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Computer Interfaces
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Computer Interface:
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
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PAL Controls Simple Dual Port Memory - 04/27/95 EDN-Design Ideas
EDN is migrating links. This link is not verified. Search the
"title" EDN for new link. |
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PAL Facilitates In System Programming - 03/01/96 EDN-Design
Ideas The advantage of in-system programming is to provide software
updates or changes in system configurations without any component changes.
Figure 1 shows an approach, which includes the 8051 µC, programmable
memory device (EEPROM, or flash memory, for example], RS-232C
interface,...[Design Idea by YS Tam Canadian Marconi Co Ottawa, ON,
Canada] |
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PAL Powers Universal ISA Bus Interface - 02/02/95 EDN-Design
Ideas A pc board bearing the 16-bit ISA data-bus interface in Fig 1
can adapt automatically to either 8- or 16-bit motherboard
slots....[Design Idea by Jerzy R. Chrzaszcz Institute of Computer
Science, Warsaw University of Technology, Nowowiejska, Warsaw, Poland] |
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Palmpilot Turbo Boost Guage Interface - (electronic circuit
added 4/05) |
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Parallel (Printer) Port Interface - ….(Circuit design added
06/09) |
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Parallel Application of High Speed Link - National Semiconductor
Application Note (app note added 2/06) |
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Parallel AVR Programmer - (electronic circuit added 4/05) |
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Parallel Connection of Power OP Amps - Power op amps can be paralleled
to increase current, improve SOA (Safe-Operating-Area), or double thermal
capability. While the basic topology seems simple, there are design details
which require careful attention such….(Cirrus App Note 26 added 06/09)
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Parallel PC Interface - One thing I like to do with computers is
controlling hardware. Thats the reason for creating a parallel communication
interface connected to the printerport of a computer. First I started with a
Z80PIO chip on a Z80CPU controlled ZX Spectrum. When I bought my first laptop I
knew I would need a compleet new interface. The Z80PIO interface had 16 channels
of which each channel could be configured for input or output. Because of the
limitations of the parallel port I decided to create 16 input channels and 16
output channels.... (added 10/05) [Scumari Technology] |
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Parallel Port Central - information on using PC parallel port for I/O
and Windows drivers for that, useful for your own circuit interfacing
(added 4/02) |
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Parallel Port Controller - Control Appliances Through a Computer
(circuit added 8/06) |
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Parallel port controls arbitrary-waveform generator - 13-Jun-02 Issue
of EDN You can use the parallel port of your PC and a few additional
components to generate a powerful, easy-to-use arbitrary-waveform generator. By
using a Visual Basic program with the circuit in Figure 1, you can generate any
waveform (for example, sinusoid, triangle, amplitude- or frequency-modulated, or
exponential decay] by simply entering its characteristic equation.... [Design
Idea by Art Kay, Texas Instruments Inc, Tucson, AZ] |
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Parallel Port Interfacing Made Easy - PC parallel port was never
designed to provide any output power to divices connected to it. it was only
designed for connecting printer to your PC . But in this weird PC business
everything changes. Suddenly the parallel port have become a port where you can
connect 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 homebuilt
circuits....(electronic schematic / circuit added 11/05) |
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Parallel Port Powers Simple A/D Interface - 10/23/97 EDN-Design Ideas
If you have to sample just a few low-rate analog signals, or your PC's slots are
all full or too outdated for the newer data-acquisition products, a simple
interface may be all you need. You can build such an interface that requires no
external power supplies or adapters (Figure 1]. This design.... [Design
Idea by David M Acre, McDonnell Douglas Aerospace, St Louis, MO] |
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Parallel port provides high-resolution temperature sensing - 3-Oct-02
Issue of EDN High-resolution temperature sensing at low cost is possible
using only one chip attached to the PC's parallel port (Figure 1]. The Dallas
Semiconductor (www.dalsemi.com] DS1722 digital thermometer allows measurement
resolution as fine as 0.0625°C in digital form and with linear response. The
accuracy specification is only 2°C, but you can improve this figure by careful
calibration.... [Design Idea by Martin Connors and Mike Foote, Athabasca
University, AB, Canada] |
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Parallel Port Relay Interface (Bill Bowden) - Below are three examples
of controlling a relay from the PC's parallel printer port (LPT1 or LPT2).
Figure A shows a solid state relay controlled by one of the parallel port data
lines (D0-D7) using a 300 ohm resistor and 5 volt power source. The solid state
relay will energize when a "0" is written to the data line. Figure B and C show
….(electronic circuit added 4/05) |
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Parallel port replaces embedded µC - 12/31/69 EDN-Design Ideas Many
applications use an embedded processor, which has certain needs: software, RAM,
ROM, board space, and others. Frequently, another host computer, usually a PC,
controls the application. Using a single CPLD, you can dispense with the
embedded processor....[File contains multiple circuits. Scroll to find
this one.]....Design Idea by Eli Kohav and Leonid Grossman, ECI Telecom,
Petah-Tikva, Israel] [Design Idea by Eli Kohav and Leonid Grossman, ECI Telecom,
Petah-Tikva, Israel] |
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