Electronics Forum / Electronics / September 2005

There is a story circulating that the semiconductor chips
made by Texas Instruments contain so many toxic chemicals
and are out-gassing fumes that they can be used to
exterminate bugs simply by tossing several TI chips in

Hello all I have a small project I have been working on and need a
little help. I have a board with a 27c160 bios chip on it and I need to
be able to switch the bios back and forth between two version. Its not
easy to change the chip because its under a few things. So I made a

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I need to measure the power of some devices. I'm thinking to made a
digital ampermeter, since I already know the voltage (220 V), I only
need to measure the current to get the power (according to the formula
P = I x V), right?

I've had a Panasonic 4-Head OmniVision VHS VCR for a few years.
A few days ago, I found that when I try to use the remote, the
display on the VCR shows the message 7-U and then does nothing.
I can operate the VCR manually, so I still have the use of it.

I work in the trailer manufacturing business.
We use LED tail-light clusters.
The modern truck/tractors utilise a computer system to perform diagnostics
on various systems within the rig. One of these is the lighting system.

I have a (fuel level) sender that changes resistance from 0 Ohm (empty) to
90 Ohm (full). Fuel gauge, however, expects 0 Ohms on Full and about 250
Ohms when empty. Gauge is controlled electronically (via onboard computer),
so I can't rewire the gauge itself, it has to be the ...

I am looking for opinions on grounding techniques, particularly in
automotive circuits.  I have designed a circuit that uses both digital and
analogue circuits and I was planning to connect these grounds at a single
point to attempt to keep digital noise away form the analogue ...

I have built a hydrogen generator and have it running on a 12 volt,
amp battery charger.  Now, to improve the effeciency and productio
rate, I need to convert my 12 volt DC to 2 volt DC (that is ideal,
to 4 volts would work), also for best hydrogen production, I need 2

    I recently heard that one of the negotiations going on between
North Korea and several other countries may involve the sale of
electricity from South Korea to the North.  This poses an interesting
situation.  I believe that South Korea runs on 60-HZ A.C. like is used

Hi all. In got no responses to the last post , so I'll try again , in
case my news server did not let it through.
I am looking to make a pfc cct using the uc3852 chip and have a few
questions.The info I have is the U-132 app note from Unitrode and the

http://www.want-to-be-sure.blogspot.com << Click On Link

I am looking for a male/female electrical contact that we can mold
right into our housing that will be plastic injection molded.  The end
application will be high volume, but right now we are trying to build
some prototypes.

I need to find a physically very small part to switch a signal.
Either electromech relay or electronic part would be OK.
signal single-ended, varies from DC to at about 1GHz.
signal voltage up to 6Vp-p

Commlinx were the Aust agents for Laipac and offered a fairly decent magnetic
active (5V) patch antenna with MCX/OCX or SMA connector at a reasonable price.
However since that site was taken over by Laipac, the only options appear to be
to pay double to some other sources or order ...