Powers & Reads 8 Bit Switch Matrix 04/11/96 EDN-Design Ideas The circuit in Figure 1 provIdeas 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 modify the circuit to read more switch inputs.  The heart of the circuit is a 74HC165 8-bit, serial-output shift register.  It's important that you use either this register or a similar one from a low-power IC family.  The shift register has eight parallel-input pins that receive their drive from an 8-bit DIP-switch matrix.__ Circuit Design by BR Dhananjay Gadre, IUCAA, Pune, India

RS-232-to-RS-232 Port Powered Optical Isolator Brochure with schematic in PDF format___ BB Electronic

RS485 Transceivers Operate at 52Mbps over 100 Feet of Unshielded Twisted Pair DN168 Design Notes___ Linear Technology/Analog Devices

RS485 Transceivers Reduce Power & EMI DN102 Design Notes___ Linear Technology/Analog Devices

RS485 Transceivers Sustain ±60V Faults DN203 Design Notes___ Linear Technology/Analog Devices

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 __ Designed by Peter Jakab


Computer Cables#'s - C        D - K        L - Q        R        S - T        U - Z

 


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