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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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M Asim Khan's Programmer Ver 3.1 - Latest M Asim Khan's
Programmer featuring more chips, enhance programming speed, support
Window2000/XP. New target chips, 87C51 and 87C52. (circuit added
09/09) |
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Mac Serial Port RS-422 DIN-8 to RS-232 DB-25 - (electronic
circuit added 4/05) |
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Mac to HP48 cable pinout - (diagram added 2/07) |
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Mains Frequency Meter - Mains frequency is pretty stable and it
is unlikely that you have to measure it but if you have an emergency
generator you might find this circuit useful as it will give an indication
whether the generator is running too fast or too slow. Actually you can
use the mains frequency to calibrate.... (added 9/07) |
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Mains Manager - (electronic Circuit / Schematic added 10/04)
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Mains-operated Capacitive Sensor - Easily adjustable, high
sensitivity circuit. Minimum parts counting (added 3/05) |
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Maintain precise timing with PC's speaker logic - 11-Jul-02
Issue of EDN Precise timing control is paramount in data acquisition
and analysis and especially in digital-signal.... [Design Idea by DS
Oberoi, CEDTI, and Harinder Dhingra, GCET, Jammu, India] |
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Make a printer port EEPROM programmer and dongle - 13-May-04 Issue of EDN
You can easily use a PC's printer port for serial-EEPROM programming. You can use a
device-programmer circuit used to program the MicroWire serial EE-PROM 93CXX (Figure
1]. The circuit is so simple that any further simplification seems impossible.
This programmer circuit contains no microcontroller, as most device programmers do....
[Design Idea by GY Xu, XuMicro, Houston, TX] |
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Make eight-channel measurements through an LPT port - 13-Jun-02 Issue of EDN
The circuit in Figure 1 represents a simple and cost-effective way to obtain
eight-channel analog-signal acquisition through a PC's LPT port. IC1, a 12-bit,
serial-output MAX187 ADC, operates from a single 5V supply and accepts analog inputs
of 0 to 5V. IC2, an eight-channel MAX338 analog multiplexer, also operates from a
single 5V supply.... [Design Idea by J Jayapandian, IGCAR, Tamil Nadu, India] |
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Make Your Own Single-Side PCB for Easy-Downloader V1.1 - I am very happy
with my student, Plermjai(his name means feel delighted too) Inchuay (his family name
means angel helps him), who provides me his page describing how-to-make a single side
PCB for the Easy V.1.1. So cool! his prototype was made by hand writing with a pen for
making PCB! Available now single side with Protel format. (circuit added 09/09)
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Make Your Own Single-Side PCB for Easy-Downloader V2.0 - This work was
contributed by Bruno Macio from Brazil, a single-side PCB for Easy II with MAX232C for
RS232 level converter. For those who use Portuguese may ask him directly.
(circuit added 09/09) |
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Mass Storage Deviceusing a PIC MCU - Microchip Application Note Published
30-Aug-05 (app note added 6/06) |
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Mass Storage Hard Disk (sb-113) - National Semiconductor Application Note
(app note added 2/06) |
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Mathematical Manipulation of Pure Sine Wave Inverter using ATMEL 89S2051 -
Didik Rostyono and Harsono Hadi explain how to produce the sinewave output inverter
using the ATMEL microcontroller! (available only in pdf file (274kB), click the link
to download it) (circuit added 09/09) |
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MAX555 PLCC to TQFP Printed Circuit Board PC B Layout Guidelines - Maxim
Application Notes / 1120 / Mar-09 (app note added 5/08) |
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MCS-51 endows MicroLan-like protocol to UARTs - 05/07/98 EDN-Design Ideas
Piezoelectric buzzers, such as the Murata (Smyrna, GA]PKB5-3A in Figure 1, make
excellent alarms. They're compact, lightweight, efficient, and reliable. However, a
piezo alarm is a dc device; it requires additional circuitry to operate from an ac
source....NOTE Page includes several designs, scroll to find this one....
[Design Idea by SK Shenoy, NPOL, Kochi, India] |
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MCU_PG.zip - New Program and firmware for SUNROM Programmer by Majid Mahmoud
Pour Eftekhari Foumani from Iran. (circuit added 09/09) |
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Measuring Ethernet Tap Capacitance - National Semiconductor Application Note
(app note added 2/06) |
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Method & Advantages of Synchronizing Two RC5051 Converters/ AB-13 -
Fairchild Application Notes / (app note added 6/06) |
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Method provides automatic machine shutdown - 27-May-04 Issue of EDN
Some machines need to run for long periods and therefore may finish their work in the
middle of the night or during the weekend. For the time remaining, until the operator
returns, the machines stay idle, uselessly consuming power. This Design Idea
allows a machine to completely shut itself down after finishing its work.... [Design
Idea by Jean-Bernard Guiot, Mulhouse, France] |
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Computer Interface:
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