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Computer Interface Circuits

Computer Interface: 
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Last Updated: October 24, 2017 02:54 PM


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

S/PDIF & I2S Interface for a SigmaDSP Codec using the ADAV801/ADAV803 Audio Codec The ADAV801/ ADAV803 board is controlled using the printer port of a PC with its own software that can be downloaded from the ADI website.  The SigmaStudio software is used to program and tune the registers and SigmaDSP core in the ADAU1761.  The software for the ADAV801/ ADAV803 can also be downloaded from the ADI website__ Analog Devices from the Lab

S-52 Simple Circuit Microcontroller Learning Board  Simple hardware for beginner to learn 8051 microprocontroller, single side pcd with ISP loader designed by Prahlad Purohit from India.   __ Designed by Wichit Sirichote

Safely swap SCSI disk drives 09/30/99 EDN-Design Ideas When you insert an SCA2(single-connector attach] drive into a live backplane, the power supply's bypass capacitors in the drive  can draw huge transient.    __ Circuit Design by Ajmal Godil, Linear Technology Corp, Milpitas, CA

Sample Code for Interfacing Devantech CMPS03 to the Motorola 68HC11.   __ Designed by Wichit Sirichote

Sanyo 20EZ Monitor Schematic only, no circuit description included.   __ Contact: jrokweb @ san.rr.com

Satellite-dish command Decoder 03/04/04  EDN-Design Ideas By decoding the commands sent by a direct-broadcast satellite receiver that uses the DISEQC (digital-satellite-equipment-control] protocol, you can troubleshoot the commands or simply listen in.  Eutelsat Corp (www.  eutelsat.  com] offers __ Circuit Design by Mark Giebler, Oakdale, MN

Sawtooth Generator Spans a 70-Db Rang 07/07/94 EDN-Design Ideas The circuit in Fig 1 demonstrates a simple method for generating a voltage-programmable sawtooth waveform having a dynamic range greater than 70 dB.  In addition to the sawtooth waveform, the circuit also produces corresponding triangle- and square-wave outputs.  The three ICs and associated components __ Circuit Design by Paul Hendricks, Analog Devices, Wilmington, MA

SB-Bus Drivers Introduction ands Just in case you didn't know by now, the SB-Bus enables you to connect up to 125 different SB-Bus devices to one standard serial port on any type of computer.  In fact the SB-Bus is nothing more than a special protocol (a set of rules) and a certain way to distribute the electrical signals

Scalable latch requires no capacitors or clock 08/19/04  EDN-Design Ideas Circuits that latch one-of-N switches usually use a digital approach.  Such circuits are often useful in human-interface situations, such as audio-mixing consoles, video-feed selection, or current-loop-control redundancy systems.  In __ Circuit Design by Robert Most, Dow Corning S&T Electronics, Midland, MI

Scalable Noise Generator Using some shift registers and exclusive OR gates, it is possible to construct what is known as a psuedo random code generator.  Depending on what taps are used on the shift register, a sequence of up to 2^n-1 numbers can be generated before the__ Radio LocMan

Scenix & PIC Programmer I was trying to think of a suitable name for this project, and after literally seconds of careful deliberation, I gave up and decided to call it Fluffy.  Sorry.  Anyway, Fluffy is a SX programmer for people who have already experimented with PIC chips, and want to try out the Scenix SX family.  I built Fluffy because I wanted to experiment with the SX's, but didn't want to spend $300 or so bucks on the official development system.  To build it, you will need a PIC16F84   (a 16C84 will probably also work, but I don't have any to test!).  Note that this implies you should already have a working PIC programmer.  If you don't, you might want to check out COM84, or any of the multitude of free, cheap PIC programmers available on the web.   __ Designed by Ben  last name not found

Scheme autodetects baud rate 07/20/00 EDN-Design Ideas The popularity and easy access of RS-232 ports lend them to many communication projects.  You can use a port "as is" or as a tiny parallel port when the exchange uses only control lines.  Before the asynchronous serial-data transfer b __ Circuit Design by Alexander Eisen, State University of New York, Buffalo, New York

Scheme implements multiple output ports 02/16/98 EDN-Design Ideas In P/C systems, you sometimes need to use many output ports and update all the ports simultaneously.  For instance, in systems that use multiplexing techniques, the output ports require refreshing for every scanning period.  One example is a system of multiple dot-matrix LEDsFile has many circuits, scroll to find this one __ Circuit Design by W Kurdthongmee, Nakorn Si Thammarat, Thailand

Scheme Improves On Low-Cost Keyboard 30-Oct-03 EDN-Design Ideas You can easily improve on a previous Design Ideas to produce a slightly simpler resistor arrangement with better timing balance between switches, using a single resistor value(Reference 1, Figure 1].  The use of a single resistor value, RS, in a series chain for the switch resistors gives the timing parameters a simpler format and should reduce bill-of-materials cost __ Circuit Design by Martin O'Hara, Telematica Systems Ltd, Cranfield, Bedfordshire, UK

Screenshoot Of Freepcb Screenshoot of FreePCB Circuit search tags:Circuit diagram board HBBX-058A

SD Memory Card Interface SD memory cards, especially the ones under 1GB are cheap, relatively easy to interface and provide vast amounts of memory for imbedded control.   __ Designed by Luhan MonatMesa Arizona

SD/SDHC Card Interfacing with ATmega8 /32 (FAT32 implementation) Hi friends, Here is my project on interfacing of SD Card (microSD).  microSD cards are available very cheap nowadays, a great option for having a huge memory in any embedded system project.  It is compatible with SPI bus, so the interfacing is easy.  

Sega 3D Glass Interfacings This documents ties to clear out one method for connecting Sega 3D glasses to PC serial port for cheap PC virtual reality.  This who do no not know what those Sega 3D glasses are, here is a description: __ Designed by Tomi Engdahl

Self-modifying code extends addressing Mode 12/17/98 EDN-Design Ideas As just about any assembly-language programmer knows, self-modifying code (SMC) is usually undesirable, unintentional, and destructive.  However, the SMC routine in Listing 1 is extremely useful to extend the indexed, 16-bit offset addressing mode of the venerable HC05 C from 8 bits, or 256 locations, to the full 13-bit (8-kbyte) memory address space that the Cs architecture supports.  This routine is very useful for error tables, text messages tables, or any array manipulation for a large number of elements.    __ Circuit Design   Paul Sofianos, Motorola Inc, Tempe, AZ

Self-Powered Soundcard High fidelity external USB Soundcard / USB Headphones project that can be built for your PC or Mac.  It is based on the latest PCM2706 IC which functions as a high quality, crystal clear 16-BIT Stereo DAC.  It is a single chip digital-to-analog converter that offers two D/A output stereo channels, digital S/PDIF output and requires very few external components.  PCM2706 includes integrated USB 1.0 & USB 2.0 compliant interface controller and it is conveniently powered directly from USB connection.  PCM2706 is a USB plug-and-play device and does not require any driver installation under Windows XP and Mac OSX.  

Serial Communication A very popular method of sending and receiving data between devices and computers is good old asynchronous serial communication.  See traces of characters being transmitted.  Learn how far timing can be off before introducing errors.  Includes a table of popular crystal frequencies and baud rates, as well as machining information and a source code snippet for an automatic bps detection tool.   __ Contact: David Cook

Serial Controller IC Interfaces with ADSP2100A 03/28/96 EDN-Design Ideas The ADSP2100A DSP chip from Analog Devices has no serial port.  To interface the device with a PC through the RS-232C port or to another serial line, you need to add a serial communications port to the DSP card.  You can add this port by using a serial-communications-controller (SCC) chip, such as the Intel 82530, as a memory-mapped peripheral.  The ADSP2100A works at a speed of 12.5 MHz, so you need a fast SCC.  The 82530 is fast, compared with standard UARTs like the 8251.   __ Circuit Design by DVL Prasad and CA Jalaludeen, NPOL, Kochi, India

Serial Data Multiplexer Embedded computers and PDAs and have become popular as "brains" for robotics projects.  They usually have an RS-232 serial port that interfaces easily to a slave IO controller.  Unfortunately a single serial port can be a severe limitation if a user wishes to connect multiple serial devices.  This page describes one method to switch serial signals between a host device, such as a PDA or PC, and a slave IO controller or one other auxillary device with a serial interface __ Contact: Acroname Inc.

Serial Infrared Remote Controller This is a simple, cheap device that can be connected to any serial port to control most components that have infrared remote controls.  I designed and built it   (on a solderless breadboard) in 1991.  In 1992 I wrote a lengthy description of it for an electronics class.  In 1994 I finally designed a PC board for it, using a free, X-based PC board design program called pcb, and in 1995 I etched several of the boards and made the final product __ Designed by John DuBois

Serial Interface & Bias Supply for Seiko-Epson G1206b Dot Graphics Display A serial interface and bias supply for the Seiko-Epson G1216N000 using an AT90S2313 because there just aren't enough applications examples for this display on the web.   __ Designed by Dick Cappels

Serial LCD Controller Serial LCD/VFD Controller is a HD44870 based LCD/VFD controller via RS-232.  The control command is compatible with Matrix-Orbital's LCD module.  So, you can use any MO friendly software to control this baby such as LCDC. __ Designed by Dick Cappels

Serial LCD for MicroControllers using Only 3 Pins Connect an LCD to your microcontroller to make it easy to develop and debug your application.  You can choose which PIC I/O pins you want to use for the interface, and any HD44780 compatible LCD can be controlled.   __ Designed by Peter Jakab

Serial Port A/D Converter This circuit is a simple adapter for PC parallel port to think that there is a printer connected to computer.  This adapter is useful for testing printing speed with different software and as a part of your own designs. 
You can use this circuit to connect your simple circuits to the parallel port __ Designed by Tomi Engdahl

Serial Port Controller Infrared Transmitter PIC16f628 Control all your devices from the PC.  This infrared remote control transmitter can be controlled from a computer.  It speaks many different remote control formats, like the Philips RC-5 standard and can be tailored to other specific types.   __ Designed by Peter Jakab

Serial Port Drives 12 Bit ADC 10/12/95 EDN-Design Ideas The circuit in Fig 1 performs a task that a microcontroller usually performs, that of driving a 12-bit ADC from the serial port of a PC.  Power consumption is low; the 2-mA operating current drops to only 15 A in shutdown.    __ Circuit Design by John Wettroth, Maxim Integrated Products, Sunnyvale, CA

Serial Port I/O Expander This article shows how to use the PIC16F84 microcontroller with PicBasic to design a quick & effective, serially controlled, I/O-Expander.  Using PicBasic makes developing handysingle-chip devices like this extremely simple.   __ Designed by Reynolds Electronics

Serial Port I/O Interface This is a simple I/O interface using an AVR microcontroller.  The i/o pins are controlled by the AVR and can be used to drive LEDs, control RC servos, etc.  Using the attached relay circuit it can also be used to control relays.  This schematics also provides a programming interface.  

Serial Port Professional PIC Programmer Serial Port Professional PIC Programmer.  Here is the list of currently supported flash devices from Microchip PICmicro 12F and 16F product lines: 12F629

Serial port provides interrupts for 8031C 12/09/99 EDN-Design Ideas You can use the RxD pin of an 8031mC for external interrupts(Figure 1).  You program the serial port to receive in Mode 2 with a baud rate either 1/32 or 1/64 of.   PDF has several circuits, scoll to find this one.    __ Circuit Design by N Kannan, Mediatronix Ltd, Trivandrum, India

Serial Port Tests Digitals 25-Jun-09 EDN-Design Ideas The circuit in Figure 1 uses a MAX232 IC from Maxim to convert RS-232 voltage levels to TTL levels(Reference 1].  A 74HC4051 from Texas Instruments lets you select any of four digital inputs and route them to the serial port(Reference 2].  Listing 1 lets you control the RTS(ready-to-send] and DTR(data-terminal-ready] pins in the serial port that selects the signal under test __ Circuit Design by Yury Magda, Cherkassy, Ukraine

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