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Tricks increase utility of parallel port - 27-Sep-01 Issue of
EDN In this simple application of the 68HC68 microcontroller's
serial-I/O utility, the goal is to configure a simple circuit, driven by
any LPT parallel-printer port, which you can use as a remote I/O for a PC.
You can independently program each I/O line as either an input or an
output. The protocol in this application is an SPI (MISO/MOSI/SCK] type,
using synchronous serial communications.... [Design Idea by Lorenzo
Tazzari, Selex SNC, Alessandria, Italy] |
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Triple Output 3.3V 5V & 12V High Efficiency Notebook Power Supply -
DN78 Design Notes (Linear Technology) (app note added 1/06)
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TSR Logs Assembler & Compiler Errors In File - 04/27/95
EDN-Design Ideas If you use a PC to develop software for embedded
systems, you probably still use good, old MS-DOS for most of your
processing, because most compilers, assemblers, and linkers don't run
under MS Windows.....EDN is migrating links. This link is not verified.
Search the "title" EDN for new link. |
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TTL <> RS232 Conversion - This small realization, based on one
of the most common IC (MAX232) is designed to create a small and
convenient TTL to RS232 and vice versa converter. All you need is 4 caps,
one IC….(added 08/08/08) |
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[ad-DAJ-FS-split.htm]
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TV RGB Signal Output from a SVG Graphics Card - To achieve a CCInfrared
conform TV signal with50 Hz vertical interlaced refresh and15.625 kHz horizontal
frequency on most SVGA cards its possible to re-program CRT Timing and generate output
signals outside the normal specification range. Then some pretty simple hardware is
needed for rest of the signal conversion. (added 4/02) |
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Two Channel Port Powered RS-232 to Rs 242 Converter - information on
commercial product, datasheet includes full circuit diagram (added 4/02)
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Two Transistor Circuit replaces IC (Hagtech) - I am always impressed with
the way semiconductor manufacturers go out of their way to make the end designer’s job
easier. One example is the LTC4300 recently introduced by Linear Technology…. [Jim
Haggerman, Hagerman Technology LLC] |
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Two Transistors Form Bidirectional Level Translator - You often need to
convert a logic signal from one power-supply voltage to another. This conversion
is a relatively simple task, unless the signal happens to be bidirectional. Serial
buses such as Access.Bus, I2C, and SBI use bidire�Ψt into.... [Design Idea by Jim
Hagerman, Nokia Mobile Phones, San Diego, CA] |
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Two Wire LCD Interface using PIC16cf84 - (schematic / Circuit design added
9/02) |
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Two-transistor circuit replaces IC - 7-Feb-02 Issue of EDN Linear
Technology's recently introduced LTC4300 chip buffers I2C clock and data lines to and
from a hot-swappable card. This task is difficult because the IC must work
bidirectionally, meaning that you can simultaneously and actively drive both sides.
However, as is sometimes the case, you can replace a complicated circuit by a simple
one without much loss of performance.... [Design Idea by Jim Hagerman, Hagerman
Technology, Honolulu, HI] |
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Two-wire, four-by-four-key keyboard interface saves - 08/17/06 EDN-Design
Ideas You can use a microcontroller that includes an ADC to design a
two-wire-plusground keyboard interface. For example, you can use a resistive voltage
divider to identify a pressed key (Reference 1). A microcontroller’s integrated ADC
typicallyou can use a microcontroller that includes an ADC to design a
two-wire-plusground keyboard interface. For example, you can use a resistive voltage
divider to identify a pressed key (Reference 1). A microcontroller’s integrated ADC
typically.... [Design Idea by Stefano Salvatori, University of Rome, Rome, Italy; and
Gabriele Di Nucci, EngSistemi, Rome, Italy] |
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Typical DP8570A Interface to the IBM PC/Xt for the Purpose of Engineering Evaluation
- National Semiconductor Application Note (app note added 2/06)
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Ultra2 Scsi White Paper AN-2 - Application Note 2 from Microsem (app
note added 6/06) |
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Ultra-High Performance Line Driver - AS027 Jenson Transformer Application
Note (app note 6/07) |
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Ultra-High Performance Output Stage - AS026 Jenson Transformer Application
Note (app note 6/07) |
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Unbalanced Long Line Driver/Isolator - AS056 Jenson Transformer Application
Note (app note 08/08/08) |
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Understanding Droop & Programmable Active Droop™/ AB-24 - Fairchild
Application Notes / (app note added 6/06) |
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Understanding Intel HEX file - An illustration of intel HEX file.
(circuit added 09/09) |
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Understanding Power Requirements in RS-232 Applications - National
Semiconductor Application Note 05 Oct1998 / (app note added 5/02) |
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Understanding the Operation of a CRT Monitor - National Semiconductor
Application Note (app note added 2/06) |
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Universal Infrared Controller for a PC - This simple circuit allows you to
record any Infrared remote control signal on your PC, and then play it back.
This is particularly useful if you want to control appliances such as TVs, VCRs, CDs
etc. from your computer. The device simply connects to the parallel port of your
PC.... This circuit was originally published in Electronics Australia,
September1998 (added 4/02) |
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Universal Power Supply - (electronic circuit added 6/07) |
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Universal Serial Bus Power Management - Micrel Application Note (app
note added 6/06) |
