Electronics Forum / Electronics / October 2004

I have been fiddling with drawing schematics on the puter. I have no
knowledge of even the basics of CAD stuff, I'm a real beginner here. A real
Elmer Fudd. All I want to do is throw a few components together with a few
lines. Very few at this stage :))

Dummy unit for the I/O system
or
Dummy unit for the CPU system
can somebody maybe explain what is dummy unit for?

  I have a P4 2.8GHZ with HT, GA-8AIPE1000 pro 2 motherboard
 1GB  PC3300 RAM
  1 x 120GB HDD
  1 x 40GB HDD

I would like to make a light display with many LEDs connected by wires of
various lengths.  I would like to use some sort of header and connectors to
connect the LEDs to the PCB.  The LEDs will be controlled by a PIC through
shift registers.  Each LED can be turned on and off ...

I would like some comments on this idea (please keep it nice).
I am looking into various types of sensors for a driveway alarm on
a farm.
PIR, Infrared beam etc.

I was wondering if you can  possible get better than stereo with a headphone.
Any ideas???

How to extend wireless ethernet (802.11b and/or 802.11g) connection
range to omni-directional 2-3km?
Does it need power amplifier and special antenna if so is it
license-free?

   I have been servicing TVs for years.  One thing I learned,
when I see a picture,  I can usally tell if the picture tube is getting "soft"
(below normal emission).   When I see this in TVs that are not very old,
I will check the picture settings (via menu), and sure enough, ...

Hi i'm new to the group, and i'm not really to awesome when it comes to
electronics, so I thought I would ask people who really know!
Heres the situation: I play bass in a thrash/rock-punk band and I want to
customise my bass a little. And my idea is to place red LED's under the

We can test normal PNP and NPN transistors with OhmMeter.
Can we test (how) MOSFETs in the same way?

Hello Group,
Could someone please advise me on creating a spice3 output file
(through the unix format) which prints a given output with no spaces
or page breaks.  For example, I'm trying to determine the real and

is there any good website to learn about transistors, mainly:
dc biasing techniques, reading data sheets and choosing right one for
a given application.
thanks for reading this.

Can anyone of you guys on here tell the difference between mono and stereo
sound? I tested 6 of my friends and only 2 were able to definitively tell the
difference, so I was wondering how effective stereo or Dolby 5.1 is ... let me
know.

I am using an old 386 machine only because it houses a logic analyser
card in a ISA slot.
I would like to take the card out of there, plug it into a box with a
USB connector, and use it on my notebook computer.

http://www.niktech.com
Hardware Features
· Data Path Width 32 bits
· Most instructions are 16 bit. PC Relative jump instructions are 32 bit.