Electronics Forum / Electronics / December 2004

I wish to use an ordinary 230V ac light bulb in multiple ways ,
all at the same time.
The bulb will be part of an metal reflector construction.
My wish is to control the intensity of light , ususal voltage control

Hi, anybody experimented with a clear memory switch to get rid of
unwanted junk faxes?  My model is a Sharp UX-A255.
I wonder if clearing the memory would could cause loss of any settings I
programmed into the device.

Hi! I was wondering if anyone could help me find a way to convert lcd
text to speech with as few parts as possible (i.e. using a winbond or
other text to speech processor via the spi port on the lcd (?) and spi
port on the winbond (or other) text to speech processor) so that a

Sorry for cross posting but I  need instant response.
My assignment is due this wednesday and wondering someone would help. In
PSpice, I need to setup a 1MHz Digital Clock, I used DSTM modules, I need
some delay time and also initial values of the clock, the only thing I

Since last boxing day our tv reception has been dodgy (bad interferance on
ch 2, others noticable) since some moron backed over the outside lights
which are on the same circuit as the tv amp.  I am in search of a GOOD
antenna/tv tech to come an sort this mess out, previous techs ...

I want to blow my enemies away.What do I need to build such a dangerous weapon?

From my days studying electronics (or as I recall), PFC was basically
implemented to correct usages in current for the meter man.
How true is that?  Is there any performance to be gained with the device
after correction?

Hello I am new to computer interfaces and i need something which i can drive
at least 29 devices via relay.  No inputs with this though.  Nothing fancy
just either on or off.  What hardware would i need to do this? what kind of
price range are we talking?  Thanks in advance

The circuitry on DVD to stop copying is it similar to the old Copyguard
standard of 25 years ago?If you wanted to make a copy from a home DVD
player to VHS tape how would this be done?

I am new in the RF field and I have a question regarding Pi Networks
and S parameters.
I was recently reading an article about Pi networks and it uses in RF.
I am confused about a couple of things.  The article said the k=1/S21,

I'm building the Silicon Chip Energy Meter Kit (Jul/Aug 2004). I can't
see the point of R2, an 0.01 ohm resistor in series with a 1K 1%
resistor in the AC current sense circuit. For perfect resistances R2
would make perfect sense (impedance matching on the inverting and

I after older microprocessor development type boards and BOOKS .. late
1970's1980's and early 1980's ..mainly all the early microprocessors,
8080,8085,z80,6502,6800,SC/MP 2650 etc and all the early 16 bit ones
8086,TMS9900,68000 ,z8000 etc ..

Is there any way of cleaning mould of the inside of a VHS video tape without
destroying the content on the tape?
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Is it practical to use an IR thermometer to read surface temperature. The
application would be under a vehicle, at highway speeds, on asphalt, with
patches of ice. I was thinking of a  remote sensing temperature probe, with
a range of about 8 inches. I know very little about ...

Any help on this please!!!
My stereo has stopped working. Its only a cheap stereo but it fits where
it needs to if you know what I mean.
Basically, the CD doesnt spin anymore and I just get an error message.