Electronics Forum / Electronics / November 2006

I'm designing a gadget which uses a small micro to look at the
0V/3.3V logic states on 125 lines. I need to turn it into serial data.
It doesn't have to be very fast.
   There doesn't seem to be any electrical problem with stringing 16

I am looking for a circuit that will activate a trigger every 24 hrs and count the pulses and
display the count using 3 or 4 7 segment led displays (the display will need to be resetable).
I need something that is fairly power efficient as it would probably be battery operated. ...

I have bought a dock for my laptop (Thinkpad), from the US, which comes
with its own power supply. The power supply accepts 100-240V AC, and is
2 pronged.
However I have found that in Australia, the same power supply for the

       lately around where i am the power has been going out for long
periods (its the local power company) anyway i was thinking of having some
sort of 12v backup supply to drive some things on 12v when power is out any
ideas on the best logical way, i did think solar panel ...

I want to make a small device that will record basic sound snippets, for
example, depending on the size of the memory, 100-500 3-5 seconds sound
snippets. It needs to be real small, possibly the size of a matchbook.
Any ideas on where to look, I have googled for sound chips and ...

I recently ordered the following panel meter from a Jaycar stockist:
http://www.jaycar.com.au/productView.asp?ID=QP5585
The catalogue describes it as "not just a digital display, but a fully
functional high impedance digital panel meter that only requires power

I am looking at getting a four or eight channel digital video recorder
for home security, and am looking at what is around. I would like an
ethernet interface, to enable web viewing. Has anyone used one of these
Digital Video Recorders from Jaycar / Electus? If so what do you ...

At my local library book sale, I found a book "Troubleshooting
Microprocessors and Digital Logic". It looked good, so I bought it. For
25 cents, how could I lose? Anyway, I read through it, and some guy has
chapter 9 bookmarked - "Radio Shack's TRS-80 Microcomputer". The first

ALL,
I have just lost my remote control key for this car alarm is it possible to
make or purchase one from somewhere any assist would be appreciated.
SAM

I have a Lithium-Ion 7.2V battery for a SONY camcorder, that although brand
new and fully charged, it does not show any voltage at the output teminals.
I suspect that this is the work of some kind of internal protection circuit
to prevent accidental shorting of the output ...

With all the push towards lower power consumption in home appliances,
like new standards for standby power consumption of televisions and DVD
players, why hasn't anyone bothered trying to put some thermal
insulation around an electric kettle ?

eg like the useful
Television and Video recorder viewer adjustments
http://www.dubdubdub.net.nz/tune_in.htm
that was on http://www.oh-bugger.net.nz/eric/tune_in.html

Hi to all,
One of the staffers at EA magazine, back when Leo Simpson was the editor,
was an Andrew Levido.
In May of 1985, a project appeared under my and his name entitled: " True

All energy signatures are results of the EM wave ,including
gravity. The photon is conprised of 4 basic
particals, 2 electrons and 2 positrons. lined up +-+- like a bar
magnet, the hertz of the EM wave created is

Galileo (NOT Einstein) is inventor of Second postulate of
Relativity
Einstein’s June 1905,  paper is known as Special Theory of
Relativity?