Commonly Used RS-232 Serial Port Cables - This document includes information how to make common wires for RS-232 connections. I have shown pinouts for standard 25 pin connection and de-facto 9 pin connector used in PCs.
Read more at: http://www.epanorama.net/documents/pc/rs232cables.html __ Designed by Tomi Engdahl
Design a Visible Optical Link for RS-232C Communications - 01/09/03 EDN-Design Ideas Embedded processor directly drives LCDThe design in Figure 1 is a visible optical link for those who need to see the transmitted data. An isolation figure ofthan 5000V is a bonus. Tests of the system used the COM input of a data-acquisition system, as well as a standard PC's COM port. The MC1489 converts the RS-232C data to TTL signals__ Circuit Design by Shyam Tiwari, Sensors Technology Ltd, Gwalior, India
Dual PICAXE Infared Data Communication - What's this? Twin Picaxes? Is this Stan's idea of an April Fools Day Joke? Maybe he's just seeing double ___ SiliconChip
Dual-voltage regulator meets USB-power needs - 19-Aug-04 EDN-Design Ideas This design idea stems from the limited availability of IC voltage regulators that can meet key USB-power specs, coupled with the need for turn-on sequencing and rise-time control at each output. As always, for PC-related designs, minimum cost is a primary motivation. USB specs require all loads to limit inrush current to less than 100 mA plus 50 µC of charge when powered on__ Circuit Design by Wayne Rewinkel, National Semiconductor, Phoenix, AZ
Efficient All-In-One USB Power Management IC Solution - DN1008 Design Notes___ Linear Technology/Analog Devices
Ethernet 10BaseT simulator jig yields zero emissions - 10/22/98 EDN-Design Ideas (File has several circuits, scroll to find this one) A test jig (Figure 1) is a valuable tool because it evaluates RF emissions from Ethernet unshielded-twisted-pair (UTP) 10BaseT LAN-interface devices without contaminating the measured results with its own RF emissions. When an RF-emissions-measurement lab tests a multiport, UTP 10BaseT Ethernet device for compliance with FCC-radiated emission limits, the test is meaningful only if the device transmits data packets from all 10BaseT ports. __ Circuit Design by Glen Chenier, Fujitsu Network Communications, Richardson, TX
Extending the Applications of 5V Powered RS-232 Transceivers - DN14 Design Notes___ Linear Technology/Analog Devices
Get Power Out of PC Parallel Port - An article which includes circuits, shares how to us a parallel port to connect to a very wide selection of devices like software protection dongles, removable disks, modems, network adapters, printer sharing units, parallel port extenders, soundcards, electronic telecard readers and many circuits. __ Designed by Tomi Engdahl
High Efficiency Adaptable Power Supply for XENPAK 10Gb/S Ethernet Transceivers - DN295 Design Notes___ Linear Technology/Analog Devices
Humidty Sensor to Data Aquisition System Interface - The circuit shown in the schematic features zero drift operational amplifiers (LTC1250 and LTC1050) and a precision instrumentation switched capacitor block (LTC1043). This design will maintain excellent DC accuracy down to microvolt levels. This method was chosen over the use of a true RMS-to-DC or log converter because of __ Linear Technology/Analog Devices App Note, Mar 16th 2011
Interface a Serial 12-Bit ADC to a PC - 10-Jul-03 EDN-Design Ideas Over the years, IC manufacturers have devised various ways of effecting interfaces and paying special attention to reducing the number of ICs' interface-I/O pins. The MAX187 is one such device, a 12-bit A/D converter. You can create an interface to this ADC using serial data- communications techniques__ Circuit Design by DS Oberoi and Harinder Dhingra, GCET, Jammu, India
Isolated RS232 for PIC16F84 - Connect serial transmit bit of the transformerless supply PIC16F84 circuit with COM1 through the use of isolation device. Protect your notebook from direct connected to power line. __ Designed by Wichit Sirichote
Low-Cost RS-232C Multiplexer Serves as Multiport Adapter - 03/01/96 EDN-Design Ideas 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.__ Circuit Design by Jerzy R Chrzaszcz, Institute of Computer Science, Warsaw University of Technology Warsaw, Poland
LTC1387: 5V RS-232/RS485 Multiprotocol Transceiver - DN176 Design Notes___ Linear Technology/Analog Devices
LVDT Signal Conditioning - An LVDT transformer is exited with a fixed frequency sine wave. The distance of displacement of the movable core will change the amplitude of the transformer output which is is converted to a dc voltage by the LT1967 True RMS converter. The direction of the core movement is indicated by the phase shift of the sine wave and is detected by a simple phase comparator circuit. __ Linear Technology/Analog Devices App Note, Mar 16, 2010
PC Monitors two-way RS-232 transmission - 02/01/01 EDN-Design Ideas The goal of monitoring transmission in a data link is obvious: You want to know the contents of the data, when it was sent, and by whom. If one of the communicating parties is a PC or another user-programmable controller, then you can modify parameter settings or, at worst, change transmission routines to generate log files or perform other actions. __ Circuit Design by Jerzy Chrzaszcz, Warsaw University of Technology, Poland |